JavaScript MCQ Questions with answers and solutions Page 40

Q. When will the browser invoke the handler?

(A) Program begins
(B) Any event occurs
(C) Specified event occurs
(D) None of the above

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✅ Correct Answer: (C) Specified event occurs

Published by Ram Sharma ⭐ 193.88K Points at 12-Jul-2022 11:37 pm in JavaScript

Q. An _______ is a special variable, which can hold more than one value

(A) string
(B) integer
(C) character
(D) array

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✅ Correct Answer: (D) array

Published by Ram Sharma ⭐ 193.88K Points at 12-Jul-2022 11:37 pm in JavaScript

Q. It is a common practice to declare arrays with the _________ keyword.

(A) var
(B) let
(C) const
(D) none of the above

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✅ Correct Answer: (C) const

Published by Ram Sharma ⭐ 193.88K Points at 12-Jul-2022 11:38 pm in JavaScript

Q. Spaces and line breaks are not important.

(A) True
(B) False
(C) Can be true or false
(D) Can not say

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✅ Correct Answer: (A) True

Published by Ram Sharma ⭐ 193.88K Points at 12-Jul-2022 11:38 pm in JavaScript

Q. Array indexes start with ______.

(A) -1
(B) 0
(C) 1
(D) Can not say

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✅ Correct Answer: (B) 0

Published by Ram Sharma ⭐ 193.88K Points at 12-Jul-2022 11:38 pm in JavaScript

Q. The ________ operator in JavaScript returns "object" for arrays.

(A) typeof
(B) not
(C) or
(D) and

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✅ Correct Answer: (A) typeof

Published by Ram Sharma ⭐ 193.88K Points at 12-Jul-2022 11:39 pm in JavaScript

Q. What is true about Arrays?

(A) JavaScript does not support associative arrays
(B) You should use objects when you want the element names to be strings
(C) You should use arrays when you want the element names to be numbers
(D) All of the above

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✅ Correct Answer: (D) All of the above

Published by Ram Sharma ⭐ 193.88K Points at 12-Jul-2022 11:39 pm in JavaScript

Q. The easiest way to add a new element to an array is using the _________ method

(A) set()
(B) push()
(C) insert()
(D) add()

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✅ Correct Answer: (B) push()

Published by Ram Sharma ⭐ 193.88K Points at 12-Jul-2022 11:40 pm in JavaScript

Q. The _______ method also joins all array elements into a string.

(A) shift()
(B) pop()
(C) join()
(D) toString()

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✅ Correct Answer: (C) join()

Published by Ram Sharma ⭐ 193.88K Points at 12-Jul-2022 11:40 pm in JavaScript

Q. Array elements can be deleted using the JavaScript operator?

(A) pop
(B) shift
(C) delete
(D) All of the above

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✅ Correct Answer: (D) All of the above

Published by Ram Sharma ⭐ 193.88K Points at 12-Jul-2022 11:41 pm in JavaScript

JavaScript MCQs with answers Page - 40

Q. When will the browser invoke the handler?

Q. An _______ is a special variable, which can hold more than one value

Q. It is a common practice to declare arrays with the _________ keyword.

Q. Spaces and line breaks are not important.

Q. Array indexes start with ______.

Q. The ________ operator in JavaScript returns "object" for arrays.

Q. What is true about Arrays?

Q. The easiest way to add a new element to an array is using the _________ method

Q. The _______ method also joins all array elements into a string.

Q. Array elements can be deleted using the JavaScript operator?

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