What does the expression typeof 42 return in JavaScript?
A). number
B). string
C). undefined
D). boolean
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
What does the expression typeof Symbol() return in JavaScript?
A). number
B). string
C). symbol
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 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 have been explicitly set to represent no value?
A). Number
B). String
C). Undefined
D). Null
What does the expression typeof true return in JavaScript?
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
Which primitive data type represents variables that are declared but not initialized?
A). Number
B). String
C). Undefined
D). Null