What does the expression typeof '123' return in JavaScript?
A). number
B). string
C). undefined
D). boolean
Which primitive data type represents textual data?
A). Number
B). String
C). Boolean
D). Undefined
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
What is the result of the expression typeof undefined 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
What is the result of the expression typeof 'Hello' 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
What does the expression typeof true return in JavaScript?
A). number
B). string
C). boolean
D). undefined
Which data type is represented by the value null in JavaScript?
A). Numeric data
B). Textual data
C). Absence of value
D). Logical value
What does the expression typeof null return in JavaScript?
A). number
B). string
C). object
D). boolean