Which primitive data type in JavaScript represents integers and floating-point numbers?
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
Which data type is represented by the value null in JavaScript?
A). Numeric data
B). Textual data
C). Absence of value
D). Logical value
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 true return in JavaScript?
A). number
B). string
C). boolean
D). undefined
What does the expression typeof Symbol() return in JavaScript?
A). number
B). string
C). symbol
D). boolean
Which data type represents variables that have been explicitly set to have no value?
A). Number
B). Undefined
C). String
D). Null
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 null return in JavaScript?
A). number
B). string
C). object
D). boolean
What does the expression typeof '123' return in JavaScript?
A). number
B). string
C). undefined
D). boolean