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Modern Application Development II · Quiz 1 · 23 Feb 2025 · January 2025 term

Question 6: Consider the 4 JavaScript code snippets given below. Code…

Question 6

+3 marksOne correct option

Consider the 4 JavaScript code snippets given below.

Code Snippet 1:

javascript
let x = 10;
const y;

Code Snippet 2:

javascript
let { a: b } = undefined;

Code Snippet 3:

javascript
const arr = [1, 2];
arr = [3, 4];

Code Snippet 4:

javascript
const a = 10, b = 20;
(() => { return a + b; })();

Which of the above JavaScript code snippet(s) will throw an error?

  1. A

    1 and 2

  2. B

    1, 2 and 3

  3. C

    2, 3 and 4

  4. D

    All 4

Show answer

Correct answer

  • B

    1, 2 and 3

See the whole paperTake it as a mock test

Question 6 of 16 in the IIT Madras BS Modern Application Development II (MAD 2) Quiz 1 paper sat on 23 Feb 2025, in the January 2025 term (IIT M DIPLOMA AN EXAM QDD2 23 Feb 2025). It carries 3 marks.

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