Search – Lazy IITians Viva Prep

See reviews APPDEV_LEVEL1_VIVA7 MAD1 Level 1

Aug 14, 2026

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1

First he ask for demo, when i start my demo he immediately start questions contest

Times asked 2

Official solution

SimpleDemo script pehle se practice: 5–7 min, Admin + User roles, saare mandatory features.
Suggested flow1) Register/login user
2) Admin login — CRUD
3) Approval/blacklist
4) Booking/apply + edge case
5) Search
6) Logout
Viva tipBolte-bolte dikhao. Code tab kholna jab poochhein.
2

What is CRUD. Explain me in your project.

Times asked 2

Official solution

SimpleCRUD = Create Read Update Delete. Admin pe ek resource ke 4 ops dikhao.
3

How these statistics cards logic works, how the counting part connected and where the stats variable define in your project.

Times asked 2

Official solution

SimpleCode explain formula: input kya aaya → auth/validation → DB change → response/UI.
Viva tipFunction signature + 3-4 important lines + edge case.
4

What is Idempotency.

Times asked 2

Official solution

SimpleIdempotent = same request N baar = same effect. GET/PUT/DELETE usually; POST create duplicate ho sakta hai.
5

Open your notepad, Question: "There is a company which have an api name 'movies', in this api have all movies then, Write frontend code that give 'movies list'...Simple 🫠"

Times asked 2

Official solution

SimpleViva wrap-up hai. Short thanks + confirm submission ZIP latest hai.

Advice: Coding question is same almost with little bit modification. He love vue files mostly, so know your vue working connection, buttons, variables.

See reviews Level2_84 MAD1 Level 2

Aug 14, 2026

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1

Application Functionality and Data Handling

Times asked 2

Official solution

SimpleProject overview: problem → roles → main entities → key flows (register, book, admin approve).
Viva tip1 minute elevator pitch ready rakho, phir demo.
2
- Where are you storing the uploaded resumes (e.g., static folder or backend upload folder)?

Times asked 2
Official solution

Simplestatic/ folder CSS, JS, images. url_for('static', filename=...) se link.
Example
```
<link rel="stylesheet" href="{{ url_for('static', filename='css/app.css') }}">
```
3
- Is the CSV download handled via Celery or a specific endpoint?

Times asked 2
Official solution

SimpleCelery = background naukri. HTTP request ko 10 second email bhejne ke liye mat rokna.
Distributed task queue: aap function ko abhi nahi, worker process mein later/retry/schedule pe chalaate ho.
MAD2 typical jobs: daily reminder mail, monthly HTML report, user-triggered CSV export.
Web request 200ms hona chahiye. 10,000 emails request thread mein = timeout. Worker alag CPU pe kaam kare.
Redis broker chahiye. Beat alag process schedule ke liye.
Example
```
@celery.task
def daily_reminder():
    for u in User.query.filter_by(active=True):
        send_mail(u.email, 'Book something today!')
```
Project example: User Export click → 202 Accepted. Worker CSV + email. Daily 6pm Beat reminder.
Viva tipWorker + Redis bina Beat ke user-triggered chalega. Scheduled jobs ke liye Beat bhi chahiye.
4

- Can you open the downloaded application CSV?

Times asked 2

Official solution

SimpleExported CSV download folder/MailHog se open — columns verify. Celery job ke baad file path dikhao.
5

- Can you download a resume for me?

Times asked 2

Official solution

SimpleDemo script pehle se practice: 5–7 min, Admin + User roles, saare mandatory features.
Suggested flow1) Register/login user
2) Admin login — CRUD
3) Approval/blacklist
4) Booking/apply + edge case
5) Search
6) Logout
Viva tipBolte-bolte dikhao. Code tab kholna jab poochhein.
6
- Do you have any validation in the application regarding passwords or other fields?

Times asked 2
Official solution

SimpleValidation = input rules: required, email format, length, unique. Frontend UX, backend security — dono.
Example
```
if not email or '@' not in email:
    flash('Invalid email')
    return redirect(request.url)
if User.query.filter_by(email=email).first():
    flash('Email taken')
```
7

- Can you export the application and show the updated CSV?

Times asked 2

Official solution

SimpleExported CSV download folder/MailHog se open — columns verify. Celery job ke baad file path dikhao.
8
- Can you change an application status from "shortlisted" back to "applied" in the UI?

Times asked 2
Official solution

SimpleLive UI change: relevant CSS/HTML template kholo — color, margin, flex, bootstrap class. Save + hard refresh.
Example
```
/* button red */
.btn-primary { background: red; }

/* center navbar item */
.navbar { justify-content: center; }
```
Viva tipDevTools se pehle try, phir file mein permanent change.
9

- What happens in the "update profile" section?

Times asked 2

Official solution

SimpleDemo script pehle se practice: 5–7 min, Admin + User roles, saare mandatory features.
Suggested flow1) Register/login user
2) Admin login — CRUD
3) Approval/blacklist
4) Booking/apply + edge case
5) Search
6) Logout
Viva tipBolte-bolte dikhao. Code tab kholna jab poochhein.
10
- Does the "joining date" field only appear once a student is "selected"?

Times asked 2
Official solution

SimpleJOIN related tables ek result mein. Inner = match only; left = left side sab + match.
Example
```
db.session.query(Booking, User).join(User).filter(User.id == uid).all()
```
11

Backend and Database Architecture

Times asked 2

Official solution

SimpleMAD1 typical: Browser → Flask routes → validate/auth → SQLAlchemy → SQLite → Jinja response.
Suggested flowRequest → Route → Auth check → DB → render_template / redirect
12

- Can you explain the code organization and where everything is located?

Times asked 2

Official solution

SimpleCode explain formula: input kya aaya → auth/validation → DB change → response/UI.
Viva tipFunction signature + 3-4 important lines + edge case.
13
- Who is defined as a "user" in your models?

Times asked 2
Official solution

Simplemodels.py = har table ki class: columns, PK/FK, relationships. Yeh Model layer hai.
Suggested flow1) Classes list karo
2) Har table ka kaam 1 line
3) Relationships (1-M / M-M)
4) Constraints (unique, nullable)
Example
```
class Lot(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(80), nullable=False)
    spots = db.relationship('Spot', backref='lot', lazy=True)
```
14
- How are you linking the student, company, and user tables (relationships)?

Times asked 2
Official solution

Simpledb.relationship se object graph: lot.spots, booking.user. backref reverse side auto deta hai.
Example
```
spots = db.relationship('Spot', backref='lot', cascade='all, delete-orphan')
```
15
- Are company details being stored directly in the user table?

Times asked 2
Official solution

Simplemodels.py = har table ki class: columns, PK/FK, relationships. Yeh Model layer hai.
Suggested flow1) Classes list karo
2) Har table ka kaam 1 line
3) Relationships (1-M / M-M)
4) Constraints (unique, nullable)
Example
```
class Lot(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(80), nullable=False)
    spots = db.relationship('Spot', backref='lot', lazy=True)
```
16
- Can you explain what "backref" is and how it is used?

Times asked 2
Official solution

Simplebackref reverse attribute auto banata hai. back_populates dono sides explicitly naam dete ho — clearer.
Example
```
# backref
spots = db.relationship('Spot', backref='lot')
# spot.lot available

# back_populates
spots = db.relationship('Spot', back_populates='lot')
# Spot.lot = db.relationship('Lot', back_populates='spots')
```
17
- Why did you choose to use an ORM (Object Relational Mapper) like SQL Alchemy?

Times asked 2
Official solution

SimpleORM = Object Relational Mapping. Tables → Python classes. Raw SQL kam likhte ho.
Example
```
class User(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    email = db.Column(db.String(120), unique=True)

User.query.get(5)  # SELECT ... WHERE id=5
```
18
- What kind of database is SQLite?

Times asked 2
Official solution

SimpleSQLite file-based DB — setup easy, MAD1 ke liye perfect. Production heavy traffic pe Postgres better.
Example
```
SQLALCHEMY_DATABASE_URI = 'sqlite:///app.db'
```
19

- What is the difference between a relational database and a non-relational database?

Times asked 2

Official solution

SimpleRelational tables SQL ACID FK. NoSQL flexible schema, scale writes. MAD2 SQL + Redis side-cache.
Pick: bookings integrity → SQL. Session cache → Redis.
Pehle 1-line definition, phir related MAD2 layer (Vue SFC / Flask route / models.py / tasks.py / Redis).
4-line formula: input kahan se aaya, auth/validation kaunsa, DB ya cache ya Celery, kya return.
Related mix mat karo — cache ≠ Celery, authentication ≠ authorization, v-if ≠ v-show, Beat ≠ Worker. Follow-up ke liye ek difference ready rakho.
Project example: models relational. cache Redis.
20
Error Handling and Advanced Logic

Times asked 2
Official solution

SimplePehle 1-line definition, phir apne MAD1 project mein file dikhao, phir chhota example.
Suggested flow1) Concept kya hai?
2) Mere code mein kahan?
3) Example / demo
4) Edge case
Example
```
# related file: models.py / routes / template
# formula: request → check/auth → DB → render/redirect
```
Viva tipExact line yaad nahi to honestly related part dikhao. Bluff mat karo.
21
- Why are specific JWT error handlers (like expired or invalid tokens) written, and what is the purpose of the unhandled error handler?

Times asked 2
Official solution

SimpleJWT teen tukde ki signed chitthi: header.payload.signature. Padhi ja sakti hai, badli nahi ja sakti.
Encoded (Base64) + signed, encrypted nahi (JWE alag). Payload mein password mat daalo — koi jwt.io pe dekh lega.
Login pe server secret se HMAC (HS256). Har API Authorization: Bearer <token>.
Expiry exp. Change payload → signature fail → 401.
Session MAD1 server yaad rakhta. JWT MAD2 client rakhta, server stateless-ish.
Example
```
eyJhbGciOiJIUzI1NiJ9.{"sub":1,"role":"admin"}.signature
# Authorization: Bearer <token>
```
Project example: POST /login → token LS. fetch interceptor header. @jwt_required APIs.
Viva tipAlgo HS256. Secret env var. jwt.io pe payload dikhao, secret public site pe mat paste.
22

- Can you demonstrate or intentionally raise a 422 error from the backend?

Times asked 2

Official solution

SimpleDemo script pehle se practice: 5–7 min, Admin + User roles, saare mandatory features.
Suggested flow1) Register/login user
2) Admin login — CRUD
3) Approval/blacklist
4) Booking/apply + edge case
5) Search
6) Logout
Viva tipBolte-bolte dikhao. Code tab kholna jab poochhein.
23
- Can you show the inbuilt JWT functions you used, such as `get_role_claims` or `get_user_id`?

Times asked 2
Official solution

SimpleJWT teen tukde ki signed chitthi: header.payload.signature. Padhi ja sakti hai, badli nahi ja sakti.
Encoded (Base64) + signed, encrypted nahi (JWE alag). Payload mein password mat daalo — koi jwt.io pe dekh lega.
Login pe server secret se HMAC (HS256). Har API Authorization: Bearer <token>.
Expiry exp. Change payload → signature fail → 401.
Session MAD1 server yaad rakhta. JWT MAD2 client rakhta, server stateless-ish.
Example
```
eyJhbGciOiJIUzI1NiJ9.{"sub":1,"role":"admin"}.signature
# Authorization: Bearer <token>
```
Project example: POST /login → token LS. fetch interceptor header. @jwt_required APIs.
Viva tipAlgo HS256. Secret env var. jwt.io pe payload dikhao, secret public site pe mat paste.
24

- How does the data flow end-to-end for the admin summary API?

Times asked 2

Official solution

SimpleNayi booking flow: UI form/button → route POST → login_required → validate seats → insert Booking → commit → redirect/flash.
Suggested flowBrowser → Flask route → Auth → Business rules → SQLAlchemy → SQLite → Response template/JSON
25

- Where is the admin summary API call located in the code and the browser?

Times asked 2

Official solution

SimpleNayi booking flow: UI form/button → route POST → login_required → validate seats → insert Booking → commit → redirect/flash.
Suggested flowBrowser → Flask route → Auth → Business rules → SQLAlchemy → SQLite → Response template/JSON
26

- Where exactly is the API response data being used in the frontend?

Times asked 2

Official solution

SimpleMAD1 frontend usually Jinja templates + HTML/CSS/Bootstrap (+ thoda JS). MAD2 pe Vue ho to clearly bolo.
27

Frontend Organization

Times asked 2

Official solution

SimpleMAD1 frontend usually Jinja templates + HTML/CSS/Bootstrap (+ thoda JS). MAD2 pe Vue ho to clearly bolo.
28

- How are you handling child components?

Times asked 2

Official solution

SimpleParent-child: parent template mein child component. Props parent→child, emit child→parent.
29

- Where are you defining and importing child components (like the header bar)?

Times asked 2

Official solution

SimpleParent-child: parent template mein child component. Props parent→child, emit child→parent.
30

Live Coding and Troubleshooting

Times asked 2

Official solution

SimpleViva wrap-up hai. Short thanks + confirm submission ZIP latest hai.
31
- Can you create a new tab in the admin UI called "placed student" that prints only the student's name and their respective company?

Times asked 2
Official solution

SimpleLive UI change: relevant CSS/HTML template kholo — color, margin, flex, bootstrap class. Save + hard refresh.
Example
```
/* button red */
.btn-primary { background: red; }

/* center navbar item */
.navbar { justify-content: center; }
```
Viva tipDevTools se pehle try, phir file mein permanent change.
32
- There is an error in the application; can you identify the line and check what it is?

Times asked 2
Official solution

SimplePehle 1-line definition, phir apne MAD1 project mein file dikhao, phir chhota example.
Suggested flow1) Concept kya hai?
2) Mere code mein kahan?
3) Example / demo
4) Edge case
Example
```
# related file: models.py / routes / template
# formula: request → check/auth → DB → render/redirect
```
Viva tipExact line yaad nahi to honestly related part dikhao. Bluff mat karo.
33
- Is the "application details model view" present, and was it newly added?

Times asked 2
Official solution

Simplemodels.py = har table ki class: columns, PK/FK, relationships. Yeh Model layer hai.
Suggested flow1) Classes list karo
2) Har table ka kaam 1 line
3) Relationships (1-M / M-M)
4) Constraints (unique, nullable)
Example
```
class Lot(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(80), nullable=False)
    spots = db.relationship('Spot', backref='lot', lazy=True)
```
34
- Did you use a new route or an existing one for the new "placed student" tab?

Times asked 2
Official solution

SimpleLive UI change: relevant CSS/HTML template kholo — color, margin, flex, bootstrap class. Save + hard refresh.
Example
```
/* button red */
.btn-primary { background: red; }

/* center navbar item */
.navbar { justify-content: center; }
```
Viva tipDevTools se pehle try, phir file mein permanent change.
35

System Configuration and Tools

Times asked 2

Official solution

SimpleViva wrap-up hai. Short thanks + confirm submission ZIP latest hai.
36
- How did you set up Celery and Redis on your local system?

Times asked 2
Official solution

SimpleRedis box hai, Celery us box se kaam uthane wala worker hai — same cheez nahi.
Redis: store (cache keys) + queue (broker lists).
Celery: Python library jo tasks define karti hai, .delay() se queue mein daalti hai, worker execute karta hai.
Dono localhost pe ho sakte hain. Alag Redis DB index use karo. Redis band = cache miss + Celery stuck.
Example
```
Celery: broker_url='redis://localhost:6379/0'
Cache:  CACHE_REDIS_URL='redis://localhost:6379/1'
```
Project example: export_csv.delay(user_id) Flask se. Worker Redis se task uthata hai, CSV+email. Cache alag keys venues.
Viva tipAgar possible ho to cache db=1, broker db=0 — keys mix nahi hoti.
37
- What is the configuration for MailHog, and where did the localhost/port values come from?

Times asked 2
Official solution

SimpleMailHog local fake post office — email internet pe nahi jaata, browser mein dikhta hai.
SMTP 1025, Web UI 8025. Viva demo gold. Credentials nahi.
Real Gmail SMTP student accounts pe block common — MailHog safer.
Flask-Mail / SMTP se mail. Local MailHog fake server: SMTP 1025, UI 8025 — internet nahi, viva safe.
Asli send Celery task mein, request thread mein nahi. Beat 6pm reminder, export ke baad CSV attach optional.
MAIL_SERVER localhost demo. Gmail SMTP student account pe block common. Body mein user name personalization examiner dekhta hai.
Example
```
MAIL_SERVER=localhost
MAIL_PORT=1025
# http://localhost:8025
```
Project example: Reminder task → MailHog list → HTML body user name ke saath.
38
- What is the difference between a Celery worker and a Celery beat?

Times asked 2
Official solution

SimpleBeat clock hai, Worker haath hai. Clock kaam nahi karti, haath nahi sochte kab.
Worker: @celery.task execute. Beat: crontab padhke due time pe queue mein daal.
Sirf worker = scheduled nahi. Sirf beat = queue bhar jaaye, koi run nahi.
Dono ke saath redis-server. Logs mein 'Sending due task' Beat, 'Task succeeded' Worker.
Example
```
celery -A app.celery worker -l info
celery -A app.celery beat -l info
```
Project example: daily_reminder Beat 18:00. Worker MailHog. Export worker-only (button).
Viva tipSirf worker = scheduled jobs nahi chalenge. Sirf beat = queue bhar jaaye, koi run nahi karega.
39
- What steps did you follow to configure MailHog for the application?

Times asked 2
Official solution

SimpleMailHog local fake post office — email internet pe nahi jaata, browser mein dikhta hai.
SMTP 1025, Web UI 8025. Viva demo gold. Credentials nahi.
Real Gmail SMTP student accounts pe block common — MailHog safer.
Flask-Mail / SMTP se mail. Local MailHog fake server: SMTP 1025, UI 8025 — internet nahi, viva safe.
Asli send Celery task mein, request thread mein nahi. Beat 6pm reminder, export ke baad CSV attach optional.
MAIL_SERVER localhost demo. Gmail SMTP student account pe block common. Body mein user name personalization examiner dekhta hai.
Example
```
MAIL_SERVER=localhost
MAIL_PORT=1025
# http://localhost:8025
```
Project example: Reminder task → MailHog list → HTML body user name ke saath.
40
- Where did you get the specific server and port (1025) for mailing?

Times asked 2
Official solution

SimpleSMTP = Simple Mail Transfer Protocol — email bhejne ka standard. Flask-Mail / smtplib se reminders/reports.
Example
```
from flask_mail import Message
msg = Message('Subject', recipients=[user.email])
msg.body = 'Hello'
mail.send(msg)
```
Viva tipViva mein MailHog/inbox dikhao. Port 587 TLS common; local pe MailHog 1025.

Advice: She's super chill, Just know your code well, she wont ask same coding questions from sheet.. will ask to code anything but will help you to debug if needed

See reviews Level2_141 MAD1 Level 2

Aug 14, 2026

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1
Write registration route

Times asked 2
Official solution

SimpleLive Flask coding: chhota route likho, save, browser/curl se test. Syntax error terminal mein padho.
Example
```
@app.route('/ping')
def ping():
    return jsonify(ok=True)

@app.route('/even/<int:n>')
def even(n):
    return 'even' if n % 2 == 0 else 'odd'
```
2
Jwt and RBAC and show jwt stored area

Times asked 2
Official solution

SimpleRBAC = Role Based Access Control. Roles (admin/user) se permissions milti hain, har user pe alag list nahi.
Example
```
if current_user.role != 'admin':
    flash('Not allowed')
    return redirect(url_for('user.home'))
```
3

Why asynchronous and awaits are used

Times asked 2

Official solution

SimpleSync line pe ruk jao (2+2). Async I/O pe wait karte hue baaki kaam chalte (fetch, Celery).
JS async ≠ Celery async jobs. Context se bolo.
Why async jobs: slow/scheduled/bulk off request thread.
Pehle 1-line definition, phir related MAD2 layer (Vue SFC / Flask route / models.py / tasks.py / Redis).
4-line formula: input kahan se aaya, auth/validation kaunsa, DB ya cache ya Celery, kya return.
Related mix mat karo — cache ≠ Celery, authentication ≠ authorization, v-if ≠ v-show, Beat ≠ Worker. Follow-up ke liye ek difference ready rakho.
Project example: Login sync hash check fast. Email Celery async. Vue fetch async.
4

How https works are they secure

Times asked 2

Official solution

SimpleCode explain formula: input kya aaya → auth/validation → DB change → response/UI.
Viva tipFunction signature + 3-4 important lines + edge case.
5
Vue lifecycle hooks

Times asked 4
Official solution

SimpleLifecycle = component ki zindagi ke stages. API call tab jab DOM ready ho — mounted.
created: instance bani, this data, DOM nahi. mounted/onMounted: page pe aa gaya — fetch, Chart.js, setInterval.
updated: data change ke baad. unmounted: cleanup (clearInterval) warna memory leak.
Dashboards onMounted isliye: canvas/API tab valid. created mein $el nahi.
Composition: onMounted(() => {}) setup ke andar.
Example
```
export default {
  async mounted() {
    const r = await fetch('/api/venues')
    this.venues = await r.json()
  }
}
```
Project example: Venues.vue mounted fetch list. Clock component unmounted pe interval clear.
Viva tipcreated: data setup, DOM nahi. mounted/onMounted: $el mil gaya — fetch yahi. Dashboards isliye onMounted use karti hain.

Advice: Be calm the proctor is very cool and give pointers if u were to fumble in the middle

See reviews APPDEV_LEVEL1_VIVA18 MAD1 Level 1

Aug 14, 2026

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1

- mid demo -> route that gives treks that are fully booked (available_slots=0)

Times asked 2

Official solution

SimpleDemo script pehle se practice: 5–7 min, Admin + User roles, saare mandatory features.
Suggested flow1) Register/login user
2) Admin login — CRUD
3) Approval/blacklist
4) Booking/apply + edge case
5) Search
6) Logout
Viva tipBolte-bolte dikhao. Code tab kholna jab poochhein.
2
- relationship between trek and staff (many to 1)

Times asked 2
Official solution

Simpledb.relationship se object graph: lot.spots, booking.user. backref reverse side auto deta hai.
Example
```
spots = db.relationship('Spot', backref='lot', cascade='all, delete-orphan')
```
3

- libraries used

Times asked 2

Official solution

SimpleStack bolo: Python, Flask, Jinja2, SQLAlchemy, SQLite, HTML/CSS/Bootstrap, maybe Chart.js.
4

- show scheduled jobs (can change time in the code for demo)

Times asked 2

Official solution

SimpleDemo script pehle se practice: 5–7 min, Admin + User roles, saare mandatory features.
Suggested flow1) Register/login user
2) Admin login — CRUD
3) Approval/blacklist
4) Booking/apply + edge case
5) Search
6) Logout
Viva tipBolte-bolte dikhao. Code tab kholna jab poochhein.
5

that's it

Times asked 3

Official solution

SimpleViva wrap-up hai. Short thanks + confirm submission ZIP latest hai.

Advice: all the best, supportive proctor, gives feedback and is patient.

See reviews appdev_level1_viva30 MAD1 Level 1

Aug 14, 2026

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1
Ask to write model for User

Times asked 2
Official solution

Simplemodels.py = har table ki class: columns, PK/FK, relationships. Yeh Model layer hai.
Suggested flow1) Classes list karo
2) Har table ka kaam 1 line
3) Relationships (1-M / M-M)
4) Constraints (unique, nullable)
Example
```
class Lot(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(80), nullable=False)
    spots = db.relationship('Spot', backref='lot', lazy=True)
```
2

Ask to show git repository

Times asked 2

Official solution

SimpleGitHub repo public/private policy ke hisaab, MAD-1 collaborator add, commits dikhao.
Repo → Settings → Collaborators → instructor added.
Commits: git log / GitHub History — regular commits better, ek dum 1 commit suspicious.
README + report mein AI usage likha hona chahiye agar use kiya.

Advice: Focus on coding questions and he don't disturb when I demonstrate my project.

See reviews LEVEL1_VIVA7 MAD1 Level 1

Aug 14, 2026

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1
- What is v-model, how have you used it in your project

Times asked 2
Official solution

Simplemodels.py = har table ki class: columns, PK/FK, relationships. Yeh Model layer hai.
Suggested flow1) Classes list karo
2) Har table ka kaam 1 line
3) Relationships (1-M / M-M)
4) Constraints (unique, nullable)
Example
```
class Lot(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(80), nullable=False)
    spots = db.relationship('Spot', backref='lot', lazy=True)
```
2
- What are the different components of Vue

Times asked 2
Official solution

SimpleVue = UI ka smart assistant. Data badlo, screen khud update. MAD1 Jinja har click pe naya HTML.
Progressive frontend framework. Components, reactivity, directives.
MAD2 SPA: ek index.html, Vue Router pages, Flask sirf JSON.
Fayde: easy, SFC, docs. Vs React: templates HTML-like, course sikhata hai. Vs plain JS: baar-baar DOM mat chhedo.
Example
```

<template>
  <h1>{{ msg }}</h1>
</template>
<script>
export default { data() { return { msg: 'Hello' } } }
</script>
```
Project example: Navbar.vue + views (Login, Dashboard). data() / setup() reactive. fetch APIs.
Viva tipFayde: easy, SFC, reactivity. Vs React: chhota learning curve. Vs plain JS: UI state auto-update.
3

- Point to specific functions or elements in your codebase

Times asked 2

Official solution

SimpleCode dikhao to pehle related file: models → route → template. Flow explain karte hue lines padho.
4

- If you remove a certain element from your frontend, how will your UI react/be visible

Times asked 2

Official solution

SimpleMAD1 frontend usually Jinja templates + HTML/CSS/Bootstrap (+ thoda JS). MAD2 pe Vue ho to clearly bolo.
5
- Where do you store the values momentarily typed in any search box on your webpage

Times asked 2
Official solution

SimpleSearch: form/query param → ilike filter → results template.
Example
```
q = request.args.get('q', '').strip()
lots = Lot.query.filter(Lot.name.ilike(f'%{q}%')).all()
```
6

- Define a new route in backend and connect it with frontend with POST functionality

Times asked 2

Official solution

SimpleMAD1 frontend usually Jinja templates + HTML/CSS/Bootstrap (+ thoda JS). MAD2 pe Vue ho to clearly bolo.
7
- Explain the flow of actions when you write a search query andf press submit on your website

Times asked 2
Official solution

SimpleSearch: form/query param → ilike filter → results template.
Example
```
q = request.args.get('q', '').strip()
lots = Lot.query.filter(Lot.name.ilike(f'%{q}%')).all()
```

Advice: Very rude examiner Always in a rush Highly uncooperative and doesnt listen to any explanation if you fumble even a bit If you cant answer a question, keeps increasing difficulty level of the next ones My project was on placement portal and he was asking me questions wrt trekking app Gives you extra gyaan if you dont know anything, like why didnt you study the course, why you dont know this line of code, how much did you score in theory, what grade did you get in MAD-1, etc. etc

See reviews PROCTOR808 MAD1 Level 1

Aug 14, 2026

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1

Did not even ask for a demo

Times asked 2

Official solution

SimpleDemo script pehle se practice: 5–7 min, Admin + User roles, saare mandatory features.
Suggested flow1) Register/login user
2) Admin login — CRUD
3) Approval/blacklist
4) Booking/apply + edge case
5) Search
6) Logout
Viva tipBolte-bolte dikhao. Code tab kholna jab poochhein.
2

Coding:

Times asked 6

Official solution

SimpleTheory = concepts: ORM, MVC, auth vs authz, Jinja inheritance, sessions. 1-line def + project example.
3
1. A route in flask to check if a number is even or odd

Times asked 2
Official solution

SimpleLive Flask coding: chhota route likho, save, browser/curl se test. Syntax error terminal mein padho.
Example
```
@app.route('/ping')
def ping():
    return jsonify(ok=True)

@app.route('/even/<int:n>')
def even(n):
    return 'even' if n % 2 == 0 else 'odd'
```
4

2.Make an input box with a submit button on the side the submit button must be disabled if the number in input is >15

Times asked 2

Official solution

SimpleViva wrap-up hai. Short thanks + confirm submission ZIP latest hai.
5

Theory:

Times asked 8

Official solution

SimpleTheory = concepts: ORM, MVC, auth vs authz, Jinja inheritance, sessions. 1-line def + project example.
6
3.What are triggers in db

Times asked 2
Official solution

SimpleIndex = column pe shortcut book — WHERE/JOIN tez. PK auto-indexed. Email/unique filters pe index socho.
Example
```
email = db.Column(db.String(120), unique=True, index=True)
```
7

4.What is normalisation

Times asked 2

Official solution

SimpleNormalisation: redundant data kam, tables todna. 1NF atomic, 2NF partial dep hatao, 3NF transitive dep hatao.
Viva tip
Exampleuser address alag table vs har booking mein dubara store.
8

5.What is BCNF

Times asked 2

Official solution

SimpleNormalisation: redundant data kam, tables todna. 1NF atomic, 2NF partial dep hatao, 3NF transitive dep hatao.
Viva tip
Exampleuser address alag table vs har booking mein dubara store.
9

4.Dijkstra algorithm

Times asked 2

Official solution

SimpleDijkstra shortest path in weighted graph (non-negative). Priority queue + distances. Parking app se related nahi usually — algo side Q.
10
5.Time complexity and 3 notations

Times asked 2
Official solution

SimpleTime complexity input size ke saath time kaise badhta hai.
O(1): dict lookup. O(n): list mein loop. O(n^2): nested loops.
Example
```
User.query.all() phir Python mein filter = O(n). DB pe indexed WHERE tez.
```
Search suggestions: prefix index / ILIKE, nai to har keypress pe poori table mat ghumao.
11
6.Class and style binding

Times asked 2
Official solution

Simple:class object/array/string dynamic CSS.
Purpose dynamic class. Error red.
Directives Vue ke special attributes hain — HTML ko superpower: v-if/v-show, v-for, v-bind (:), v-on (@), v-model.
v-if DOM se hataata/jodta. v-show sirf CSS display. Rare/permission: v-if. Bar-bar toggle: v-show. v-model two-way form. v-bind one-way JS→attribute.
:key v-for pe zaroori warna Vue galat reuse. v-html XSS. Secret UI ke liye sirf v-if kaafi nahi — API 403 bhi.
MAD1 Jinja server HTML. MAD2 yeh directives browser mein reactive.
Example
```
<div :class="{ 'text-danger': error, 'fw-bold': important }">Msg</div>
```
Project example: :class="{ 'text-danger': error }"
12
7.What is the flow of the generation of the monthly report from vue to flask

Times asked 2
Official solution

SimpleFlask lightweight Python web framework — routes, request/response, templates. MAD1 ka backend yahi hai.
Example
```
from flask import Flask
app = Flask(__name__)

@app.route('/')
def home():
    return 'Hello'
```
Viva tipFlask micro hai: jo chahiye (DB, login, forms) khud jodte ho.
13
8.How is flask and celery connected

Times asked 2
Official solution

SimpleFlask lightweight Python web framework — routes, request/response, templates. MAD1 ka backend yahi hai.
Example
```
from flask import Flask
app = Flask(__name__)

@app.route('/')
def home():
    return 'Hello'
```
Viva tipFlask micro hai: jo chahiye (DB, login, forms) khud jodte ho.
14

9.What is CSRF

Times asked 2

Official solution

SimpleCSRF: attacker tumhari logged-in browser se unwanted POST. CSRF token form mein proof hai request genuine hai.
Viva tipFlask-WTF CSRF protect karta hai. Token bina POST reject.

Advice: Not strict

See reviews appdev_level1_viva30 MAD1 Level 1

Aug 14, 2026

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1

project demonstration took around 17-20 minutes

Times asked 2

Official solution

SimpleDemo script pehle se practice: 5–7 min, Admin + User roles, saare mandatory features.
Suggested flow1) Register/login user
2) Admin login — CRUD
3) Approval/blacklist
4) Booking/apply + edge case
5) Search
6) Logout
Viva tipBolte-bolte dikhao. Code tab kholna jab poochhein.
2

what is payload

Times asked 1

Official solution

SimplePayload = dabba ke andar samaan (body). JWT payload beech wala claims (encrypted nahi).
POST haan JSON. GET query string. JWT payload vs HTTP payload alag context.
HTTP verbs + status REST ki zabaan. GET read, POST create, PUT replace, PATCH partial, DELETE remove. GET typically no body.
Status: 200 OK, 201 created, 202 accepted (Celery task), 400 bad input, 401 no/bad token, 403 role nahi, 404 missing, 409 conflict (double book), 500 server.
AJAX/fetch page reload nahi. SPA poori isi pe. Postman se bina Vue ke API prove karo — examiner pasand.
Project example: request.get_json() create venue. Token payload user id jwt.io.
3

does GET have payload

Times asked 1

Official solution

SimpleViva wrap-up hai. Short thanks + confirm submission ZIP latest hai.
4
write login route (less time so just started asking questions instead)

Times asked 2
Official solution

SimpleLive Flask coding: chhota route likho, save, browser/curl se test. Syntax error terminal mein padho.
Example
```
@app.route('/ping')
def ping():
    return jsonify(ok=True)

@app.route('/even/<int:n>')
def even(n):
    return 'even' if n % 2 == 0 else 'odd'
```
5
what is SQLAlchemy

Times asked 3
Official solution

SimpleSQLAlchemy Python ka sabse popular ORM hai. MAD1 mein Flask-SQLAlchemy wrapper use hota hai.
db = SQLAlchemy(app)
```
class Book(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    title = db.Column(db.String(80), nullable=False)

Operations: db.session.add(obj), .commit(), .delete(obj), Model.query.all(), .filter_by(), .get_or_404(id).
db.Model ek class hai (function nahi). db object engine + session + metadata hold karta hai.
```
SQLALCHEMY_TRACK_MODIFICATIONS=False extra signals band karta hai, performance warning hatati hai.
6
what is ORM

Times asked 1
Official solution

SimpleORM = Object Relational Mapping. Database tables ko Python classes/objects se map karta hai, raw SQL kam likhni padti hai.
Bina ORM: cursor.execute('SELECT * FROM user WHERE id=?', [5])
ORM se: User.query.get(5) ya db.session.get(User, 5)
Example model
```
class User(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    email = db.Column(db.String(120), unique=True)
```
FaydePython mein soch sakte ho, SQL injection se protection (parameterized), relationships easy, DB switch thoda aasan.
Nuksaancomplex queries slow/abstract, seekhne ki layer extra, kabhi raw SQL phir bhi chahiye.
MAD1: SQLAlchemy (Flask-SQLAlchemy). Tables db.create_all() ya migrations se banti hain.
7
have you used ORM

Times asked 2
Official solution

SimpleORM = Object Relational Mapping. Tables → Python classes. Raw SQL kam likhte ho.
Example
```
class User(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    email = db.Column(db.String(120), unique=True)

User.query.get(5)  # SELECT ... WHERE id=5
```
8
show commits on git

Times asked 2
Official solution

Simplecommit changes save. rollback fail pe undo. Transaction consistency ke liye.
Example
```
try:
    db.session.add(obj)
    db.session.commit()
except Exception:
    db.session.rollback()
    raise
```
9

how much percentage was done via ai

Times asked 2

Official solution

SimpleCode explain formula: input kya aaya → auth/validation → DB change → response/UI.
Viva tipFunction signature + 3-4 important lines + edge case.

Advice: does not respond that much, neither corrects your answer. take your time with the demo.

See reviews Level2_141 MAD1 Level 2

Aug 14, 2026

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1
2.async and awaiting

Times asked 2
Official solution

Simpleasync function promise return karti hai. await us promise ka result wait karta hai — callback hell kam.
Example
```
async function loadLots() {
  const res = await fetch('/api/lots');
  const data = await res.json();
  return data;
}
```
2

3.register route in notepad

Times asked 2

Official solution

SimpleViva wrap-up hai. Short thanks + confirm submission ZIP latest hai.
3
Very friendly understand and go with the student

Times asked 2
Official solution

SimplePehle 1-line definition, phir apne MAD1 project mein file dikhao, phir chhota example.
Suggested flow1) Concept kya hai?
2) Mere code mein kahan?
3) Example / demo
4) Edge case
Example
```
# related file: models.py / routes / template
# formula: request → check/auth → DB → render/redirect
```
Viva tipExact line yaad nahi to honestly related part dikhao. Bluff mat karo.

Advice: Be cool study the question which are previous and make sure getting no error while running the app

See reviews Level3_49 MAD1 Level 3

Aug 14, 2026

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1
Can everything you did in your app be done without using vue.js using plain js

Times asked 2
Official solution

SimpleVue = UI ka smart assistant. Data badlo, screen khud update. MAD1 Jinja har click pe naya HTML.
Progressive frontend framework. Components, reactivity, directives.
MAD2 SPA: ek index.html, Vue Router pages, Flask sirf JSON.
Fayde: easy, SFC, docs. Vs React: templates HTML-like, course sikhata hai. Vs plain JS: baar-baar DOM mat chhedo.
Example
```

<template>
  <h1>{{ msg }}</h1>
</template>
<script>
export default { data() { return { msg: 'Hello' } } }
</script>
```
Project example: Navbar.vue + views (Login, Dashboard). data() / setup() reactive. fetch APIs.
Viva tipFayde: easy, SFC, reactivity. Vs React: chhota learning curve. Vs plain JS: UI state auto-update.
2
Substitute of (vue directives) in plain JS, as in - instead of using v-if, hover etc how will you implement stuff without that using only plain JS

Times asked 2
Official solution

SimpleDirectives Vue ke special attributes — HTML ko superpower.
v-if/else/show, v-for, v-bind (:), v-on (@), v-model, v-html (XSS), v-cloak, v-slot.
:src = v-bind:src. @click = v-on:click.
Custom directives bhi (v-focus) — course basics kaafi.
Example
```
<p v-if="ok">Yes</p>
<li v-for="u in users" :key="u.id">{{ u.name }}</li>
<input v-model="email">
<img :src="url">
```
Project example: List v-for :key. Form v-model. Admin v-if. Image :src.
Viva tip: src ke liye v-bind:src ka shorthand. @click = v-on:click.
3

What is DOM, what functionalities does it provide us with instead of just rendering html

Times asked 2

Official solution

SimpleDOM HTML tree. JS nodes change. Vue Virtual DOM ke through, direct kam.
Manipulation innerHTML vs Vue data. Remove CSS class = rules gone layout may collapse.
Pehle 1-line definition, phir related MAD2 layer (Vue SFC / Flask route / models.py / tasks.py / Redis).
4-line formula: input kahan se aaya, auth/validation kaunsa, DB ya cache ya Celery, kya return.
Related mix mat karo — cache ≠ Celery, authentication ≠ authorization, v-if ≠ v-show, Beat ≠ Worker. Follow-up ke liye ek difference ready rakho.
Project example: Inspect Elements. Vue devtools.
4
Have you used vue cli or cdn

Times asked 2
Official solution

SimpleCDN = Vue script tag se, jaise pen drive. CLI/Vite = poori factory (SFC, npm, bundle).
CDN: no build, chhote apps, exam PC pe Node nahi to bhi chal. Weak: no .vue compile, 3rd-party cache, scale/team.
CLI/Vite: Single File Components, env, code-split, production dist/. Scalable.
Examiner 'which + why' — jo use kiya wahi justify, doosra naam rato mat.
Example
```

<script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>

# Vite
npm run dev
npm run build
```
Project example: CDN: index.html unpkg vue. CLI: package.json, npm run serve / vite.
Viva tipCDN scalable large teams ke liye weak (no SFC compile, caching 3rd party). Examiner 'which + why' poochta hai — jo use kiya wahi justify karo.
5
What communication protocol is used to communicate between 2 servers? (Python Flask and Vue)

Times asked 1
Official solution

SimpleFlask lightweight Python web framework — routes, request/response, templates. MAD1 ka backend yahi hai.
Example
```
from flask import Flask
app = Flask(__name__)

@app.route('/')
def home():
    return 'Hello'
```
Viva tipFlask micro hai: jo chahiye (DB, login, forms) khud jodte ho.
6
What is HTTP, name HTTP methods and what they are used for

Times asked 2
Official solution

SimpleHTTP verbs REST ke tools. Methods HTTP ke hain, REST unhe convention se use karta hai.
GET read cacheable. POST create payload. PUT replace. PATCH patch. DELETE remove.
GET exists bina REST ke bhi — browser address bar.
HTTP verbs + status REST ki zabaan. GET read, POST create, PUT replace, PATCH partial, DELETE remove. GET typically no body.
Status: 200 OK, 201 created, 202 accepted (Celery task), 400 bad input, 401 no/bad token, 403 role nahi, 404 missing, 409 conflict (double book), 500 server.
AJAX/fetch page reload nahi. SPA poori isi pe. Postman se bina Vue ke API prove karo — examiner pasand.
Example
```
GET /api/venues
POST /api/venues
PUT /api/venues/1
DELETE /api/venues/1
```
Project example: resources.py methods list. Postman 4-5 calls.
Viva tipGET typically no body (cacheable). POST/PUT/PATCH haan payload. PUT idempotent, POST nahi.
7
Can you send data in POST request body, can you do it in all methods? should you do it all methods, what methods should not have data in request body?

Times asked 2
Official solution

SimplePehle 1-line definition, phir apne MAD1 project mein file dikhao, phir chhota example.
Suggested flow1) Concept kya hai?
2) Mere code mein kahan?
3) Example / demo
4) Edge case
Example
```
# related file: models.py / routes / template
# formula: request → check/auth → DB → render/redirect
```
Viva tipExact line yaad nahi to honestly related part dikhao. Bluff mat karo.
8
Celery and Redis , Do we always need to store the cached results in index 1 of redis ?

Times asked 2
Official solution

SimpleRedis box hai, Celery us box se kaam uthane wala worker hai — same cheez nahi.
Redis: store (cache keys) + queue (broker lists).
Celery: Python library jo tasks define karti hai, .delay() se queue mein daalti hai, worker execute karta hai.
Dono localhost pe ho sakte hain. Alag Redis DB index use karo. Redis band = cache miss + Celery stuck.
Example
```
Celery: broker_url='redis://localhost:6379/0'
Cache:  CACHE_REDIS_URL='redis://localhost:6379/1'
```
Project example: export_csv.delay(user_id) Flask se. Worker Redis se task uthata hai, CSV+email. Cache alag keys venues.
Viva tipAgar possible ho to cache db=1, broker db=0 — keys mix nahi hoti.
9
Asked if i did background jobs, I said yes., so he asked 3 different servers - celery, flask, vite - how do they interact with each other in your project ?

Times asked 2
Official solution

SimpleFlask lightweight Python web framework — routes, request/response, templates. MAD1 ka backend yahi hai.
Example
```
from flask import Flask
app = Flask(__name__)

@app.route('/')
def home():
    return 'Hello'
```
Viva tipFlask micro hai: jo chahiye (DB, login, forms) khud jodte ho.
10

Give me a quick overview of all the files and folders in your project,

Times asked 2

Official solution

SimpleRoutes/controllers URLs handle karte hain. app.py app banata hai, models.py data, templates/ views, static/ CSS-JS.
Typical structure:
app.py / __init__.py → Flask app, db.init, register blueprints
models.py → tables
routes.py / views → @app.route functions
templates/ → Jinja HTML
static/ → css, images
instance/*.db → SQLite
Ek route explain karne ka template:
1) URL + methods 2) Auth/role check 3) Form/query se data 4) Business rule (duplicate, slots) 5) db.session 6) render ya redirect
Example GET+POST same route: GET form, POST save.
Data HTML se: form name= → request.form. Data HTML ko: render_template(..., items=query).
Nayi .py file: import karke use karo, warna Flask ko pata nahi. Folder rename: imports/paths/templates check.
11
what are __init__.py files in your project ? is there a way to export files are packages without using __init__.py

Times asked 2
Official solution

SimplePehle 1-line definition, phir apne MAD1 project mein file dikhao, phir chhota example.
Suggested flow1) Concept kya hai?
2) Mere code mein kahan?
3) Example / demo
4) Edge case
Example
```
# related file: models.py / routes / template
# formula: request → check/auth → DB → render/redirect
```
Viva tipExact line yaad nahi to honestly related part dikhao. Bluff mat karo.
12

i had enums in my project so he asked what is the use of ENUMS, what are ENUMS

Times asked 1

Official solution

SimpleENUM allowed values set. App-level choices bhi. Status pending/approved.
What are ENUMs.
Pehle 1-line definition, phir related MAD2 layer (Vue SFC / Flask route / models.py / tasks.py / Redis).
4-line formula: input kahan se aaya, auth/validation kaunsa, DB ya cache ya Celery, kya return.
Related mix mat karo — cache ≠ Celery, authentication ≠ authorization, v-if ≠ v-show, Beat ≠ Worker. Follow-up ke liye ek difference ready rakho.
Project example: status string with check or Enum.
Project example: status string with check or Enum.
13
How to limit password to 13 letters long [in the database, not frontend or backend validation]

Times asked 2
Official solution

SimpleValidation = input rules: required, email format, length, unique. Frontend UX, backend security — dono.
Example
```
if not email or '@' not in email:
    flash('Invalid email')
    return redirect(request.url)
if User.query.filter_by(email=email).first():
    flash('Email taken')
```
14
__tablename__ -> is it needed, if we comment out all the table names, should it work or not?

Times asked 2
Official solution

Simple__tablename__ explicit. Hatao class→user auto. Explicit rename/legacy better.
Is it mandatory? No. Why use: control name reserved stable migrations. Remove → autogenerate maybe change.
Pehle 1-line definition, phir related MAD2 layer (Vue SFC / Flask route / models.py / tasks.py / Redis).
4-line formula: input kahan se aaya, auth/validation kaunsa, DB ya cache ya Celery, kya return.
Related mix mat karo — cache ≠ Celery, authentication ≠ authorization, v-if ≠ v-show, Beat ≠ Worker. Follow-up ke liye ek difference ready rakho.
Example
```
class User(db.Model):
    __tablename__ = 'users'
```
Project example: class User __tablename__='users'.
15
Authentication -> session based or token based, (i had session based so he asked how does session based authentication work?)

Times asked 1
Official solution

SimpleMAD1 mein usually session-based auth: login pe session['user_id'], har request pe verify.
Example
```
session['user_id'] = user.id
uid = session.get('user_id')
user = User.query.get(uid)
```
Viva tipSECRET_KEY set karo warna session insecure. logout pe session.clear().
16
What are vue directives, purpose of vue directives, vue life cycle hooks,

Times asked 1
Official solution

SimpleDirectives Vue ke special attributes — HTML ko superpower.
v-if/else/show, v-for, v-bind (:), v-on (@), v-model, v-html (XSS), v-cloak, v-slot.
:src = v-bind:src. @click = v-on:click.
Custom directives bhi (v-focus) — course basics kaafi.
Example
```
<p v-if="ok">Yes</p>
<li v-for="u in users" :key="u.id">{{ u.name }}</li>
<input v-model="email">
<img :src="url">
```
Project example: List v-for :key. Form v-model. Admin v-if. Image :src.
Viva tip: src ke liye v-bind:src ka shorthand. @click = v-on:click.
17
Use of vue life cycle hooks, how do they help us as developers, and how do they help in User experience (one good thing it enables as developers and one good thing it enables as users)

Times asked 2
Official solution

SimpleVue = UI ka smart assistant. Data badlo, screen khud update. MAD1 Jinja har click pe naya HTML.
Progressive frontend framework. Components, reactivity, directives.
MAD2 SPA: ek index.html, Vue Router pages, Flask sirf JSON.
Fayde: easy, SFC, docs. Vs React: templates HTML-like, course sikhata hai. Vs plain JS: baar-baar DOM mat chhedo.
Example
```

<template>
  <h1>{{ msg }}</h1>
</template>
<script>
export default { data() { return { msg: 'Hello' } } }
</script>
```
Project example: Navbar.vue + views (Login, Dashboard). data() / setup() reactive. fetch APIs.
Viva tipFayde: easy, SFC, reactivity. Vs React: chhota learning curve. Vs plain JS: UI state auto-update.
18
Asked to open the application, asked me to login. http://localhost:8080/#/login -> this was the URL asked what is that "#" where is it coming from, from where will you change it ?

Times asked 2
Official solution

SimpleLive UI change: relevant CSS/HTML template kholo — color, margin, flex, bootstrap class. Save + hard refresh.
Example
```
/* button red */
.btn-primary { background: red; }

/* center navbar item */
.navbar { justify-content: center; }
```
Viva tipDevTools se pehle try, phir file mein permanent change.
19

In the admin dashboard I had stats shown on cards, asked me to show the frontend and backend part that handles it and asked me to explain the api endpoint for it

Times asked 2

Official solution

SimpleMAD1 frontend usually Jinja templates + HTML/CSS/Bootstrap (+ thoda JS). MAD2 pe Vue ho to clearly bolo.
20
what does jsonify do ?

Times asked 1
Official solution

Simplejsonify Python dict/list ko JSON response + proper Content-Type deta hai.
Example
```
return jsonify(message='ok', count=3), 200
```
21
Asked to register as company (Backend only): If there are no companies register and company name is "AppDevTeam" then they should not be able to register as company (if they are the first one to register they should not be able to do it), print the error in the terminal "Cannot register"

Times asked 2
Official solution

SimpleInt column mein string daalne pe SQLAlchemy/DB type error ya Integrity/StatementError. Empty table pe bhi same validation fail — row count matter nahi.
Example
```
# SQLite may coerce sometimes; Postgres: invalid input syntax for integer
Spot(status='free', lot_id='abc')  # lot_id int → error
```
22

Asked me to show the error in the terminal (I returned a message with a 404 status code, he asked me to show it in the developer console)

Times asked 2

Official solution

SimpleStatus code server ka result: 200 OK, 302 redirect, 400 bad input, 401/403 auth, 404 not found, 500 server error.
23

what logical change did you have to add to existing code to make this work At the end, he asked me if I have any questions for him, I asked him for feedback

Times asked 2

Official solution

SimpleViva wrap-up hai. Short thanks + confirm submission ZIP latest hai.

Advice: Know each and every single thing in your project, even the minute details, he can ask you anything unexpected.

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