Answer & Solution
Answer: Option A
Solution:
typeof null returns 'object', which is a historical bug in JavaScript.
Q
What will be the output of typeof null in JavaScript?
Related Questions on Average
What does Number('123') return in JavaScript?
A). 123
B). '123'
C). NaN
D). 1
How does JavaScript evaluate typeof 'Hello'?
A). string
B). object
C). undefined
D). null
What is the result of typeof undefined in JavaScript?
A). undefined
B). string
C). null
D). object
What does typeof true evaluate to in JavaScript?
A). boolean
B). number
C). string
D). undefined
How does the instanceof operator work in JavaScript?
A). Checks if an object has a specific prototype in its prototype chain.
B). Checks if two variables are of the same type.
C). Checks if a variable is null.
D). Checks if a variable is undefined.
What does the typeof operator return for an undefined variable?
A). undefined
B). number
C). boolean
D). string
What is the result of Boolean('false') in JavaScript?
A). 1
B). 0
C). NaN
D). null
What is the result of typeof NaN in JavaScript?
A). number
B). NaN
C). undefined
D). string
What does typeof new Date() evaluate to in JavaScript?
A). date
B). object
C). string
D). null
What will be the output of [] instanceof Array in JavaScript?
A). 1
B). 0
C). null
D). undefined