What is the result of typeof Symbol('id')?
A). symbol
B). object
C). string
D). undefined
Which method can be used to convert a string to a number in JavaScript?
A). parseInt()
B). toString()
C). toNumber()
D). parseStr()
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 output of typeof function() {}?
A). function
B). object
C). undefined
D). number
What is the data type of 42 in JavaScript?
A). String
B). Boolean
C). Number
D). Object
What is the output of '5' + 3?
A). 8
B). 53
C). 8
D). Error
What is the result of null === undefined?
A). 1
B). 0
C). Error
D). NaN
Which operator checks both value and type for equality in JavaScript?
A). ==
B). !=
C). ===
D). !==
Which of the following is not a primitive data type in JavaScript?
A). String
B). Number
C). Object
D). Boolean