What is the data type of the value 42 in JavaScript?
A). String
B). Boolean
C). Number
D). Null
What will be the result of typeof 'hello' in JavaScript?
A). String
B). Number
C). Undefined
D). Function
What is the data type of the value undefined in JavaScript?
A). Number
B). Boolean
C). String
D). Undefined
What will the following code snippet output: let a = 10; a += '5'; console.log(a); in JavaScript?
A). '105'
B). 105
C). 15
D). '15'
Which data type represents positive infinity in JavaScript?
A). Infinity
B). Number
C). NaN
D). Null
What will let x = null; console.log(typeof x); output in JavaScript?
A). Object
B). Null
C). Undefined
D). Number
What does NaN represent in JavaScript?
A). Not a Number
B). Infinity
C). Positive Infinity
D). Negative Infinity
What is the result of 0 / 0 in JavaScript?
A). Infinity
B). 0
C). NaN
D). 1
What is the outcome of typeof undefined in JavaScript?
A). String
B). Undefined
C). Null
D). Number
What is the data type of the value true in JavaScript?
A). Number
B). String
C). Boolean
D). Undefined