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 42 return in JavaScript?
A). number
B). string
C). undefined
D). boolean
What does the expression typeof Symbol() return in JavaScript?
A). number
B). string
C). symbol
D). boolean
Which primitive data type represents textual data?
A). Number
B). String
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
What does the expression typeof true return in JavaScript?
A). number
B). string
C). boolean
D). undefined
What does the expression typeof null return in JavaScript?
A). number
B). string
C). object
D). boolean
What is the result of the expression typeof 'Hello' in JavaScript?
A). number
B). string
C). undefined
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
Which data type represents variables that have been explicitly set to have no value?
A). Number
B). Undefined
C). String
D). Null