Which primitive data type represents textual data?
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
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
Which primitive data type represents variables that have been explicitly set to represent no value?
A). Number
B). String
C). Undefined
D). Null
Which primitive data type in JavaScript represents integers and floating-point numbers?
A). Number
B). String
C). Boolean
D). Undefined
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
What is the result of the expression typeof undefined in JavaScript?
A). number
B). string
C). undefined
D). boolean
What is the result of the expression typeof 'Hello' 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