What does the typeof operator return for an undefined variable?
A). undefined
B). number
C). boolean
D). string
What does typeof true evaluate to in JavaScript?
A). boolean
B). number
C). string
D). undefined
What does Number('123') return in JavaScript?
A). 123
B). '123'
C). NaN
D). 1
What does typeof new Date() evaluate to in JavaScript?
A). date
B). object
C). string
D). null
How does the typeof operator handle arrays in JavaScript?
A). array
B). object
C). undefined
D). null
What does typeof window.evaluate evaluate to in JavaScript?
A). function
B). object
C). string
D). undefined
How does JavaScript evaluate Boolean(0)?
A). 1
B). 0
C). null
D). undefined
What is the result of typeof NaN in JavaScript?
A). number
B). NaN
C). undefined
D). string
What is the result of typeof undefined in JavaScript?
A). undefined
B). string
C). null
D). object
How does JavaScript evaluate typeof /^regex$/ in JavaScript?
A). regexp
B). object
C). string
D). null