What is the data type of the value undefined in JavaScript?
A). Number
B). Boolean
C). String
D). Undefined
What is the result of 0 / 0 in JavaScript?
A). Infinity
B). 0
C). NaN
D). 1
What will let x = null; console.log(typeof x); output in JavaScript?
A). Object
B). Null
C). Undefined
D). Number
Which of these is a complex or reference data type in JavaScript?
A). Number
B). Boolean
C). Object
D). String
Which data type represents a block of reusable code in JavaScript?
A). String
B). Object
C). Function
D). Number
Which of the following is a primitive data type in JavaScript?
A). Object
B). Array
C). Function
D). Boolean
What is the data type of the value true in JavaScript?
A). Number
B). String
C). Boolean
D). Undefined
What is the data type of the value 42 in JavaScript?
A). String
B). Boolean
C). Number
D). Null
Which operator checks if an object is an instance of a specific object type in JavaScript?
A). instanceof
B). typeof
C). isInstanceof
D). isTypeOf
Which data type represents an intentional absence of any value in JavaScript?
A). Null
B). Undefined
C). String
D). Number