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May 2025 term · Modern Application Development I · BSCS2003

Modern Application Development I End Term: 31 August 2025, Set QDB3 (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 QDB3: 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
25
MSQ
7
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
  1. A

    Riya

  2. B

    Name stored in database

  3. C

    None

  4. D

    Error

Show answer

Correct answer

  • A

    Riya

Question 1 on its own page

Question 2

+2 marksOne correct option

What does SQLAlchemy's lazy='dynamic' do?

  1. A

    Loads extra content of all the tables

  2. B

    Returns a query object that can be filtered

  3. C

    Loads all related records immediately

  4. D

    Forces join queries at once

Show answer

Correct answer

  • B

    Returns a query object that can be filtered

Question 2 on its own page

Question 3

+2 marksOne correct option

Why is using the GET method for sensitive data discouraged?

  1. A

    GET encrypts the URL

  2. B

    Data becomes part of browser history and URL

  3. C

    It uses a separate request header

  4. D

    Flask doesn’t support GET by default

Show answer

Correct answer

  • B

    Data becomes part of browser history and URL

Question 3 on its own page

Question 4

+2 marksOne correct option

You define two routes in your Flask app as:

python
@app.route('/home')
def home():
    return "Home No Slash"


@app.route('/about/')
def about():
    return "About With Slash"

A user visits /about (without the trailing slash). What will Flask do?

  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

A login form doesn't show any message when users enter wrong credentials. Which Nielsen heuristic is violated?

  1. A

    Aesthetic and minimalist design

  2. B

    Visibility of system status

  3. C

    Error prevention

  4. D

    Recognition rather than recall

Show answer

Correct answer

  • B

    Visibility of system status

Question 5 on its own page

Question 6

+2 marksOne or more correct options

Which of the following are handled by the browser and not the Flask server?

Select all that apply.

  1. A

    Parsing HTML

  2. B

    Auto-filling saved form data

  3. C

    URL routing

  4. D

    JavaScript execution

Show answer

Correct answers

  • A

    Parsing HTML

  • B

    Auto-filling saved form data

  • D

    JavaScript execution

Question 6 on its own page

Question 7

+3 marksOne correct option

Consider the following git branches for a remote repository.

text
  feature1
* feature2
  main

Choose the correct git command sequence to merge feature1 and feature2 into the main branch.

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

Correct answer

  • C
Question 7 on its own page

Question 8

+3 marksOne correct option
  1. A
  2. B
  3. C
  4. D
Show answer

Correct answer

  • D
Question 8 on its own page

Question 9

+3 marksOne correct option

What will be displayed when running python app.py 8080 for the following script?

app.py

python
import sys
port = int(sys.argv[1]) if len(sys.argv) > 1 else 5000
print(f"Server running on port {port}")
  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 Flask code.

python
from flask import Flask
import sys


app = Flask(__name__)


# Read multiplier from command-line
MULTIPLIER = int(sys.argv[1]) if len(sys.argv) > 1 else 1


@app.route('/multiply/<int:number>')
def multiply(number):
    return f"Result: {number % MULTIPLIER}"


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

What will be the output when you run the following code in the terminal python app.py 5 and then access in the browser with the following link http://localhost:5000/multiply/4 ?

  1. A

    Result: 20

  2. B

    Result: 1

  3. C

    Result: 5

  4. D

    Result: 4

Show answer

Correct answer

  • D

    Result: 4

Question 10 on its own page

Question 11

+3 marksOne correct option

Consider the following Python code

File name: main_test.py

python
import pytest


class TestGroup:


   def do_something(self, x, y):
       return x % y


   def test_one(self):
       assert self.do_something(10, 5) == 0, " Is 5 factor of 10? "


   def test_two(self):
       assert self.do_something(32, 5) == 0, " Is 5 factor of 32 "

What will be the output of running the above python script using command line “pytest -v main_test.py”?

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

Correct answer

  • A
Question 11 on its own page

Question 12

+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

  • D
Question 12 on its own page

Question 13

+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 13 on its own pageAlso asked in End Term 31 Aug 2025

Question 14

+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

  • C
Question 14 on its own page

Question 15

+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

  • D
Question 15 on its own page

Question 16

+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

  • C
Question 16 on its own page

Question 17

+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-c, 4-a, 5-b

  4. D

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

Show answer

Correct answer

  • D

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

Question 17 on its own page

Question 18

+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

  • B
Question 18 on its own page

Question 19

+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
  2. B
  3. C
  4. D
Show answer

Correct answer

  • B
Question 19 on its own page

Question 20

+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

  • C
Question 20 on its own page

Question 21

+4.5 marksOne correct option

Consider the following Python code snippet:

python: app.py

python
from string import Template
from jinja2 import Template as JinjaTemplate
import sys


mode = sys.argv[1]
data = {"user": "Bob", "language": "JavaScript", "project": "web app", "status": "completed"}


template_str = "Hello ${user}! Your {{project}} written in {{language}} is ${status}."


if mode == "hybrid":
    str_template = Template(template_str)
    intermediate = str_template.substitute(data)
    jinja_template = JinjaTemplate(intermediate)
    result = jinja_template.render(data)
    print(result)
else:
    jinja_template = JinjaTemplate(template_str)
    result = jinja_template.render(data)
    print(result)

What will be printed on the terminal for the command: python app.py hybrid ?

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

Correct answer

  • C
Question 21 on its own page

Question 22

+3 marksOne or more correct options

Consider the following Flask app code.

python
from flask import Flask
from flask_restful import Resource, Api


app = Flask(__name__)
api = Api(app)


class MyApiResource(Resource):
   def get(self):
       return {"response": "GET"}, 200


   def post(self, value):
       return {"response": "POST", "value": value}, 200


api.add_resource(MyApiResource, "/", "/<int:value>")


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

The above flask app is running on “http://127.0.0.1:5000”. Which of the following commands will return a runtime error?

Select all that apply.

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

Correct answers

  • A
  • C
Question 22 on its own page

Question 23

+3 marksOne or more correct options

Select all that apply.

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

Correct answers

  • A
  • 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

  • C
  • 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

  • C
  • D
Question 25 on its own page

Question 26

+4.5 marksOne or more correct options

Consider the following Flask application.

python
from flask import Flask, abort, request
app = Flask(__name__)


courses = {
    "IT2001": "Web Development",
    "IT2002": "Database Systems",
    "IT2003": "Software Engineering",
    "IT2004": "Data Structures"
}


@app.route('/course')
def get_course():
    course_id = request.args.get('id')
    level = request.args.get('level', 'beginner')


    if not course_id:
        abort(400, "Bad Request: Course ID is required")


    if course_id not in courses:
        abort(404, "Not Found: Course does not exist")
    return f'<h2>{courses[course_id]} - Level: {level.title()}</h2>'


@app.route('/search')
def search_courses():
    query = request.args.get('q')
    min_length = int(request.args.get('min', 3))
    if not query or len(query) < min_length:
        abort(422, "Unprocessable Entity: Query too short")


    results = [name for name in courses.values() if query.lower() in name.lower()]
    if not results:


        return '<p>No courses found</p>'


    return f'<ul>{"".join([f"<li>{course}</li>" for course in results])}</ul>'


app.run(debug=True)

Based on the above data, answer the given subquestions.

Select all that apply.

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

Correct answers

  • A
  • C
  • D
Question 26 on its own page

Question 27

+3 marksOne or more correct options

Consider the following Flask application.

python
from flask import Flask, abort, request
app = Flask(__name__)


courses = {
    "IT2001": "Web Development",
    "IT2002": "Database Systems",
    "IT2003": "Software Engineering",
    "IT2004": "Data Structures"
}


@app.route('/course')
def get_course():
    course_id = request.args.get('id')
    level = request.args.get('level', 'beginner')


    if not course_id:
        abort(400, "Bad Request: Course ID is required")


    if course_id not in courses:
        abort(404, "Not Found: Course does not exist")
    return f'<h2>{courses[course_id]} - Level: {level.title()}</h2>'


@app.route('/search')
def search_courses():
    query = request.args.get('q')
    min_length = int(request.args.get('min', 3))
    if not query or len(query) < min_length:
        abort(422, "Unprocessable Entity: Query too short")


    results = [name for name in courses.values() if query.lower() in name.lower()]
    if not results:


        return '<p>No courses found</p>'


    return f'<ul>{"".join([f"<li>{course}</li>" for course in results])}</ul>'


app.run(debug=True)

Based on the above data, answer the given subquestions.

Analyze the following URLs and their expected behaviors. Which statement is CORRECT?

Select all that apply.

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

Correct answers

  • C
  • D
  • E
Question 27 on its own page

Question 28

+4.5 marksOne correct option

Consider the following Flask-RESTful resource class for a student management system:

python
class StudentResource(Resource):
    def get(self, student_id=None):
        if student_id:
            return {"message": "Student details", "id": student_id}, 200
        return {"message": "All students"}, 200


    def post(self):
        parser = reqparse.RequestParser()
        parser.add_argument('name', required=True, help='Name is required')
        parser.add_argument('age', type=int, required=True, help='Age is required')
        args = parser.parse_args()
        return {"message": "Student created", "data": args}, 201


    def put(self, student_id):
        return {"message": "Student updated", "id": student_id}, 200


    def delete(self, student_id):
        return {"message": "Student deleted", "id": student_id}, 204


class CourseResource(Resource):
    def get(self, course_code):
        return {"course": course_code, "status": "active"}, 200


    def post(self, course_code, student_id):
        return {
            "message": "Student enrolled",
            "course": course_code,
            "student_id": student_id
        }, 201




api.add_resource(StudentResource, '/students', '/students/<int:student_id>')
api.add_resource(CourseResource, '/courses/<string:course_code>',
                 '/courses/<string:course_code>/enroll/<int:student_id>')


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

Based on the above data, answer the given subquestions.

  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-RESTful resource class for a student management system:

python
class StudentResource(Resource):
    def get(self, student_id=None):
        if student_id:
            return {"message": "Student details", "id": student_id}, 200
        return {"message": "All students"}, 200


    def post(self):
        parser = reqparse.RequestParser()
        parser.add_argument('name', required=True, help='Name is required')
        parser.add_argument('age', type=int, required=True, help='Age is required')
        args = parser.parse_args()
        return {"message": "Student created", "data": args}, 201


    def put(self, student_id):
        return {"message": "Student updated", "id": student_id}, 200


    def delete(self, student_id):
        return {"message": "Student deleted", "id": student_id}, 204


class CourseResource(Resource):
    def get(self, course_code):
        return {"course": course_code, "status": "active"}, 200


    def post(self, course_code, student_id):
        return {
            "message": "Student enrolled",
            "course": course_code,
            "student_id": student_id
        }, 201




api.add_resource(StudentResource, '/students', '/students/<int:student_id>')
api.add_resource(CourseResource, '/courses/<string:course_code>',
                 '/courses/<string:course_code>/enroll/<int:student_id>')


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

Based on the above data, answer the given subquestions.

Consider the following HTTP requests to the same Flask-RESTful application.

What will be the response status code for each request?

Request 1: curl http://127.0.0.1:5000/students -X POST -d "name=Ashish"

Request 2: curl http://127.0.0.1:5000/courses/CS101/enroll/456 -X POST

Request 3: curl http://127.0.0.1:5000/students/789 -X DELETE

  1. A

    Request 1: 400, Request 2: 201, Request 3: 204

  2. B

    Request 1: 201, Request 2: 201, Request 3: 204

  3. C

    Request 1: 400, Request 2: 405, Request 3: 204

  4. D

    Request 1: 201, Request 2: 405, Request 3: 200

Show answer

Correct answer

  • A

    Request 1: 400, Request 2: 201, Request 3: 204

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

    Alex scored eighty and received grade F

  3. C

    Error 500: Internal Server Error

  4. D

    Invalid marks for Alex

Show answer

Correct answer

  • D

    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 0 and received grade F

  3. C

    Guest scored 88 and received grade B

  4. D

    Invalid marks for Guest

Show answer

Correct answer

  • C

    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

    Invalid marks for Anya

  3. C

    Anya scored 0 and received grade F

  4. D

    Anya scored 59 and received grade F

Show answer

Correct answer

  • B

    Invalid marks for Anya

Question 32 on its own page