Search – Lazy IITians Viva Prep

See reviews Level2_79 MAD1 Level 2

Aug 16, 2026

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1

Demonstrate project overall features

Times asked 1

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
Then he asked to add a column in admin search result

Times asked 1
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()
```
3
Asked to open notepad and write a route which will display my name (static)

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'
```
4

Asked to register a new staff and login (show that he can't login without approval from admin)

Times asked 1

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

Asked if I left any features in project which already mentioned in PS

Times asked 1

Official solution

SimpleViva wrap-up hai. Short thanks + confirm submission ZIP latest hai.
6

Lastly he told " all the best for level 2🥹"

Times asked 1

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.

Advice: over all he is very chill throught out the viva 😇

See reviews MLP_LEVEL1_VIVA MAD1 Level 1

Aug 16, 2026

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1

Asked to show everything mentioned in the mandatory requirements of L1 viva, one by one.

Times asked 1

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

Explain hyperparameter tuning

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.
3
Why did you train your final model on entire dataset? (You shouldn't)

Times asked 1
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)
```
4

How did you ensure data leakage?

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

Explain the parameters of XGBoost, Linear regressor.

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.
6

Coding questions was to load diabetes dataset

Times asked 1

Official solution

SimpleLive coding: notepad/editor mein chhota Flask route / Jinja loop / model field. Calm raho, run karke dikhao.
7
Convert it to the dataframe.

Times asked 1
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
Fit a logistic model on it.

Times asked 1
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)
```
9
Number of features in it.

Times asked 1
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.
10
Can you use logistic regression to predict the amount of rainfall. 11 Difference between bagging and boosting, is xgb a bagging model or a boosting model?

Times asked 1
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)
```
11

How to ensure reproducibility of the results?

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.

Advice: Prepare well. Understand your code well. Learn basic operation on toy datasets. Prepare your theory well. Be firm on your answers, he can trick you. Emphasis on theoretical understanding.

See reviews Level1_149 MAD1 Level 1

Aug 16, 2026

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1

MAD 1 level 2

Times asked 1

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
2 min smoke test, on particular condition.

Times asked 1
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

Coding question : make change to DB (models.py) , add a column in company model

Times asked 1

Official solution

SimpleLive coding: notepad/editor mein chhota Flask route / Jinja loop / model field. Calm raho, run karke dikhao.
4

•⁠ ⁠explain restful api

Times asked 1

Official solution

SimpleREST: resources + HTTP verbs. GET read, POST create, PUT/PATCH update, DELETE remove. Stateless ideal.
5

All About 40 mins

Times asked 1

Official solution

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

See reviews Level1_106 MAD1 Level 1

Aug 16, 2026

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1

Write code in notepad - write a function to registration of a student

Times asked 1

Official solution

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

See reviews Level3_45 MAD1 Level 3

Aug 16, 2026

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1

TIP: Check that your screen share works properly. I had prepared well with everything else about the code and the checklist, but my screen share in GMeet was not showing anything, and I had to restart my laptop and open everything from the beginning, which wasted almost 15 minutes.

Times asked 1

Official solution

SimpleViva wrap-up hai. Short thanks + confirm submission ZIP latest hai.
2

Explain MVC and how I implemented that in my project (explain the file structure).

Times asked 1

Official solution

SimpleProject overview: problem → roles → main entities → key flows (register, book, admin approve).
Viva tip1 minute elevator pitch ready rakho, phir demo.
3
Explain the models I wrote and explain each of the relationships and constraints used, including backref.

Times asked 1
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')
```
4
Write a Jinja code: if a company status is approved, show the company name.

Times asked 1
Official solution

SimpleJinja for loop list render karta hai. loop.index, else branch empty list pe.
Example
```
{% for u in users %}
  <tr><td>{{ loop.index }}</td><td>{{ u.email }}</td></tr>
{% endfor %}
```
5

Demonstrate the project (Mam helped with the flow).

Times asked 1

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
In between, Mam asked me to make a heading a clickable link with no redirection (while using an a tag, make sure you use # in href, i.e., href="#").

Times asked 1
Official solution

Simpleredirect dusre URL pe bhejta hai. flash one-time message session mein rakh ke next page pe dikhata hai.
Example
```
flash('Login successful', 'success')
return redirect(url_for('user.dashboard'))
```
7
Session vs Cookie

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().
8
db.session.commit() vs db.session.flush()

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().
9

Link vs Anchor tags

Times asked 1

Official solution

SimpleHTML structure, CSS styling. Templates mein semantic tags + classes. Responsive ke liye viewport + flex/grid/bootstrap.

See reviews Level3_42 MAD1 Level 3

Aug 16, 2026

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1

-Asked me to show id and then install the project from viva portal and give a demo

Times asked 1

Official solution

SimpleCamera pe clearly college/IITM ID dikhao — naam aur photo match hone chahiye.
Viva tipPehle se ID haath mein rakho, glare mat aane do. Iske baad GitHub + project run.
2

-he asked several questions

Times asked 1

Official solution

SimpleViva wrap-up hai. Short thanks + confirm submission ZIP latest hai.
3
2-differnece between back populates and back ref, why i used back populates

Times asked 1
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')
```
4

3-asked me to show the models then said why i used only one file for models and routes and all(i took theory and project together so its reasonable enough to not know the file system at start nor does it matter in this project)

Times asked 1

Official solution

SimpleTheory = concepts: ORM, MVC, auth vs authz, Jinja inheritance, sessions. 1-line def + project example.
5
4- asked if i wanted to make the project from start then how like i distribute the file(models, routes and app.start)

Times asked 1
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)
```
6
5-asked why i use uselist in model(for one-one relation), then asked what if we want to relation be to one-many(simply remove the uselist)

Times asked 1
Official solution

Simpleuselist=False relationship ko list nahi, single object banata hai — one-to-one / many-to-one scalar.
Example
```
profile = db.relationship('Profile', uselist=False, backref='user')
# user.profile → Profile obj, list nahi
```
7
6-how the relationships in models work(thru foreign key we make relationships)

Times asked 1
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')
```
8
7- asked me what specific like numbers does

Times asked 1
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
9-authenticaton and authorization and where have i used them in my code

Times asked 1
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)
```
10

10- some more route questions(easy)

Times asked 1

Official solution

SimpleViva wrap-up hai. Short thanks + confirm submission ZIP latest hai.
11
then asked what if we return nothing in the backend for this if statement

Times asked 1
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

asked some port questions, like what status codes will it give, asked asked for what status code d i know(named all the codes that i knew)

Times asked 1

Official solution

SimpleStatus code server ka result: 200 OK, 302 redirect, 400 bad input, 401/403 auth, 404 not found, 500 server error.
13

and the viva ended, basically he will test your understanding of the code, mainly focused on app.py, didn't ask any question regarding html or css or chart.js that i used

Times asked 1

Official solution

SimpleBootstrap CSS framework — grid, navbar, buttons jaldi. CDN ya downloaded files.
14

Then i asked how was my viva and he said that he was impressed, i have a good understanding of my code and i answered his every question.

Times asked 1

Official solution

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

Advice: He is very calm, may ask some out of the box questions but its ok if you dont know them word by word, the understanding of the code is crucial, know your routes, know your models, just go thru every like of your code before giving viva.

See reviews level1_viva30 MAD1 Level 1

Aug 16, 2026

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1

-Came Exactly on time and viva lasted for 45mins

Times asked 1

Official solution

SimpleViva wrap-up hai. Short thanks + confirm submission ZIP latest hai.
2

-Checked my id Card

Times asked 1

Official solution

SimpleCamera pe clearly college/IITM ID dikhao — naam aur photo match hone chahiye.
Viva tipPehle se ID haath mein rakho, glare mat aane do. Iske baad GitHub + project run.
3

-He is veryy silent and didn't interrupt the demo to ask anything so I kept going on and gave the demo for 40 mins:)

Times asked 1

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

-I gave a really good demo with database tables on the side and explained routes and different feature and he liked it ig

Times asked 1

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

-Most of the time was gone so he asked me to show my code app.py and asked only 2 ques which i explained really well

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.
6
2-why i used back populates

Times asked 1
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')
```
7

And that's it he said so its enough for this viva, i asked for his remarks and he said my app is better than anyone and my code understanding is excellent (just because the demo was good.)

Times asked 1

Official solution

SimpleViva wrap-up hai. Short thanks + confirm submission ZIP latest hai.
8

pro tip for you - Explain the demo really well and highlight different feature of your app along with every page you made in the demo itself without him asking so spend as much time as you want to give demo.

Times asked 1

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.

Advice: As i said he was really silent, asks simple ques, my demo went long so didn't ask more ques but that may not be the case with you so understand your code well yourself before sitting in the viva.

See reviews Level1_131 MAD1 Level 1

Aug 16, 2026

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1
DOUBLE CLICK FOR FULL VIEW. LEVEL - 2

Times asked 1
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.
2
There was no demo required. She asked me to show my ID and perform the checksum or download the project. I chose to download the project.

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
```
3

She asked me to explain the structure of my application.

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.
4
She asked me to write code to fetch a student from the Student table using ID.

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'
```
5
She asked me to write code to fetch applications from a student (e.g., apps = student.applications).

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'
```
6

She asked me to open register_student.html and explain why I used pattern="[a-zA-Z0-9_]+"

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.
7
She asked why I used minlength="6" and what type of validation it represents.

Times asked 1
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')
```
8
She asked what is enctype and what is this use for?

Times asked 1
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

She asked what would happen if we use the GET method to send data to the server.

Times asked 1

Official solution

SimpleViva wrap-up hai. Short thanks + confirm submission ZIP latest hai.
10
She asked how to extract data from query parameters in a URL.

Times asked 1
Official solution

SimpleQuery params URL ? ke baad: /search?q=mall. Flask: request.args.get('q').
Example
```
@app.route('/search')
def search():
    q = request.args.get('q', '')
    return ...
```
11

After around 45 minutes, she said “This is all from my side.” Then she provided feedback and asked if I wanted to ask anything else. You should definitely ask for feedback on how you can improve your project or viva performance.

Times asked 1

Official solution

SimpleImprove ideas: caching, better validation, tests, pagination, email reminders, accessibility, mobile UI, logging.
Viva tip1-2 concrete features bolo jo time milne pe add karte — vague 'AI' mat.

Advice: If you have not studied your project well, or you are looking for a proctor who asks fewer questions, then you are in trouble. If you have basic good understanding of MAD-1 theory and how it is applied in your project then she is one of the best proctors you can ever get. She is very interactive, points out your mistakes, and even guides you if you go wrong while writing code. Overall she has a very good vibe, you might want to interact more with her. If you don’t know something, do not try to act oversmart. Just admit that you don’t know. If you ask her the question back, she may explain it to you. Be confident, clear, and respectful while answering. You should have a strong understanding of app.py and models.py Be prepared to write routes along with HTML forms or tables. You should know basic frontend concepts. No need to go too deep into Bootstrap elements. Go through all the questions mentioned about her in this sheet, 80–90% of them are likely to repeat.

See reviews Level1_91 MAD1 Level 1

Aug 16, 2026

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1

Proctor : level1 91

Times asked 1

Official solution

SimpleViva wrap-up hai. Short thanks + confirm submission ZIP latest hai.
2
ID and GitHub Collab verification

Times asked 1
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
Asked to make live changes (1 in both frontend and backend) :

Times asked 1
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.
4

can you make a code change such that when a user types /register in the browser address bar, it actually displays the Login page instead of the Registration page?

Times asked 1

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
remove the border shadow in login form

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
What is SQL injection

Times asked 1
Official solution

SimpleUser input concat query. ORM bound params bachata. text()+user mat.
SQLAlchemy injection still if format SQL.
Browser + API ke beech extra darwaze: CORS origin allow, HTTPS encrypt transit, CSRF cookie-auto-send attack, XSS HTML inject, SQL injection raw query.
MAD2 SPA: Vue :8080 Flask :5000 → Flask-CORS. JWT localStorage XSS se chori ho sakta — v-html user input pe avoid. Password Network tab localhost pe dikhega; prod HTTPS, response mein password echo nahi.
401 unauthenticated, 403 unauthorized, 400 validation. Hash one-way — SHA decrypt nahi hota. Secret key .env, GitHub pe nahi.
Example
```
# bad: f"SELECT * FROM user WHERE name='{name}'"
User.query.filter_by(name=name)  # good
```
Project example: filter_by(name=name) good.
7

What is CRUD Applications All done in 20 minutes

Times asked 1

Official solution

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

Advice: Nice and Chill Guy

See reviews Level3_45 MAD1 Level 3

Aug 16, 2026

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1

mam was very calm and polite. 1)Id card 2)Explain the folder structure of your app and MVC of your app?

Times asked 1

Official solution

SimpleCamera pe clearly college/IITM ID dikhao — naam aur photo match hone chahiye.
Viva tipPehle se ID haath mein rakho, glare mat aane do. Iske baad GitHub + project run.
2
Explain the models.py and the relationship.

Times asked 1
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
What is backref and back populates?

Times asked 1
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')
```
4
if the field unique=True and you keep inserting duplicate values then what will happen?

Times asked 1
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.
5
Explain the role based access in your controllers.py?

Times asked 1
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'))
```
6

show and explain the blacklist Route?

Times asked 1

Official solution

SimpleBlacklist/block: user.status='blocked' check login/booking pe. Temporary flag vs hard delete permanent.
7
Explain create_drive route,edit drive route,update route? 9)How have you ensured that if a student has applied for the drive then he will not be able to apply for the same drive again? 10)how have you prevented duplicate applications?

Times asked 1
Official solution

SimpleDuplicate booking/register rokne ke liye unique constraint + query check pehle.
Example
```
exists = Booking.query.filter_by(user_id=uid, slot_id=sid).first()
if exists:
    flash('Already booked'); abort/redirect
```
8
what is enctype multipart/form-data?

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
```
9
write a jinja if loop for the student if cgpa>7 then display the name of the student with green color?

Times asked 1
Official solution

SimpleJinja for loop list render karta hai. loop.index, else branch empty list pe.
Example
```
{% for u in users %}
  <tr><td>{{ loop.index }}</td><td>{{ u.email }}</td></tr>
{% endfor %}
```
10
Write a route to update the cgpa of the student? 17)Write a drop down option in the register student.html that show gender of the person?

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'
```
11
In the navbar create a profile link?

Times asked 1
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.
12

what is db.flush? I didnot know about it 20)center a div vertically and horizontally Viva lasted for 50 minutes..

Times asked 1

Official solution

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

Advice: Ma’am was the most humble and polite person I have ever come across. She corrected me while doing coding questions and also she was waiting patiently for me to complete the task. She advised me to know the tags with the name itself and also do a little improvement while writing the code in notepad (syntax and logic). Just know your code and be confident to explain everything you done in the project.

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