JavaScript Array MCQ Questions & Answer

Javascript (JS) Array MCQs : This section focuses on the "Javascript Array". These Multiple Choice Questions (MCQs) should be practiced to improve the Javascript skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.

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

A. string
B. integer
C. character
D. array

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2. 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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3. Spaces and line breaks are not important.

C. Can be true or false
D. Can not say

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4. Array indexes start with ______.

A. -1
B. 0
C. 1
D. Can not say

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

A. and
B. or
C. not
D. typeof

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

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

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

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

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

A. pop
B. shift
C. delete
D. All of the above

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10. arrays always use numbered indexes.

A. Yes
B. No
C. Can be yes or no
D. Can not say

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