Lazy IITians – Viva Prep

Aug 14, 2026

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1
Joined 10 mins early, i too joined (35-40 mins)

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()
```
2
As soon as i joined, he started we will follow a structure - while you download and setup your app, i will keep asking the questions, will keep asking till your setup completes(took 20 mins due to this) - then the rapid fire:

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()
```
3

In context of cli there is a notion of npm - what is npm

Times asked 1

Official solution

Simplenpm Node package manager. package.json scripts/deps. node_modules folder.
Not inside venv. Python pip alag. lockfile versions.
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: npm install. scripts dev/build.
Viva tipnode_modules venv ke andar nahi — project root pe. Python venv alag, npm alag.
4
Explain how flask handles the request from the moment it arrives till it sends the response

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.
5
How does flask decide which function to execute(he expected wsgi to be mentioned - i didn't)

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.
6
explicitly asked WSGI. if you knew why didn't you mention

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.
7

rolemixin and usermixin. how is token generated? diff between fs_uniquifier and fs_uniquifier tokens

Times asked 2

Official solution

Simplefs_uniquifier session/token invalidate string. Password change → naya → purane mar.
Auth JWT alag. fs vs JWT token confuse mat.
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: User model column. Password reset flow.
8

what happens to fs_uniquifier token when a user changes password

Times asked 2

Official solution

Simplefs_uniquifier session/token invalidate string. Password change → naya → purane mar.
Auth JWT alag. fs vs JWT token confuse mat.
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: User model column. Password reset flow.
9
SMTP

Times asked 1
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.
10

CSRF

Times asked 2

Official solution

SimpleCSRF = Cross-Site Request Forgery — logged-in user ke browser se attacker site hidden form submit karwati hai.
FixCSRF token hidden field, server verify. Flask-WTF: {{ form.hidden_tag() }}
SameSite cookies bhi help. GET pe destructive action mat rakho.
11

Client Side scripting

Times asked 2

Official solution

SimpleClient storage: cookies, localStorage, sessionStorage, IndexedDB. Tokens often localStorage; sessions often cookie.
12
Redis. Data structure in which redis stores data

Times asked 1
Official solution

Simpledata() local diary. Store school notice board.
Search query local. Logged-in user store. Persist: store + localStorage together.
state vs data: similar concept, scope alag.
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
```
// local
data() { return { q: '' } }
// global
this.$store.state.user
```
Project example: Login.vue local form fields. this.$store.state.user Navbar.
13
When will vue fail to detect changes in the reactive data properties

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.
14
Computed properties and watchers

Times asked 1
Official solution

SimpleComputed naya value return. Watcher side effect (API, log) jab value change.
Search debounce, route param change → watch. Display filter → computed.
Confusion examiner favourite.
Component = reusable UI block (Navbar, Card). Props parent→child data, emit child→parent event. Slots parent HTML inner content.
computed cache + reactive derive (filtered list). watch side-effect (query change pe API). methods events. ref() primitive, reactive() object. Vuex/Pinia global store; localStorage persist, store nahi.
SFC: template + script + style ek .vue file. Parent-child exam favourite: list parent, row child :item + @delete.
Example
```
watch: {
  query(newQ) { this.fetchSearch(newQ) }
}
```
Project example: q watch → fetchSearch. remainingSeats computed from capacity-booked.
15
v-if and v-show(by this time he was really enjoying asking the questions)

Times asked 2
Official solution

Simplev-if ghar se nikaal deta hai (DOM se). v-show sirf light band karta hai (display:none).
v-if false → element exist hi nahi — costly create/destroy, lekin secret HTML DOM mein nahi.
v-show → hamesha DOM, CSS hide, toggle tez.
Rare / permission UI: v-if (admin panel). Dropdown bar-bar: v-show.
: shorthand v-bind ka, v-if ka nahi.
Example
```
<div v-if="isAdmin">Admin panel</div>
<div v-show="open">Dropdown</div>
```
Project example: Admin links v-if="role==='admin'". FAQ accordion v-show="open".
Viva tipSecurity ke liye sirf v-if kaafi nahi — API 403 bhi chahiye.
16
many other questions were there

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.
17
Write a component with 1 input and 1 button it accepts 1 integer in the url 'a' when the button is clicked the output is printed on the console

Times asked 2
Official solution

SimpleNaya Flask route: URL, method, auth if needed, query, jsonify. Postman pehle.
Examiner number/filter change easy rakhna. CORS. Frontend tabhi jab bole.
Status codes sahi. Password JSON mein nahi.
Examiner 2 cheezein: simple desi line + tumhare project ki exact file.
Pehle ID, GitHub, portal ZIP. Phir run: Redis + Flask + worker + beat + Vue. Feature demo: login, RBAC, cache hit/miss, Celery mail, search.
Line pe ungli: input kahan, kaunsa check, query/cache/task, JSON/UI. Copilot band. Jo nahi kiya honestly bolo + kaise add karte.
Example
```
@app.route('/api/sum', methods=['POST'])
def sum_num():
    d = request.get_json()
    return jsonify(result=d['a'] + d['b'])
```
Project example: resources.py new Resource. Test Thunder. Optional Vue fetch.
18
Write an api to execute a celery task 'viva_celery_task' and query the db for the appointments in past 'a' and return in json format

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
```

Advice: Just hope that you don't get this proctor. If you do, you need to have an in-depth theory knowledge as well as how to write code. He was joking in between and not rude but kept the pressure on and asked questions in real detail. All the best if you get him

See reviews Level3_24 MAD1 Level 3

Aug 14, 2026

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1

level2

Times asked 4

Official solution

SimpleLevel = viva difficulty band. Level 1 usually demo + basics; higher pe live coding + deeper theory.
Viva tipJo level assign hai uske hisaab se demo + theory ready rakho.
2
take your time and run it

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.
3

second, he says to go through code and explain it,

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

after 40 minutes, he asks some 3-4 questions

Times asked 2

Official solution

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

thats it, these are the questions

Times asked 2

Official solution

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

Advice: Proctor is very chill and he gives the answer for those, which i didn't answer. and make sure go through this sheet. This sheet helps me a lot.

See reviews APPDEV_LEVEL1_VIVA14 MAD1 Level 1

Aug 14, 2026

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1

NEED NOT BE IN ORDER (Based on Placement Portal App)

Times asked 2

Official solution

SimpleLevel = viva difficulty band. Level 1 usually demo + basics; higher pe live coding + deeper theory.
Viva tipJo level assign hai uske hisaab se demo + theory ready rakho.
2
Show github profile and colaborators (Didn't check my ID)

Times asked 2
Official solution

SimpleGitHub repo open karo: commits, collaborators, README. Examiner check karta hai tumne khud kaam kiya.
Example
```
Settings → Collaborators
Commits: regular messages, last-day dump nahi.
```
Viva tipPrivate repo access pehle de do. Main branch submitted ZIP se match honi chahiye.
3
Download and run the app

Times asked 2
Official solution

Simplevenv activate → dependencies → DB create/migrate → flask run. Browser pe localhost dikhao.
Example
```
python -m venv .venv
source .venv/bin/activate
pip install -r requirements.txt
flask run
```
4
Create a company and student

Times asked 2
Official solution

SimpleNaya Flask route: URL, method, auth if needed, query, jsonify. Postman pehle.
Examiner number/filter change easy rakhna. CORS. Frontend tabhi jab bole.
Status codes sahi. Password JSON mein nahi.
Examiner 2 cheezein: simple desi line + tumhare project ki exact file.
Pehle ID, GitHub, portal ZIP. Phir run: Redis + Flask + worker + beat + Vue. Feature demo: login, RBAC, cache hit/miss, Celery mail, search.
Line pe ungli: input kahan, kaunsa check, query/cache/task, JSON/UI. Copilot band. Jo nahi kiya honestly bolo + kaise add karte.
Example
```
@app.route('/api/sum', methods=['POST'])
def sum_num():
    d = request.get_json()
    return jsonify(result=d['a'] + d['b'])
```
Project example: resources.py new Resource. Test Thunder. Optional Vue fetch.
5
Login as admin. Show functionality and approve company.

Times asked 2
Official solution

SimpleLogin flow pehle poochta hai "tu kaun hai?", token milne ke baad har API pe wohi proof dikhate ho.
Authentication step: Vue form email + password JSON POST karta hai. Flask user dhoondhta hai, check_password_hash se prove karta hai ki tum genuine ho. Galat 401. Sahi pe JWT + role milta hai — yeh session/token hai.
Vue localStorage (ya cookie) mein token rakhta hai, dashboard pe router.push. Aage ki har fetch header: Authorization: Bearer <token>. @jwt_required identity check (authentication). @roles_required('admin') permission check (authorization) — logged in ho, lekin allowed nahi to 403.
Validation alag cheez hai: empty email, password 8+ — form sahi bhara hai ya nahi. Woh identity prove nahi karta.
Logout = client token delete + login page. Server blacklist optional. Password response JSON mein kabhi mat bhejo.
Example
```
# Authentication
@app.route('/api/login', methods=['POST'])
def login():
    u = User.query.filter_by(email=data['email']).first()
    if not u or not check_password_hash(u.password, data['password']):
        return jsonify(msg='bad'), 401
    return jsonify(token=create_access_token(u.id), role=u.role)

# baad ki APIs
# Authorization: Bearer <token>
if current_user.role != 'admin':
    abort(403)
```
Project example: Login.vue POST /api/login → token LS → interceptor. Student token se admin route = 403. Empty form = validation, galat password = 401.
Viva tipNetwork tab mein password body dikhega localhost pe — prod HTTPS. Response mein hash/password echo mat karo.
6
Create a drive as the company then approve it via admin

Times asked 2
Official solution

SimpleNaya Flask route: URL, method, auth if needed, query, jsonify. Postman pehle.
Examiner number/filter change easy rakhna. CORS. Frontend tabhi jab bole.
Status codes sahi. Password JSON mein nahi.
Examiner 2 cheezein: simple desi line + tumhare project ki exact file.
Pehle ID, GitHub, portal ZIP. Phir run: Redis + Flask + worker + beat + Vue. Feature demo: login, RBAC, cache hit/miss, Celery mail, search.
Line pe ungli: input kahan, kaunsa check, query/cache/task, JSON/UI. Copilot band. Jo nahi kiya honestly bolo + kaise add karte.
Example
```
@app.route('/api/sum', methods=['POST'])
def sum_num():
    d = request.get_json()
    return jsonify(result=d['a'] + d['b'])
```
Project example: resources.py new Resource. Test Thunder. Optional Vue fetch.
7

Apply as a student to the drive and show the flow of it.

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.
8
Show Export function (backend jobs).

Times asked 2
Official solution

SimpleLive jobs: Redis, worker, beat, crontab abhi, logs + email/CSV.
Scheduled vs user-triggered dono dikhao. Missing feature honestly.
Examiner 2 cheezein: simple desi line + tumhare project ki exact file.
Pehle ID, GitHub, portal ZIP. Phir run: Redis + Flask + worker + beat + Vue. Feature demo: login, RBAC, cache hit/miss, Celery mail, search.
Line pe ungli: input kahan, kaunsa check, query/cache/task, JSON/UI. Copilot band. Jo nahi kiya honestly bolo + kaise add karte.
Suggested flow1) redis
2) worker
3) beat
4) crontab now
5) logs + MailHog
Example
```
CELERY_BEAT_SCHEDULE = {
  'daily-reminder': {
    'task': 'jobs.daily_reminder',
    'schedule': crontab(hour=18, minute=0),
  },
}
```
Project example: Change schedule current time. MailHog. Export button 202.
9

Asked me to blacklist a student and then try to login from it.

Times asked 2

Official solution

SimpleBlacklist/block: user.status='blocked' check login/booking pe. Temporary flag vs hard delete permanent.
10
Whats authentication and authorization and the difference.

Times asked 2
Official solution

SimpleAuthentication: tu kaun hai? (login). Authorization: tujhe permission hai? (role check).
Example
```
# auth
if check_password_hash(user.password, pwd):
    session['user_id'] = user.id

# authz
if user.role != 'admin':
    abort(403)
```
11

He asked me to show where caching is. (I just did it on one function for the sake of it as I was not sure where all to put it as server side caching is messy. I told him this.)

Times asked 2

Official solution

SimpleDecorator + Redis ping + invalidation line + miss/hit demo idea.
Kaunsi routes, timeout, key_prefix, query_string. POST pe nahi.
print after set sirf miss. Timeout chhota karke expiry.
Redis in-memory key-value store hai — fridge pe sticky note, poori kitchen (SQL database) har baar mat kholo.
MAD2 mein Redis do kaam: (1) cache — same venues/shows/dashboard JSON baar-baar DB se nahi (2) Celery broker — Flask task queue mein daalta hai, worker uthata hai.
Flow: cache.get(key) → hit pe return, miss pe SQLAlchemy + SET with timeout. Admin write ke baad cache.delete, warna stale list.
Source of truth database hi hai. Redis crash/band = cache miss (app chalni chahiye) + queue ruk sakti hai. Important bookings sirf Redis mein mat rakho.
Alag: Redis ≠ Memcached (Celery broker nahi). Redis ≠ localStorage (woh browser). redis-cli ping → PONG viva proof.
Project example: resources list GET cached. create_venue delete key.
12

Show the daily remainder email. (I made a student with temp mail and sent it there. Also, I sent it from my gmail for which you need to generate a key. Keep it saved in notepad or something).

Times asked 2

Official solution

SimpleDemo 5–7 min ki kahani: saari roles, koi milestone skip nahi, bolte-bolte dikhao.
Examiner list tick karta hai. Crash ho to panic nahi — terminal error padho.
Code tab kholna jab poochhein. Extra uncommitted features mat dikhana agar portal ZIP mein nahi.
Suggested flow1) Register/login user
2) Admin login — CRUD
3) Approval/blacklist
4) Booking/apply + edge case
5) Search + charts
6) CSV export / email job
7) Logout
Project example: Jo statement/parking/jobs/tickets hai uske user+admin journeys.
Viva tipBol: 'Yahan overbooking rokta hoon'. Mandatory features pehle, polish baad.
13
Asked me to open the vue file for one of the dashboard and asked what is mounted.

Times asked 2
Official solution

SimpleonMounted = Composition API ka mounted. setup() ke andar call.
Options API: mounted() method. Mix mat. Vue 3 dono chalte.
Lifecycle = component ki zindagi: created (instance, DOM nahi) → mounted/onMounted (DOM ready — fetch, Chart.js yahi) → updated → unmounted (clearInterval).
Dashboard API created mein isliye nahi ki $el/canvas missing ho sakta. Composition API: onMounted(() => {}) setup ke andar. Options: mounted() method. Mix mat.
Examiner 'konsa hook use kiya' — related .vue kholo, line padh ke bolo.
Example
```
import { onMounted, ref } from 'vue'
const items = ref([])
onMounted(async () => {
  items.value = await (await fetch('/api/items')).json()
})
```
Project example: script setup: onMounted(loadStats).

Advice: Really nice proctor. Gives you time to do everything. Will not pressure you. I actually got lost in my own project (point 7 in questions). I took like 2 mins to just find the code for it but he just kept quite till I found it. So just keep calm (unless you didn't make the project yourself) In feedback he said the demo was nice. Be comfortable with theory for level 2 and also be prepared to make changes in code. (I didn't make any changes in level 1 except crontab to show the daily remainder. He didn't ask excpet point 7 where I said it will be lengthy) I kept the celery beat and worker code and also venv activation code in notepad to reduce typing.

See reviews Level1_96 MAD1 Level 1

Aug 14, 2026

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1
What have you used, cli or CDN ?

Times asked 1
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.
2
Change the colour of login button

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.
3

Open notepad and write an api to get user details

Times asked 2

Official solution

SimpleViva wrap-up hai. Short thanks + confirm submission ZIP latest hai.
4
Have you implement role based authentication or not? If yes then show me in code where.

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'))
```

Advice: Proctor was very kind. Just answer as detailed as possible. Questions were basic and from the project itself

See reviews Level1_93 MAD1 Level 1

Aug 14, 2026

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1

saw some comments on my code and asked if I wrote it

Times asked 2

Official solution

SimpleHonest raho: kitna AI help. Report mein mention policy follow. Code samajh ke explain karo — AI % se zyada understanding matter.
2
ai% and where I used ai

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.
3
why did you "import os"

Times asked 2
Official solution

Simpleimport os — env vars, paths. SECRET_KEY = os.environ.get('SECRET_KEY'), file paths join.
Example
```
import os
basedir = os.path.abspath(os.path.dirname(__file__))
```
4

what are most important imports

Times asked 2

Official solution

SimpleBackend libs: Flask, Flask-SQLAlchemy, Werkzeug, maybe Flask-Login/WTF, Flask-Mail/Celery (MAD2).
5
what does jsonify do

Times asked 2
Official solution

Simplejsonify Python dict/list ko JSON response + proper Content-Type deta hai.
Example
```
return jsonify(message='ok', count=3), 200
```
6
what is cors and what it does

Times asked 2
Official solution

SimpleDifferent origin Vue vs Flask — browser CORS check. Server Allow-Origin.
Failed = frontend error even if curl works. Examiner curl vs browser.
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
```
from flask_cors import CORS
CORS(app, resources={r'/api/*': {'origins': 'http://localhost:8080'}})
```
Project example: Flask-CORS localhost:8080.
7

notepad coding :

Times asked 2

Official solution

SimpleViva wrap-up hai. Short thanks + confirm submission ZIP latest hai.
8
if you have a student table add a column with roll number

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.
9
write a javascript code which returns square of a number

Times asked 2
Official solution

SimpleNotepad/jsfiddle: function, map/filter, console.log, debug calmly.
Examiner JSON de sakta hai. filter score>15. Arrow vs function. Don't over-engineer.
Examiner 2 cheezein: simple desi line + tumhare project ki exact file.
Pehle ID, GitHub, portal ZIP. Phir run: Redis + Flask + worker + beat + Vue. Feature demo: login, RBAC, cache hit/miss, Celery mail, search.
Line pe ungli: input kahan, kaunsa check, query/cache/task, JSON/UI. Copilot band. Jo nahi kiya honestly bolo + kaise add karte.
Example
```
function fullName(first, last) {
  return first + ' ' + last
}
users.filter(u => u.score > 15)
```
Project example: Practice 10 snippets before viva. Online editor internet if allowed.
10
run app and show it's functionality

Times asked 2
Official solution

Simplevenv activate → dependencies → DB create/migrate → flask run. Browser pe localhost dikhao.
Example
```
python -m venv .venv
source .venv/bin/activate
pip install -r requirements.txt
flask run
```
11
celery daily reminder code

Times asked 2
Official solution

SimpleLive jobs: Redis, worker, beat, crontab abhi, logs + email/CSV.
Scheduled vs user-triggered dono dikhao. Missing feature honestly.
Examiner 2 cheezein: simple desi line + tumhare project ki exact file.
Pehle ID, GitHub, portal ZIP. Phir run: Redis + Flask + worker + beat + Vue. Feature demo: login, RBAC, cache hit/miss, Celery mail, search.
Line pe ungli: input kahan, kaunsa check, query/cache/task, JSON/UI. Copilot band. Jo nahi kiya honestly bolo + kaise add karte.
Suggested flow1) redis
2) worker
3) beat
4) crontab now
5) logs + MailHog
Example
```
CELERY_BEAT_SCHEDULE = {
  'daily-reminder': {
    'task': 'jobs.daily_reminder',
    'schedule': crontab(hour=18, minute=0),
  },
}
```
Project example: Change schedule current time. MailHog. Export button 202.

Advice: depends upon her mood , can go really deep with theory just don't piss her off

See reviews Level1_93 MAD1 Level 1

Aug 14, 2026

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1

show how the frontend is sending data to backend

Times asked 2

Official solution

SimpleDemo 5–7 min ki kahani: saari roles, koi milestone skip nahi, bolte-bolte dikhao.
Examiner list tick karta hai. Crash ho to panic nahi — terminal error padho.
Code tab kholna jab poochhein. Extra uncommitted features mat dikhana agar portal ZIP mein nahi.
Suggested flow1) Register/login user
2) Admin login — CRUD
3) Approval/blacklist
4) Booking/apply + edge case
5) Search + charts
6) CSV export / email job
7) Logout
Project example: Jo statement/parking/jobs/tickets hai uske user+admin journeys.
Viva tipBol: 'Yahan overbooking rokta hoon'. Mandatory features pehle, polish baad.

Advice: Just be confident

See reviews APPDEV_LEVEL1_VIVA14 MAD1 Level 1

Aug 14, 2026

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1

Questions (NOT IN ORDER):

Times asked 2

Official solution

SimpleViva wrap-up hai. Short thanks + confirm submission ZIP latest hai.
2
* in db.relationship(...cascade='all,delete-orphan') what does 'all, delete-orphan' do?

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
* can companies can start drive without being approved.

Times asked 2
Official solution

SimpleEdge cases: duplicate booking, full capacity, wrong role URL, empty search, invalid id.
Example
```
if Spot.query.get_or_404(spot_id).status != 'available':
    flash('Already taken')
    return redirect(...)
```
4

* can a student apply to a drive more than once

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
* what technology I used for authentication (I used flask-login) and then asked if that is session based or token based (I told that if I had used Flask-JWT (JSON Web Token) then that would have been Token based but flask-login is session based as it used cookies for authentication purpose. Additionally I showed the fetch requests which had `credentials: 'include'`)

Times asked 2
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().
6

* to implement a feature as follows: if a student is rejected in a drive they can apply again one last time (a second chance)

Times asked 2

Official solution

SimpleViva wrap-up hai. Short thanks + confirm submission ZIP latest hai.
7

* (I used <script setup> and imported { computed, onMounted }) What are computed and onMounted here? I told him the difference between Composition API and Options API, and how vue lifecycle hooks work and where setup(){} comes into play. And how and why computed was used here.

Times asked 2

Official solution

SimpleOptions: data methods computed alag. Composition: setup() logic group, reuse.
Vue 3 both. Course either. Don't claim unused API.
Component = reusable UI block (Navbar, Card). Props parent→child data, emit child→parent event. Slots parent HTML inner content.
computed cache + reactive derive (filtered list). watch side-effect (query change pe API). methods events. ref() primitive, reactive() object. Vuex/Pinia global store; localStorage persist, store nahi.
SFC: template + script + style ek .vue file. Parent-child exam favourite: list parent, row child :item + @delete.
Project example: script setup vs export default options — open file.
8
* to show the backend worker processes that were running, I told him that I did not have solid grasp of celery and redis and so did not implement them. Then he asked if had used them how would that have helped me, their need, etc.

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

At the end he said that's all, and to start preparing for L2.

Times asked 2

Official solution

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

See reviews appdev_level1_viva33 MAD1 Level 1

Aug 14, 2026

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1
Show ID card and GitHub collaborator

Times asked 2
Official solution

SimpleGitHub repo open karo: commits, collaborators, README. Examiner check karta hai tumne khud kaam kiya.
Example
```
Settings → Collaborators
Commits: regular messages, last-day dump nahi.
```
Viva tipPrivate repo access pehle de do. Main branch submitted ZIP se match honi chahiye.
2
CDN or CLI — what am using and explain the difference

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.
3

Full demo of entire application including all features, email functionality and trigger scheduled jobs live

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.
4

How and where is caching implemented — explain how cache hit works

Times asked 1

Official solution

SimpleCode explain formula: input kya aaya → auth/validation → DB change → response/UI.
Viva tipFunction signature + 3-4 important lines + edge case.
5
What is Redis and why is Redis faster than a normal database

Times asked 1
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
```
6
Token based or session based authentication — explain how auth works in both frontend and backend line by line

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().
7

Explain all API routes (he picked some 3-4)

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.
8

Explain route protection in Vue Router

Times asked 1

Official solution

SimpleCode explain formula: input kya aaya → auth/validation → DB change → response/UI.
Viva tipFunction signature + 3-4 important lines + edge case.
9
Coding — write a Flask route that accepts role as a URL parameter, queries the database and returns all user names belonging to that role

Times asked 1
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'
```
10

Coding — write a JavaScript function that accepts firstname and lastname and returns them combined as one string

Times asked 1

Official solution

Simplefunction full(a,b){return a+' '+b}. Write JS firstname lastname combined. Combine first last.
Template string OK.
JS browser ki language. const rebind nahi, let block. Arrow () => this lexical.
Promise: pending/fulfill/reject. async/await usko seedha padhne jaisa. try/catch await pe. Yeh Celery nahi — Celery Python worker.
fetch native AJAX. array.filter/map computed lists. Vue data reactive; plain JS DOM querySelector se manual.
Project example: console.log(full('A','B')).
Project example: console.log(full('A','B')).

Advice: Viva went 50 minutes — be prepared to go beyond 30 mins He is patient and professional, don't panic He asks line by line explanation — know your own code, not just concepts Feedback given was "good application, focus on backend code writing

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