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 typeof function() {}?
A). function
B). object
C). undefined
D). number
Which function can convert a number to a string in JavaScript?
A). toString()
B). parseInt()
C). String()
D). Number()
Which method can be used to convert a string to a number in JavaScript?
A). parseInt()
B). toString()
C). toNumber()
D). parseStr()
Which of the following is a falsy value in JavaScript?
A). 0
B).
C). null
D). All of the above
What is the output of '5' + 3?
A). 8
B). 53
C). 8
D). Error
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
What is the result of typeof Symbol('id')?
A). symbol
B). object
C). string
D). undefined