What does the + operator do when used with two numbers?
A). Concatenates them as strings
B). Adds them
C). Multiplies them
D). Subtracts them
Which of the following is a logical operator in JavaScript?
A). &&
B). ||
C). !
D). All of the above
What is the result of the expression 5 + '5'?
A). 10
B). 55
C). 55
D). NaN
What does typeof NaN return?
A). number
B). NaN
C). undefined
D). object
Which of the following is not a comparison operator?
A). ==
B). >
C). <=
D). =
Which operator is used to assign a value to a variable in JavaScript?
A). =
B). ==
C). ===
D). =>
What is the result of 10 % 3 in JavaScript?
A). 0
B). 1
C). 2
D). 3
What is the value of the expression null == undefined?
A). 1
B). 0
C). null
D). undefined
What is the result of 5 === '5'?
A). 1
B). 0
C). 1
D). 0
What is the result of true + false?
A). 0
B). 1
C). truefalse
D). NaN