Consider the below JavaScript program. Array.prototype.double = function (arr) { const res = []; for (let i=0; i<placeholder.length; i++) res.push(placeholder[i] 2); return res; } const arr = [2, 3, 7, 8]; console.log(arr.double()); What of the following can be used in place of “placeholder” in the above program so that the program yields the below output array? [ 4, 6, 14, 16 ]

(D) The program cannot yield such an output, and is implemented in a wrong way.

Modern Application Development II · End Term · 28 Apr 2024 · January 2024 term

Question 26: Consider the below JavaScript program. What of the follo…

Question 26

+4.5 marksOne correct option

Consider the below JavaScript program.

javascript

1Array.prototype.double = function (arr) {
2    const res = [];
3    for (let i=0; i<placeholder.length; i++)
4        res.push(placeholder[i] * 2);
5    return res;
6}
7
8const arr = [2, 3, 7, 8];
9console.log(arr.double());

What of the following can be used in place of “placeholder” in the above program so that the program yields the below output array?

[ 4, 6, 14, 16 ]

A
arr
B
Array
C
this
D
The program cannot yield such an output, and is implemented in a wrong way.

Show answer

Correct answer

C
this

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Question 26 of 32 in the IIT Madras BS Modern Application Development II (MAD 2) End Term paper sat on 28 Apr 2024, in the January 2024 term (IIT M FOUNDATION DIPLOMA AN EXAM QDF3 28 Apr 2024). It carries 4.5 marks.

Question 26: Consider the below JavaScript program. What of the follo…

Question 26

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