What is the data type of true in JavaScript?
A). String
B). Boolean
C). Number
D). Object
Which function can convert a number to a string in JavaScript?
A). toString()
B). parseInt()
C). String()
D). Number()
What is the data type of an array in JavaScript?
A). Array
B). Object
C). Collection
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 42 in JavaScript?
A). String
B). Boolean
C). Number
D). Object
What is the output of '5' + 3?
A). 8
B). 53
C). 8
D). Error
What is the result of typeof undefined?
A). undefined
B). null
C). object
D). number
What is the result of null == undefined?
A). 1
B). 0
C). Error
D). NaN
Which operator checks both value and type for equality in JavaScript?
A). ==
B). !=
C). ===
D). !==