Which primitive data type in JavaScript represents integers and floating-point numbers?
A). Number
B). String
C). Boolean
D). Undefined
What does the expression typeof '123' return in JavaScript?
A). number
B). string
C). undefined
D). boolean
Which primitive data type represents unique identifiers introduced in ECMAScript 6?
A). Number
B). Symbol
C). Boolean
D). Undefined
What does the expression typeof Symbol() return in JavaScript?
A). number
B). string
C). symbol
D). boolean
Which primitive data type represents variables that are declared but not initialized?
A). Number
B). String
C). Undefined
D). Null
What does the expression typeof null return in JavaScript?
A). number
B). string
C). object
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 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
Which data type represents variables that have been explicitly set to have no value?
A). Number
B). Undefined
C). String
D). Null