What will typeof NaN return?
A). number
B). NaN
C). undefined
D). object
What is the result of typeof undefined?
A). undefined
B). null
C). object
D). number
What is the data type of an array in JavaScript?
A). Array
B). Object
C). Collection
D). List
Which of the following is a falsy value in JavaScript?
A). 0
B).
C). null
D). All of the above
Which function can convert a number to a string in JavaScript?
A). toString()
B). parseInt()
C). String()
D). Number()
What is the output of '5' + 3?
A). 8
B). 53
C). 8
D). Error
What will typeof [1, 2, 3] return?
A). array
B). object
C). number
D). list
Which of the following is not a primitive data type in JavaScript?
A). String
B). Number
C). Object
D). Boolean
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