JavaScript Fundamentals Test Practice Questions - Programming

Question 1

What does the '===' operator check?

Accepted Answer

C) Both value and type equality

Answer

A) Value equality

Answer

B) Type equality

Answer

D) Reference equality

Question 2

Which method adds one or more elements to the end of an array?

Accepted Answer

A) push()

Answer

B) pop()

Answer

C) shift()

Answer

D) unshift()

Question 3

What will 'console.log(1 + '1')' output?

Accepted Answer

B) 11

Answer

A) 2

Answer

C) NaN

Answer

D) Error

Question 4

Which keyword is used to declare a variable with block scope?

Accepted Answer

D) Both B and C

Answer

A) var

Answer

B) let

Answer

C) const

Question 5

What does the 'this' keyword refer to in the global context?

Accepted Answer

B) The window object

Answer

A) The current function

Answer

C) undefined

Answer

D) null

Question 6

Which method converts a JSON string to a JavaScript object?

Accepted Answer

A) JSON.parse()

Answer

B) JSON.stringify()

Answer

C) JSON.convert()

Answer

D) JSON.toObject()