What is the result of the expression typeof undefined in JavaScript?
A). number
B). string
C). undefined
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
Which primitive data type represents textual data?
A). Number
B). String
C). Boolean
D). Undefined
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
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
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 does the expression typeof true return in JavaScript?
A). number
B). string
C). boolean
D). undefined
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