What does the expression typeof true return in JavaScript?
A). number
B). string
C). boolean
D). undefined
Which primitive data type represents variables that are declared but not initialized?
A). Number
B). String
C). Undefined
D). Null
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 does the expression typeof 42 return in JavaScript?
A). number
B). string
C). undefined
D). boolean
What does the Boolean data type represent in JavaScript?
A). Textual data
B). Numeric data
C). Logical values
D). Absence of value
What does the expression typeof Symbol() return in JavaScript?
A). number
B). string
C). symbol
D). boolean
Which data type is represented by the value null in JavaScript?
A). Numeric data
B). Textual data
C). Absence of value
D). Logical value
Which data type represents variables that have been explicitly set to have no value?
A). Number
B). Undefined
C). String
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
What does the expression typeof '123' return in JavaScript?
A). number
B). string
C). undefined
D). boolean