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 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
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 will typeof NaN return in JavaScript?
A). number
B). NaN
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 is the result of typeof [] in JavaScript?
A). array
B). object
C). list
D). undefined
Given let a = '10'; let b = 20;, what is the result of a + b?
A). 30
B). 1020
C). 30
D). NaN
What is the initial type of a variable declared with let a;?
A). null
B). number
C). undefined
D). object
Which type conversion happens automatically in the expression 3 + '5'?
A). Number to String
B). String to Number
C). Boolean to String
D). Number to Boolean
What will be the result of typeof function() {} in JavaScript?
A). function
B). object
C). undefined
D). method
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