Q
Which data type is used to represent the absence of a value in JavaScript?

Answer & Solution

Answer: Option B
Solution:
The Undefined data type in JavaScript is used to represent the absence of a value, typically when a variable has been declared but not yet assigned a value.
Related Questions on Average

Which of the following data types is used to represent a function in JavaScript?

A). Func

B). Function

C). Method

D). Procedure

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

A). Object

B). Null

C). Undefined

D). Boolean

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

A). myVariable

B). _myVariable

C). 2ndVariable

D). MyVariable

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

A). Object

B). String

C). Null

D). Undefined

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

A). Null

B). String

C). Number

D). Boolean

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

A). Object

B). Array

C). Map

D). Set

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

A). List

B). Array

C). Tuple

D). Set

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

A). Identifier

B). Key

C). Object

D). Symbol

What will be the output of typeof undefined in JavaScript?

A). String

B). Undefined

C). Null

D). Object

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

A). Number

B). String

C). Boolean

D). Null