What is the data type of 42 in JavaScript?
A). String
B). Boolean
C). Number
D). Object
Which of the following is not a primitive data type in JavaScript?
A). String
B). Number
C). Object
D). Boolean
Which method can be used to convert a string to a number in JavaScript?
A). parseInt()
B). toString()
C). toNumber()
D). parseStr()
Which operator checks both value and type for equality in JavaScript?
A). ==
B). !=
C). ===
D). !==
What will typeof NaN return?
A). number
B). NaN
C). undefined
D). object
What is the result of null == undefined?
A). 1
B). 0
C). Error
D). NaN
What is the data type of an array in JavaScript?
A). Array
B). Object
C). Collection
D). List
What will typeof [1, 2, 3] return?
A). array
B). object
C). number
D). list
What is the result of null === undefined?
A). 1
B). 0
C). Error
D). NaN
What is the output of '5' - 3?
A). 2
B). 2
C). 53
D). Error