Which data type represents variables that have been explicitly set to have no value?

Which data type is represented by the value null in JavaScript?

A). Numeric data

B). Textual data

C). Absence of value

D). Logical value

Which primitive data type represents unique identifiers introduced in ECMAScript 6?

A). Number

B). Symbol

C). Boolean

D). Undefined

What does the expression typeof true return in JavaScript?

A). number

B). string

C). boolean

D). undefined

Which primitive data type represents textual data?

A). Number

B). String

C). Boolean

D). Undefined

What does the expression typeof Symbol() return in JavaScript?

A). number

B). string

C). symbol

D). boolean

What is the result of the expression typeof 'Hello' in JavaScript?

A). number

B). string

C). undefined

D). boolean

Which primitive data type represents variables that are declared but not initialized?

A). Number

B). String

C). Undefined

D). Null

What is the purpose of the Null data type in JavaScript?

A). To represent numeric values

B). To represent an intentional absence of value

C). To represent textual data

D). To represent logical values

How is the Undefined data type different from the Null data type in JavaScript?

A). Undefined represents an intentional absence of value

B). Null represents variables not initialized

C). Undefined is used for object keys

D). Null is used for mathematical operations

What does the expression typeof 42 return in JavaScript?

A). number

B). string

C). undefined

D). boolean