Which operator is used for string concatenation in JavaScript?

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 is the value of the expression null == undefined?

A). 1

B). 0

C). null

D). undefined

What is the output of 10 > 5 && 5 < 2?

A). 1

B). 0

C). 1

D). 0

Which operator is used to assign a value to a variable in JavaScript?

A). =

B). ==

C). ===

D). =>

Which of the following is not a comparison operator?

A). ==

B). >

C). <=

D). =

Which operator checks if two values are not equal and also checks for type?

A). !=

B). !==

C). <

D). >

What is the result of the expression 5 + '5'?

A). 10

B). 55

C). 55

D). NaN

What is the result of true + false?

A). 0

B). 1

C). truefalse

D). NaN

What does typeof NaN return?

A). number

B). NaN

C). undefined

D). object