Which primitive data type in JavaScript represents integers and floating-point numbers?
A). Number
B). String
C). Boolean
D). Undefined
What is the result of the expression typeof undefined in JavaScript?
A). number
B). string
C). undefined
D). boolean
What does the expression typeof Symbol() return in JavaScript?
A). number
B). string
C). symbol
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 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
What does the Boolean data type represent in JavaScript?
A). Textual data
B). Numeric data
C). Logical values
D). Absence of value
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
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
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