The IIT Madras BS Modern Application Development II (MAD 2) Quiz 1 paper sat on 19 Jul 2026, in the May 2026 term: 16 questions for 50 marks in 120 minutes. Every question is below with its answer. Take it as a timed mock test to be marked, or read it through first.
Consider running the following in Browser console:
Which of the following statements are correct?
The first line prints .
The second line prints .
will work in Browser by default because V8 provides the DOM.
Different runtimes (browser, Node.js, etc.) can provide different APIs even if they use the same JavaScript engine.
Correct answers
The first line prints .
Different runtimes (browser, Node.js, etc.) can provide different APIs even if they use the same JavaScript engine.
Which of the following are advantages of component-based frontend frameworks like Vue.js?
Code reusability
Better maintainability
Automatic SQL query optimization
Easier UI management
Correct answers
Code reusability
Better maintainability
Easier UI management
Which of the following cases is a function being used as a callback?
—
Correct answers
What is the correct output order for the following code?
1 2 3 4
1 4 2 3
2 1 4 3
4 1 2 3
Correct answer
1 4 2 3
A child component is initially visible using . The parent first updates a prop passed to the child, and then sets . After the child has already mounted once, which sequence can occur in the child after initial render?
-> -> ->
-> -> ->
-> -> ->
-> -> ->
Correct answer
-> -> ->
Consider the following JavaScript code snippet.
What will be the output of the above code on the browsers’ console?
50 50 60 40
50 50 60 60
50 30 60 60
50 30 60 40
Correct answer
50 30 60 60
Consider the following JavaScript code snippet.
What will be the output of the above code on the browsers’ console?
The European countries are Spain and Germany. The final numerical value is: 115.
The European countries are Italy and England. The final numerical value is: 65.
The European countries are Spain and Germany. The final numerical value is: 65.
The European countries are Italy and England. The final numerical value is: 115.
Correct answer
The European countries are Spain and Germany. The final numerical value is: 65.
Consider the following JavaScript code snippet.
What will be the output of the above code on the browsers’ console?
The selected elements are: Gold and Argon
The selected elements are: Aluminium and Silver
The selected elements are: Argon and Neon
The selected elements are: Gold and Neon
The selected elements are: Argon and Gold
Correct answer
The selected elements are: Gold and Argon
Which of the following Vue directives are correctly matched with their purpose?
v-show → fetching api
v-for → Iteration over lists
v-bind → Conditional rendering
v-model → Event handling only
Correct answer
v-for → Iteration over lists
Given the following parent-child setup in Vue 2:
and inside the child:
Which statements are correct?
flows from parent to child through props.
is a custom event sent from child to parent.
The child should directly change to update the parent source of truth.
If changes in the parent, the child can receive the updated prop value.
Correct answers
flows from parent to child through props.
is a custom event sent from child to parent.
If changes in the parent, the child can receive the updated prop value.
Identify the issue in the following Vue.js code:
Why does the value not update correctly when the button is clicked?
should be used instead of
Arrow functions do not bind their own
should be a function in all Vue instances
Vue.js does not support external methods
Correct answer
Arrow functions do not bind their own
Consider the following JavaScript code snippet.
Which of the following statements is/are correct?
will work correctly and return 8
will work correctly and return 8
will work correctly and return 15
will work correctly and return 15
Correct answers
will work correctly and return 8
will work correctly and return 15
Consider the following JavaScript code snippet.
What will be the output of the above code on the browsers’ console?
You are accessing: 45 You are accessing: 55
You are accessing: 25 You are accessing: 35
You are accessing: 25 You are accessing: 55
You are accessing: 45 You are accessing: 35
Correct answer
You are accessing: 25 You are accessing: 35
Consider the following JavaScript code snippet.
What will be the output of the above code on the browsers’ console in correct order?
undefined alpha beta delta Reference Error
zeta undefined beta delta Reference Error
undefined Reference Error beta charlie undefined
zeta Reference Error beta charlie undefined
Correct answer
undefined alpha beta delta Reference Error
Consider the following JavaScript code snippet.
What will be the output of the above code on the browsers’ console?
['gust', 'rch', 'ril']
['rch', 'ril', 'gust']
ril
rch
Correct answer
rch
Consider the following JavaScript code snippet.
What will be the output of the above code on the browsers’ console?
Program start First start First timeout First end Second start Second timeout Program end
Program start First start First end First timeout Second start Second timeout Program end
Program start First timeout First start First end Second timeout Second start Program end
Program start First start First end Second start Program end First timeout Second timeout
Correct answer
Program start First start First end Second start Program end First timeout Second timeout
