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