What is the data type of true in JavaScript?
A). String
B). Boolean
C). Number
D). Object
Which method can be used to convert a string to a number in JavaScript?
A). parseInt()
B). toString()
C). toNumber()
D). parseStr()
What is the result of null === undefined?
A). 1
B). 0
C). Error
D). NaN
Which function can convert a number to a string in JavaScript?
A). toString()
B). parseInt()
C). String()
D). Number()
Which of the following is not a primitive data type in JavaScript?
A). String
B). Number
C). Object
D). Boolean
What is the output of '5' - 3?
A). 2
B). 2
C). 53
D). Error
How do you declare a variable with an undefined value?
A). let x;
B). let x = '';
C). let x = 0;
D). let x = null;
What is the output of typeof null?
A). null
B). undefined
C). object
D). number
What is the result of null == undefined?
A). 1
B). 0
C). Error
D). NaN
What is the result of typeof undefined?
A). undefined
B). null
C). object
D). number