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

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

A). number

B). string

C). symbol

D). boolean

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

A). Number

B). Symbol

C). Boolean

D). Undefined

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

A). Number

B). String

C). Undefined

D). Null

Which primitive data type represents textual data?

A). Number

B). String

C). Boolean

D). Undefined

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

What does the Boolean data type represent in JavaScript?

A). Textual data

B). Numeric data

C). Logical values

D). Absence of value

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

A). number

B). string

C). undefined

D). boolean

Which of the following statements accurately describes the Boolean data type in JavaScript?

A). It represents textual data

B). It represents numeric data

C). It represents logical values

D). It represents an absence of value

What does the expression typeof null return in JavaScript?

A). number

B). string

C). object

D). boolean