Explore topic-wise MCQs in JavaScript Questions & Answers Array and Related Methods.

This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your JavaScript Questions & Answers Array and Related Methods knowledge and support exam preparation. Choose a topic below to get started.

1.

The method or operator used to identify the array is __________

A. isarrayType()
B. ==
C. ===
D. typeof
Answer» E.
Discussion
2.

The reduce and reduceRight methods follow a common operation called __________

A. filter and fold
B. inject and fold
C. finger and fold
D. fold
Answer» C. finger and fold
Discussion
3.

The primary purpose of the array map() function is that it __________

A. maps the elements of another array into itself
B. passes each element of the array and returns the necessary mapped elements
C. passes each element of the array on which it is invoked to the function you specify, and returns an array containing the values returned by that function
D. pass the elements of the array into another array
Answer» D. pass the elements of the array into another array
Discussion
4.

The pop() method of the array does which of the following task?

A. decrements the total length by 1
B. increments the total length by 1
C. prints the first element but no effect on the length
D. updates the element
Answer» B. increments the total length by 1
Discussion