The IIT Madras BS Modern Application Development II (MAD 2) End Term paper sat on 10 May 2026, in the January 2026 term, set 1: 29 questions for 89.5 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.
Which of the following statements is true regarding the "this" keyword in JavaScript?
"this" in an arrow function refers to the global object.
"this" inside a regular function refers to the object that owns the function.
Arrow functions do not have their own "this" and inherit it from the surrounding scope.
"this" always points to the window object in browser environments.
Correct answer
Arrow functions do not have their own "this" and inherit it from the surrounding scope.
Consider the below JavaScript program.
What will be the output of the above program?
0
3
6
9
12
Correct answer
6
What is the main advantage of using JWT over session-based authentication?
JWTs require server-side storage for each session.
JWTs are stateless and eliminate the need for server-side session storage.
JWTs are longer and contain more data than session IDs.
JWTs automatically handle token expiration without additional logic.
Correct answer
JWTs are stateless and eliminate the need for server-side session storage.
Which of the following HTTP methods does WebSocket use for initial handshake?
GET
POST
PUT
DELETE
Correct answer
GET
You are building a cricket analytics app. The file battingStats.js contains the following exports:
In another file app.js, which of the following import statements will correctly import both strikeRate and playerName ? ( Assume both files are in the same directory )
Correct answer
Encryption keys used to secure the token
User-related data (claims) such as identity and expiration time
The algorithm used for signing the token
The hashed signature of the token
Correct answer
User-related data (claims) such as identity and expiration time
Consider the below JavaScript program.
What will be the output of the above program?
Success!
Error!
Success! Error!
Error! Success!
Correct answer
Success!
Consider the below Vuex store configuration:
If the addItemAsync action is dispatched with the item 'React', what will be the state of items after 2 seconds?
['Angular', 'Vue']
['Angular', 'Vue', 'React']
['React']
['Angular']
Correct answer
['Angular', 'Vue', 'React']
Consider the below Vue app.
What happens when the user navigates to an undefined route like "/random"?
Browser navigates to /random and shows a blank page.
Browser navigates to /random but renders nothing.
Browser redirects to /about and displays "About".
Error: No matching route.
Correct answer
Browser redirects to /about and displays "About".
What will be the output of the following JavaScript code?
number, object, false, false
NaN, null, true, true
number, object, true, false
NaN, null, false, false
Correct answer
number, object, false, false
What happens when this Flask caching code runs?
If requests for user IDs 1, 2, 1 are made within 5 minutes, what's the total response time?
15 seconds
10 seconds
5 seconds
0 seconds
Correct answer
10 seconds
Consider the following JavaScript program:
What will be printed in the console when the above code is executed?
Passed [75,75,63]
Failed [0,0,0]
Failed [75,75,63]
Passed [0,0,0]
Correct answer
Failed [75,75,63]
Match the Vue directive in Directive with its correct functionality in Description using Vue.js.
1–A, 2–D, 3–C, 4–B
1–D, 2–B, 3–C, 4–A
1–B, 2–C, 3–D, 4–A
1–B, 2–D, 3–C, 4–A
Correct answer
1–B, 2–D, 3–C, 4–A
In a Single Page Application (SPA), what are the benefits of client-side routing over server-side routing?
Slower navigation between pages
Reduced load on the backend server
Better SEO performance by default
Seamless page transitions without full reloads
Correct answers
Reduced load on the backend server
Better SEO performance by default
Which of the following is the correct statement?
Cookie size can impact the website performance.
Cookie size does not affect performance in any practical/meaningful sense.
A request to static.example.com will include cookies set for example.com.
A request to static.example.com will not include cookies set for example.com.
Correct answers
Cookie size does not affect performance in any practical/meaningful sense.
A request to static.example.com will include cookies set for example.com.
Consider the following Vue application with markup index.html and JavaScript file app.js.
Suppose the application is running on http://127.0.0.1:8080. What will be rendered by the browser?
Status: Initial -> Created -> Ready -> Mounted -> Done Value: 13
Status: Initial -> Ready -> Mounted -> Done Value: 8
Status: Initial -> Created -> Mounted -> Ready -> Done Value: 14
Status: Initial -> Mounted -> Ready -> Done Value: 9
Correct answer
Status: Initial -> Mounted -> Ready -> Done Value: 9
Consider the following endpoints created with a working setup of flask-security and flask-sqlalchemy.
Three requests are made to this application: GET /api/open (no authentication headers)1. GET /api/secure (no authentication headers)2. GET /api/superuser with valid authentication token but user has role 'basic' (not 'superuser')3. What will be the response status codes for these requests, respectively?
200, 200, 200
200, 401, 403
200, 403, 401
401, 403, 403
Correct answer
200, 401, 403
Consider the following code snippet running in a browser. What will be the output on the console?
Ambrane 20 50 30
Polycab 50 50 30
Ambrane 50 50 30
Ambrane 50 30 30
Correct answer
Ambrane 50 50 30
Consider the following code snippet running on a browser. What is the output on the console?
100 100 100
100 undefined 100
undefined undefined undefined
100 undefined undefined
Correct answer
100 undefined undefined
Consider the flask application app.py and an HTML file index.html:
If a user visit index.html at 10:10:10 AM, what will be logged in the console?
20, 50
20, 40
40, 40
50, 50
Correct answer
20, 40
Which of the following statement(s) is/are true about GraphQL?
Mutations in GraphQL can be used to change the underlying data store.
GraphQL services are created by defining types and fields of those types, then providing functions for each field.
GraphQL can only fetch data from a single source.
GraphQL allows only GET operations.
Correct answers
Mutations in GraphQL can be used to change the underlying data store.
GraphQL services are created by defining types and fields of those types, then providing functions for each field.
Consider the following code:
None of these
Correct answers
Hamza is working on a project using Git and performs the following operations: Creates a new branch and switches to it1. Stages changes for commit2. Commits changes with a message3. Pushes the branch to a remote repository4. Which of the following commands are correctly used for these operations?
Correct answers
Prerna and Swathy are using a web application built with Vue.js for the BS Degree program. When the page loads, the sidebar content appears instantly• However, when they click on an Assignments link, the main content takes noticeable time to load • A simplified version of the component is shown below:
Which of the following statements correctly explain why the Assignments page takes time to load?
The sidebar is likely part of a parent component and is already rendered before the API call
The Assignments component waits for the API response before displaying data
Vue blocks rendering of all components until API calls complete
The delay is caused because data is fetched asynchronously after the component is created
Correct answers
The sidebar is likely part of a parent component and is already rendered before the API call
The Assignments component waits for the API response before displaying data
The delay is caused because data is fetched asynchronously after the component is created
Consider the following Vue.js application:
Based on the above data, answer the given subquestions.
How many times will "computed run" be logged in the console during the initial render?
0
1
Multiple times due to the loop
Depends on user interaction
Correct answer
1
Consider the following Vue.js application:
Based on the above data, answer the given subquestions.
What will happen when the button is clicked?
Only time will update
Vue will throw an error
Correct answer
Consider the following Vue.js application:
Based on the above data, answer the given subquestions.
Computed properties are always faster than methods
Methods cannot access data properties
Computed properties are cached based on their dependencies
Computed properties run only once
Correct answer
Computed properties are cached based on their dependencies
Consider the following Vue 2 application:
What happens immediately after clicking "Item 2"?
The route changes, but neither watcher nor lifecycle hooks run
A new Vue instance is created for the route
Correct answer
Consider the following Vue 2 application:
Because Vue Router always recreates components on navigation
Because lifecycle hooks run on every URL change regardless of reactivity
Because router-view forces a full re-render of the component tree
Because a watched route parameter updates parent reactive state, triggering a component update
Correct answer
Because a watched route parameter updates parent reactive state, triggering a component update
