Q
What will be the output of typeof undefined in JavaScript?

Answer & Solution

Answer: Option B
Solution:
The typeof operator in JavaScript returns the data type of a variable or expression. In this case, typeof undefined will return the string 'undefined', indicating that undefined is a data type in JavaScript.
Related Questions on Average

What will be the data type of the result when dividing a number by zero in JavaScript?

A). Infinity

B). NaN

C). Undefined

D). Null

Which data type is used to represent a unique identifier in JavaScript?

A). Identifier

B). Key

C). Object

D). Symbol

What is the data type of the value null in JavaScript?

A). Object

B). String

C). Null

D). Undefined

Which of the following is not a valid JavaScript data type?

A). Integer

B). Object

C). Symbol

D). NaN

Which data type is used to represent a list of elements in JavaScript?

A). List

B). Array

C). Tuple

D). Set

What will be the output of typeof NaN in JavaScript?

A). String

B). Number

C). NaN

D). Undefined

What is the data type of the value Infinity in JavaScript?

A). Number

B). String

C). Boolean

D). Null

Which of the following is a valid JavaScript data type for representing text?

A). Text

B). Character

C). String

D). Sentence

Which of the following is not a valid JavaScript variable name according to naming conventions?

A). myVariable

B). _myVariable

C). 2ndVariable

D). MyVariable

What data type is used to represent a collection of key-value pairs in JavaScript?

A). Object

B). Array

C). Map

D). Set