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

Answer & Solution

Answer: Option C
Solution:
The Undefined data type represents variables that have been declared but not assigned a value. It signifies that the variable exists in memory but doesn't hold any specific value yet.
Related Questions on Average

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

A). Number

B). String

C). Undefined

D). Null

What does the expression typeof '123' return in JavaScript?

A). number

B). string

C). undefined

D). boolean

How is the Symbol data type different from other primitive data types in JavaScript?

A). Symbols can be used as object keys

B). Symbols can be compared directly

C). Symbols can be used in mathematical operations

D). Symbols can be concatenated with strings

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

A). number

B). string

C). symbol

D). boolean

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 null return in JavaScript?

A). number

B). string

C). object

D). boolean

What does the Boolean data type represent in JavaScript?

A). Textual data

B). Numeric data

C). Logical values

D). Absence of value

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

A). Number

B). Symbol

C). Boolean

D). Undefined

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

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

A). Numeric data

B). Textual data

C). Absence of value

D). Logical value