What does typeof NaN return?
A). number
B). NaN
C). undefined
D). object
Which of the following is a logical operator in JavaScript?
A). &&
B). ||
C). !
D). All of the above
Which operator is used for string concatenation in JavaScript?
A). -
B). *
C). +
D). /
What is the result of 5 === '5'?
A). 1
B). 0
C). 1
D). 0
What does the + operator do when used with two numbers?
A). Concatenates them as strings
B). Adds them
C). Multiplies them
D). Subtracts them
What is the result of '5' - 2?
A). 3
B). 3
C). 03-May
D). NaN
What does the typeof operator return for an array?
A). object
B). array
C). list
D). collection
What is the result of the expression 5 + '5'?
A). 10
B). 55
C). 55
D). NaN
Which operator checks if two values are not equal and also checks for type?
A). !=
B). !==
C). <
D). >
What is the value of the expression null == undefined?
A). 1
B). 0
C). null
D). undefined