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