What is the result of the expression typeof undefined in JavaScript?
A). number
B). string
C). undefined
D). boolean
What does the expression typeof 42 return in JavaScript?
A). number
B). string
C). undefined
D). boolean
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
What does the expression typeof true return in JavaScript?
A). number
B). string
C). boolean
D). undefined
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 have been explicitly set to represent no value?
A). Number
B). String
C). Undefined
D). Null
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 represents variables that have been explicitly set to have no value?
A). Number
B). Undefined
C). String
D). Null
What does the expression typeof '123' return in JavaScript?
A). number
B). string
C). undefined
D). boolean