What will typeof NaN return?
A). number
B). NaN
C). undefined
D). object
Which operator checks both value and type for equality in JavaScript?
A). ==
B). !=
C). ===
D). !==
What is the output of '5' - 3?
A). 2
B). 2
C). 53
D). Error
What is the result of typeof Symbol('id')?
A). symbol
B). object
C). string
D). undefined
What is the output of '5' + 3?
A). 8
B). 53
C). 8
D). Error
Which of the following is not a primitive data type in JavaScript?
A). String
B). Number
C). Object
D). Boolean
What is the data type of 42 in JavaScript?
A). String
B). Boolean
C). Number
D). Object
What is the output of typeof null?
A). null
B). undefined
C). object
D). number
Which method can be used to convert a string to a number in JavaScript?
A). parseInt()
B). toString()
C). toNumber()
D). parseStr()
What is the output of typeof function() {}?
A). function
B). object
C). undefined
D). number