What will typeof NaN return?
A). number
B). NaN
C). undefined
D). object
What will typeof [1, 2, 3] return?
A). array
B). object
C). number
D). list
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 data type of an array in JavaScript?
A). Array
B). Object
C). Collection
D). List
Which of the following is not a primitive data type in JavaScript?
A). String
B). Number
C). Object
D). Boolean
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 null === undefined?
A). 1
B). 0
C). Error
D). NaN
What is the output of typeof null?
A). null
B). undefined
C). object
D). number
What is the data type of true in JavaScript?
A). String
B). Boolean
C). Number
D). Object