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

Answer & Solution

Answer: Option D
Solution:
The Symbol data type in JavaScript is used to represent a unique identifier, particularly useful for creating non-colliding property keys in objects or for defining unique constants.
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 the data type of the variable name be if it is assigned the value 'John Doe'?

A). Number

B). String

C). Boolean

D). Undefined

Which symbol is used to denote a comment in JavaScript?

A). //

B). --

C). #

D). /* ... */

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

A). Object

B). Null

C). Undefined

D). Boolean

What is the data type of the value 'null' (as a string) in JavaScript?

A). Object

B). String

C). Null

D). Undefined

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 null in JavaScript?

A). Object

B). String

C). Null

D). Undefined

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

A). Null

B). Undefined

C). NaN

D). Boolean

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