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 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
Which operator checks both value and type for equality in JavaScript?
A). ==
B). !=
C). ===
D). !==
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 will typeof NaN return?
A). number
B). NaN
C). undefined
D). object
What is the data type of 42 in JavaScript?
A). String
B). Boolean
C). Number
D). Object
What is the result of null === undefined?
A). 1
B). 0
C). Error
D). NaN
What is the output of typeof null?
A). null
B). undefined
C). object
D). number