Q
How does the instanceof operator work in JavaScript?

Answer & Solution

Answer: Option A
Solution:
The instanceof operator checks if an object has a specific prototype in its prototype chain.
Related Questions on Average

How does JavaScript evaluate typeof 'Hello'?

A). string

B). object

C). undefined

D). null

What is the result of typeof undefined in JavaScript?

A). undefined

B). string

C). null

D). object

What does typeof true evaluate to in JavaScript?

A). boolean

B). number

C). string

D). undefined

What does Number('123') return in JavaScript?

A). 123

B). '123'

C). NaN

D). 1

How does JavaScript evaluate Boolean(0)?

A). 1

B). 0

C). null

D). undefined

How does JavaScript evaluate typeof /^regex$/ in JavaScript?

A). regexp

B). object

C). string

D). null

How does the typeof operator handle arrays in JavaScript?

A). array

B). object

C). undefined

D). null

How does the instanceof operator behave with primitive values in JavaScript?

A). Throws an error

B). Returns true for all primitive values

C). Returns false for all primitive values

D). Primitive values cannot be used with instanceof

What will be the output of typeof null in JavaScript?

A). object

B). null

C). undefined

D). string

What will be the output of typeof {} in JavaScript?

A). object

B). array

C). null

D). undefined