Which operator is used for string concatenation in JavaScript?
A). -
B). *
C). +
D). /
Which of the following is a logical operator in JavaScript?
A). &&
B). ||
C). !
D). All of the above
What is the result of '5' - 2?
A). 3
B). 3
C). 03-May
D). NaN
What does typeof NaN return?
A). number
B). NaN
C). undefined
D). object
Which operator is used to assign a value to a variable in JavaScript?
A). =
B). ==
C). ===
D). =>
Which of the following operators can be used to compare two values, including type comparison?
A). ==
B). =
C). ===
D). !==
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 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
What does the !! operator do to a value?
A). Negates the value
B). Converts the value to its boolean equivalent
C). Increments the value by 2
D). No effect