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May 2025 term · Modern Application Development I · BSCS2003

Modern Application Development I End Term: 31 August 2025, Set QDD1 (May 2025 term)

The IIT Madras BS Modern Application Development I (MAD 1) End Term paper sat on 31 Aug 2025, in the May 2025 term, set QDD1: 32 questions for 100 marks in 180 minutes. Every question is below with its answer. Take it as a timed mock test to be marked, or read it through first.

Questions
32
Marks
100
Duration
180 min
MCQ
26
MSQ
6
Take as mock testPractise with answers

Updated

Official paper: IIT M DIPLOMA FN EXAM QDD1 31 Aug 2025 · No negative marking.

Question 1

+2 marksOne correct option

You're designing an API to update a user's profile picture but your database has 4 records in a row, profile picture is one of them. Which HTTP method is most appropriate?

  1. A

    POST

  2. B

    PATCH

  3. C

    PUT

  4. D

    DELETE

Show answer

Correct answer

  • B

    PATCH

Question 1 on its own page

Question 2

+2 marksOne correct option

What is the correct sequence of operations when receiving a form in Flask?

  1. A

    Validate → Render → Access → Store

  2. B

    Access → Store → Validate → Render

  3. C

    Access → Validate → Store → Redirect

  4. D

    POST → GET → Redirect → Validate

Show answer

Correct answer

  • C

    Access → Validate → Store → Redirect

Question 2 on its own page

Question 3

+2 marksOne correct option

Consider the following statements and choose the correct option
Statement 1: It is mandatory to implement server-side validations and client-side validations. Statement 2: Server-side validations can be implemented using HTML5.

  1. A

    Statement 1 is false, while statement 2 is true

  2. B

    Statement 1 is true, while statement 2 is false

  3. C

    Both statements are false

  4. D

    Both statements are true

Show answer

Correct answer

  • C

    Both statements are false

Question 3 on its own page

Question 4

+2 marksOne correct option

What will be the output when accessing http://localhost:5000/user/42 in the following Flask app?

python
from flask import Flask
app = Flask(__name__)


@app.route('/user/<uid>')
def show_user(uid):
    return f"User ID: {uid * 2}"


app.run(debug=True)
  1. A
  2. B
  3. C
  4. D
Show answer

Correct answer

  • B
Question 4 on its own page

Question 5

+2 marksOne correct option

Consider the following HTML form:

html
<form action="/search" method="get">
  <input type="text" name="q">
  <input type="submit">Search</input>
</form>

What URL will be generated when the user enters "flask" in the input box and clicks on the submit button?

  1. A
  2. B
  3. C
  4. D
Show answer

Correct answer

  • B
Question 5 on its own page

Question 6

+3 marksOne correct option

You're creating a registration form. The form is written as:

html
<form action="/register" method="post">

And in Flask:

python
@app.route("/register")
def register():
    return "Form received"

When the user submits the form, they see a 405 Method Not Allowed error. Why is this happening?

  1. A

    There is no return statement inside the function

  2. B

    The form is missing CSRF protection

  3. C

    The Flask route does not allow POST method

  4. D

    The route should have a trailing slash

Show answer

Correct answer

  • C

    The Flask route does not allow POST method

Question 6 on its own page

Question 7

+3 marksOne correct option

You created the following templates:

base.html

html
<html>
<body>
  {% block content %}{% endblock %}
</body>
</html>

home.html

html
{% extends "base.html" %}
<h1>Welcome!</h1>

But when rendered, "Welcome!" doesn't appear. Why?

  1. A
  2. B
  3. C
  4. D
Show answer

Correct answer

  • B
Question 7 on its own page

Question 8

+3 marksOne correct option

A user downloads a 10 MB file from a server with 5 Mbps speed. How long does it approximately take?

  1. A

    2 seconds

  2. B

    10 seconds

  3. C

    16 seconds

  4. D

    1.6 seconds

Show answer

Correct answer

  • C

    16 seconds

Question 8 on its own pageAlso asked in End Term 31 Aug 2025

Question 9

+3 marksOne correct option

Suppose you have these models in your Flask-SQLAlchemy app:

python
class Author(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    books = db.relationship('Book', backref='author', cascade="all, delete")


class Book(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    title = db.Column(db.String(80))
    author_id = db.Column(db.Integer, db.ForeignKey('author.id'))

If you delete an Author instance from the database, what happens to their related Book instances?

  1. A
  2. B
  3. C
  4. D
Show answer

Correct answer

  • B
Question 9 on its own page

Question 10

+3 marksOne correct option

Consider the following HTML code snippet (without any CSS styling).

html
<div>
    <p>This is paragraph 1</p>
    <span>Span element 1</span>
    <span>Span element 2</span>
    <p>This is paragraph 2</p>
    <a href="#">Link 1</a>
    <a href="#">Link 2</a>
    <div>Nested div content</div>
    <strong>Bold text</strong>
    <em>Italic text</em>
</div>

Which of the following statements correctly describes how the elements will be displayed by default in a browser?

  1. A
  2. B
  3. C
  4. D
Show answer

Correct answer

  • C
Question 10 on its own page

Question 11

+3 marksOne correct option

Consider the following HTML document with internal CSS and inline styles.

html
<!DOCTYPE html>
<html>
<head>
    <style>
        p {
            color: blue;
            font-size: 16px;
            font-weight: normal;
        }
        .highlight {
            color: red;
            font-weight: bold;
        }
        #special {
            color: green;
            font-size: 20px;
        }
        p.highlight {
            color: orange;
        }
    </style>
</head>
<body>
 <p class="highlight" id="special" style="color: purple; font-size: 14px;">
  Paragraph 5
 </p>
</body>
</html>

What will be the final color and font-size for "Paragraph 5"?

  1. A

    Color: green, Font-size: 20px

  2. B

    Color: orange, Font-size: 14px

  3. C

    Color: purple, Font-size: 20px

  4. D

    Color: purple, Font-size: 14px

Show answer

Correct answer

  • D

    Color: purple, Font-size: 14px

Question 11 on its own page

Question 12

+3 marksOne correct option
  1. A

    1-c, 2-a, 3-d, 4-b

  2. B

    1-d, 2-c, 3-a, 4-b

  3. C

    1-c, 2-d, 3-b, 4-a

  4. D

    1-c, 2-d, 3-a, 4-b

Show answer

Correct answer

  • D

    1-c, 2-d, 3-a, 4-b

Question 12 on its own page

Question 13

+3 marksOne correct option

Consider the following Python code.

File name: main.py

python
def funA(func):
   def inner_wrapper():
       print("Wrapper function of funA")
       res1 = func()
       res2 = func()
       return res1, res2
   return inner_wrapper


@funA
def funB():
   return "I am from funB"


print(funB())

What will be the output, when running the above code using the command “python main.py”?

  1. A
  2. B
  3. C
  4. D
Show answer

Correct answer

  • B
Question 13 on its own page

Question 14

+3 marksOne correct option

Consider the HTML code below, what will be the text color of the paragraph?

html
<!DOCTYPE html>
<head>
  <style>
    p { color: blue; }
    p.important { color: red; }
    #main p.important { color: green; }
  </style>
</head>
<body>
  <div id="main">
    <p class="important">Hello World!</p>
  </div>
</body>
</html>
  1. A

    Blue

  2. B

    Red

  3. C

    Green

  4. D

    Black

Show answer

Correct answer

  • C

    Green

Question 14 on its own page

Question 15

+3 marksOne correct option
  1. A

    1-a, 2- c, 3-b, 4-d, 5-e

  2. B

    1-b, 2- c, 3-a, 4-e, 5-d

  3. C

    1-e, 2- d, 3-b, 4-a, 5-c

  4. D

    1-e, 2- d, 3-c, 4-a, 5-b

Show answer

Correct answer

  • C

    1-e, 2- d, 3-b, 4-a, 5-c

Question 15 on its own page

Question 16

+4.5 marksOne correct option

You are working on a team project hosted on GitHub. After making changes to your local files, you run the following commands in this exact order:

bash
git status
git add .
git commit -m "Fixed header bug"
git push
git pull

Assuming your teammate pushed a new change just before you did git push, what is the most likely outcome?

  1. A
  2. B
  3. C
  4. D
Show answer

Correct answer

  • D
Question 16 on its own page

Question 17

+4.5 marksOne correct option

Consider the following Python script that processes command line arguments and uses Jinja2 templates.

python: app.py

python
import sys
from jinja2 import Template


pre_message = sys.argv[1] if len(sys.argv) > 1 else ""
pre_language = sys.argv[2] if len(sys.argv) > 2 else "unknown"


post_message = pre_message.strip().lower().replace(" ", "_")
post_language = pre_language.capitalize()


template_string = """
<div>
    <h1>{{ post_message | upper }}</h1>
    <p>Message: {{ post_message }}</p>
    <p>Language: {{ post_language }}</p>
    <p>Count: {{ pre_message | length }}</p>
</div>
"""




template = Template(template_string)
output = template.render(
    pre_message = pre_message,
    post_message = post_message,
    post_language = post_language
)


print(output)

If the script is run with the command:

bash

bash
python app.py " Hello World " "python"

What will be the output for the following template variables?

  1. A
  2. B
  3. C
  4. D
Show answer

Correct answer

  • B
Question 17 on its own page

Question 18

+4.5 marksOne correct option

Consider the following Flask application structure and code.

text
my_project/
├── app.py
├── views/
│   └── dashboard.html
├── templates/
│   ├── base.html
│   └── home.html
└── custom_templates/
    ├── admin/
    │   └── login.html
    └── user/
        └── profile.html

app.py:

python
from flask import Flask, render_template


app = Flask(__name__, template_folder='custom_templates')


@app.route('/')
def home():
    return render_template('home.html')


@app.route('/admin')
def admin_login():
    return render_template('admin/login.html')


@app.route('/profile')
def user_profile():
    return render_template('user/profile.html')


@app.route('/dashboard')
def dashboard():
    return render_template('dashboard.html')


if __name__ == '__main__':
    app.run(debug=True)

Which of the following statements about the template rendering behavior is correct?

  1. A

    All routes will work correctly as Flask will automatically search in both templates/ and custom_templates/ folders

  2. B

    The / and /dashboard routes will fail with TemplateNotFound error, while /admin and /profile routes will work correctly

  3. C

    Only the /admin and /profile routes will work correctly, while / and /dashboard routes will fail with TemplateNotFound error

  4. D

    All routes will fail because Flask requires the template folder to be named exactly templates

Show answer

Correct answer

  • C

    Only the /admin and /profile routes will work correctly, while / and /dashboard routes will fail with TemplateNotFound error

Question 18 on its own page

Question 19

+4.5 marksOne correct option

Examine the following Python code snippet.

File: logger_test.py

python
import logging
import sys


logging.basicConfig(level=logging.WARNING,
               format='%(asctime)s - %(levelname)s - %(message)s')


def process_data(num):
    logging.debug("Starting data processing")
    logging.info("Processing number: %d", num)


    if num == 0:
        logging.warning("Zero value detected - potential division by zero")
        return None
    elif num < 0:
        logging.error("Negative number provided: %d", num)
        return None
    else:
        result = 100 / num
        logging.info("Calculation completed successfully")
        return result




try:
    input_num = int(sys.argv[1])
    result = process_data(input_num)
    if result:
        print(f"Result: {result}")
except IndexError:
    logging.critical("No command line argument provided")
except ValueError:
    logging.error("Invalid input - not a number")

What will be the output when running the command: python logger_test.py -5 ?

  1. A
  2. B
  3. C
  4. D
Show answer

Correct answer

  • D
Question 19 on its own page

Question 20

+2 marksOne or more correct options

Which statements about REST API design are correct?

Select all that apply.

  1. A

    PUT requests should be idempotent

  2. B

    GET requests can have request bodies for complex queries

  3. C

    PATCH is used for partial updates

  4. D

    DELETE must return the deleted resource

Show answer

Correct answers

  • A

    PUT requests should be idempotent

  • C

    PATCH is used for partial updates

Question 20 on its own page

Question 21

+3 marksOne or more correct options

Select all that apply.

  1. A
  2. B
  3. C
  4. D
Show answer

Correct answers

  • B
  • D
Question 21 on its own page

Question 22

+3 marksOne or more correct options

Consider the following Python code.

python
from string import Template


output = "List of courses in IITM BS Diploma : $c1, $c2, $c3, $c4, $c5"
my_template = Template(output)
print(==Missing code here===)

Which of the following statement(s) prints the output without any KeyError exception?

Select all that apply.

  1. A
  2. B
  3. C
  4. D
  5. E
Show answer

Correct answers

  • A
  • B
  • C
  • D
Question 22 on its own page

Question 23

+3 marksOne or more correct options

Consider the following Flask app code.

python
from flask import Flask, request
valid_users = [
   {"uid": "student", "pwd": "12345"},
   {"uid": "professor", "pwd": "54321"},
   {"uid": "hod", "pwd": "abcde"},
]


app = Flask(__name__)


@app.route("/signin")
def login():
   args = request.args
   for vu in valid_users:
       if vu["uid"] == args["uid"] and vu["pwd"] == args["pwd"]:
           return "You are authorized!!"
       else:
           return "You are unauthorized!!"


app.run(debug=True)

Assume the above flask app runs on “http://127.0.0.1:5000/” and is accessed through the web browser. Select the URL(s) that render Not Found error.

Select all that apply.

  1. A
  2. B
  3. C
  4. D
  5. E
Show answer

Correct answers

  • B
  • D
Question 23 on its own page

Question 24

+4.5 marksOne or more correct options

Examine the following Python test file:

Filename: math_tests.py

python
import pytest


def multiply(a, b):
    return a * b


def divide(a, b):
    if b == 0:
        raise ValueError("Cannot divide by zero")
    return a / b


@pytest.mark.unit
def test_multiply_positive():
    assert multiply(3, 4) == 12


@pytest.mark.integration
def test_divide_normal():
    assert divide(10, 2) == 5.0


@pytest.mark.slow
@pytest.mark.integration
def test_complex_calculation():
    result = divide(multiply(6, 7), 2)
    assert result == 21.0
@pytest.mark.unit
def test_multiply_negative():
    assert multiply(-2, 3) == -6

Consider the following pytest command output:

text
========= 1 passed, 3 deselected in 0.02s =========

Which of the following pytest commands would produce the output shown above?

Select all that apply.

  1. A
  2. B
  3. C
  4. D
  5. E
Show answer

Correct answers

  • B
  • D
Question 24 on its own page

Question 25

+4.5 marksOne or more correct options

Select all that apply.

  1. A
  2. B
  3. C
  4. D
Show answer

Correct answers

  • A
  • B
Question 25 on its own page

Question 26

+4.5 marksOne correct option

Prashant and Nikita are creating a quiz question paper collaboratively. They are each working on different sections — and complete their tasks in parallel. Meanwhile, Mayur is enjoying a single-player game that finishes when the game loop ends.

To compare productivity:

  • If Prashant and Nikita (together) finish faster than Mayur, the winner is "Team".
  • If Mayur finishes faster, he wins.
  • If both take the same time, Mayur wins by default.

Prashant and Nikita send their task completion times to a Flask backend via query parameters.The server must simulate parallel execution of their tasks (i.e., max(prashant_time, nikita_time)) and compare it against Mayur's game time. The route returns who finishes faster.

python
from flask import Flask, jsonify, request


app = Flask(__name__)


@app.route('/task')
def task():
    prashant_time = int(request.args.get("prashant"))
    nikita_time = int(request.args.get("nikita", 3))
    mayur_time = int(request.args.get("mayur", 6))


    team_time = max(prashant_time, nikita_time)  # parallel processing
    winner = "Team" if team_time < mayur_time else "Mayur"


    return jsonify({
        "winner": winner,
        "team_time": team_time,
        "mayur_time": mayur_time
    })

Based on the above data, answer the given subquestions.

  1. A
  2. B
  3. C
  4. D
Show answer

Correct answer

  • B
Question 26 on its own page

Question 27

+3 marksOne correct option

Prashant and Nikita are creating a quiz question paper collaboratively. They are each working on different sections — and complete their tasks in parallel. Meanwhile, Mayur is enjoying a single-player game that finishes when the game loop ends.

To compare productivity:

  • If Prashant and Nikita (together) finish faster than Mayur, the winner is "Team".
  • If Mayur finishes faster, he wins.
  • If both take the same time, Mayur wins by default.

Prashant and Nikita send their task completion times to a Flask backend via query parameters.The server must simulate parallel execution of their tasks (i.e., max(prashant_time, nikita_time)) and compare it against Mayur's game time. The route returns who finishes faster.

python
from flask import Flask, jsonify, request


app = Flask(__name__)


@app.route('/task')
def task():
    prashant_time = int(request.args.get("prashant"))
    nikita_time = int(request.args.get("nikita", 3))
    mayur_time = int(request.args.get("mayur", 6))


    team_time = max(prashant_time, nikita_time)  # parallel processing
    winner = "Team" if team_time < mayur_time else "Mayur"


    return jsonify({
        "winner": winner,
        "team_time": team_time,
        "mayur_time": mayur_time
    })

Based on the above data, answer the given subquestions.

  1. A
  2. B
  3. C
  4. D
Show answer

Correct answer

  • D
Question 27 on its own page

Question 28

+4.5 marksOne correct option

Consider the following Flask-SQLAlchemy models for a library management system:

File: models.py

python
from flask_sqlalchemy import SQLAlchemy


db = SQLAlchemy()


class Library(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(100), unique=True, nullable=False)
    location = db.Column(db.String(200), nullable=False)
    books = db.relationship('Book', backref='library_ref', lazy=True)


class Author(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(80), nullable=False)
    email = db.Column(db.String(120), unique=True, nullable=True)
    books = db.relationship('Book', backref='author_ref', lazy=True)


class Book(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    title = db.Column(db.String(150), nullable=False)
    isbn = db.Column(db.String(13), unique=True, nullable=False)
    library_id = db.Column(db.Integer, db.ForeignKey('library.id'), nullable=False)
    author_id = db.Column(db.Integer, db.ForeignKey('author.id'), nullable=False)
    is_available = db.Column(db.Boolean, default=True)

File: app.py

python
from flask import Flask, request, jsonify


app = Flask(__name__)


@app.route('/books/<int:library_id>', methods=['GET'])
def get_library_books(library_id):
    library = Library.query.get_or_404(library_id)
    available_books = Book.query.filter_by(
        library_id=library_id,
        is_available=True
    ).all()


    result = []
    for book in available_books:
        result.append({
            'id': book.id,
            'title': book.title,
            'author': book.author_ref.name,
            'isbn': book.isbn
        })


    return jsonify({
        'library': library.name,
        'location': library.location,
        'available_books': result
    })

Based on the above data, answer the given subquestions.

Which of the following statements about the database schema and model relationships is correct?

  1. A
  2. B
  3. C
  4. D
Show answer

Correct answer

  • C
Question 28 on its own page

Question 29

+3 marksOne correct option

Consider the following Flask-SQLAlchemy models for a library management system:

File: models.py

python
from flask_sqlalchemy import SQLAlchemy


db = SQLAlchemy()


class Library(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(100), unique=True, nullable=False)
    location = db.Column(db.String(200), nullable=False)
    books = db.relationship('Book', backref='library_ref', lazy=True)


class Author(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(80), nullable=False)
    email = db.Column(db.String(120), unique=True, nullable=True)
    books = db.relationship('Book', backref='author_ref', lazy=True)


class Book(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    title = db.Column(db.String(150), nullable=False)
    isbn = db.Column(db.String(13), unique=True, nullable=False)
    library_id = db.Column(db.Integer, db.ForeignKey('library.id'), nullable=False)
    author_id = db.Column(db.Integer, db.ForeignKey('author.id'), nullable=False)
    is_available = db.Column(db.Boolean, default=True)

File: app.py

python
from flask import Flask, request, jsonify


app = Flask(__name__)


@app.route('/books/<int:library_id>', methods=['GET'])
def get_library_books(library_id):
    library = Library.query.get_or_404(library_id)
    available_books = Book.query.filter_by(
        library_id=library_id,
        is_available=True
    ).all()


    result = []
    for book in available_books:
        result.append({
            'id': book.id,
            'title': book.title,
            'author': book.author_ref.name,
            'isbn': book.isbn
        })


    return jsonify({
        'library': library.name,
        'location': library.location,
        'available_books': result
    })

Based on the above data, answer the given subquestions.

  1. A
  2. B
  3. C
  4. D
Show answer

Correct answer

  • D
Question 29 on its own page

Question 30

+3 marksOne correct option

Consider the following flask code and answer the given subquestions.

python
from flask import Flask, request


app = Flask(__name__)


@app.route('/score')
def score():
    name = request.args.get('name', 'Guest')
    try:
        marks = int(request.args.get('marks', 0))
    except ValueError:
        return f"Invalid marks for {name}"


    if marks >= 90:
        grade = "A"
    elif marks >= 75:
        grade = "B"
    elif marks >= 60:
        grade = "C"
    else:
        grade = "F"


    return f"{name} scored {marks} and received grade {grade}"


app.run(debug=True)
  1. A

    Alex scored 0 and received grade F

  2. B

    Invalid marks for Alex

  3. C

    Alex scored eighty and received grade F

  4. D

    Error 500: Internal Server Error

Show answer

Correct answer

  • B

    Invalid marks for Alex

Question 30 on its own page

Question 31

+2 marksOne correct option

Consider the following flask code and answer the given subquestions.

python
from flask import Flask, request


app = Flask(__name__)


@app.route('/score')
def score():
    name = request.args.get('name', 'Guest')
    try:
        marks = int(request.args.get('marks', 0))
    except ValueError:
        return f"Invalid marks for {name}"


    if marks >= 90:
        grade = "A"
    elif marks >= 75:
        grade = "B"
    elif marks >= 60:
        grade = "C"
    else:
        grade = "F"


    return f"{name} scored {marks} and received grade {grade}"


app.run(debug=True)
  1. A

    Guest scored 88 and received grade A

  2. B

    Guest scored 88 and received grade B

  3. C

    Guest scored 0 and received grade F

  4. D

    Invalid marks for Guest

Show answer

Correct answer

  • B

    Guest scored 88 and received grade B

Question 31 on its own page

Question 32

+2 marksOne correct option

Consider the following flask code and answer the given subquestions.

python
from flask import Flask, request


app = Flask(__name__)


@app.route('/score')
def score():
    name = request.args.get('name', 'Guest')
    try:
        marks = int(request.args.get('marks', 0))
    except ValueError:
        return f"Invalid marks for {name}"


    if marks >= 90:
        grade = "A"
    elif marks >= 75:
        grade = "B"
    elif marks >= 60:
        grade = "C"
    else:
        grade = "F"


    return f"{name} scored {marks} and received grade {grade}"


app.run(debug=True)
  1. A

    Anya scored 59.5 and received grade F

  2. B

    Anya scored 0 and received grade F

  3. C

    Invalid marks for Anya

  4. D

    Anya scored 59 and received grade F

Show answer

Correct answer

  • C

    Invalid marks for Anya

Question 32 on its own page