Answer & Solution
Answer: Option A
Solution:
The typeof operator returns a string indicating the type of the unevaluated operand.
Q
Which operator is used to determine the type of a variable in JavaScript?
Related Questions on Average
What does it mean that JavaScript is dynamically typed?
A). Variables do not have types
B). Variables can change type
C). Variables must be declared with a type
D). Variables cannot change type
What does the isNaN function do?
A). Checks if a value is not a number
B). Converts a value to a number
C). Checks if a value is a number
D). Converts a value to NaN
What is the initial type of a variable declared with let a;?
A). null
B). number
C). undefined
D). object
What is the type of the value returned by parseFloat('3.14abc')?
A). number
B). string
C). NaN
D). undefined
What will typeof null return in JavaScript?
A). null
B). undefined
C). object
D). number
What does the parseInt function do in JavaScript?
A). Converts a number to a string
B). Converts a string to an integer
C). Converts a boolean to a number
D). Converts an array to a number
Given let a = '10'; let b = 20;, what is the result of a + b?
A). 30
B). 1020
C). 30
D). NaN
Which of the following values is considered falsy in JavaScript?
A). 1
B). 0
C). 0
D). {}
What will typeof NaN return in JavaScript?
A). number
B). NaN
C). undefined
D). object
Given the code: let y = 10; y = true;, what is the type of y after execution?
A). number
B). boolean
C). string
D). object