Answer & Solution
Answer: Option A
Solution:
The typeof undefined returns 'undefined' in JavaScript.
Q
What is the outcome of typeof undefined in JavaScript?
Related Questions on Average
Which data type represents an intentional absence of any value in JavaScript?
A). Null
B). Undefined
C). String
D). Number
What will let x = '10'; let y = x - 5; console.log(y); output in JavaScript?
A). '5'
B). 5
C). '10'
D). 10
What is the outcome of typeof [1, 2, 3] in JavaScript?
A). String
B). Number
C). Array
D). Object
What is the data type of the value 'null' (with quotes) in JavaScript?
A). String
B). Number
C). Null
D). Undefined
What is the data type of the value 42 in JavaScript?
A). String
B). Boolean
C). Number
D). Null
Which data type represents positive infinity in JavaScript?
A). Infinity
B). Number
C). NaN
D). Null
What does NaN represent in JavaScript?
A). Not a Number
B). Infinity
C). Positive Infinity
D). Negative Infinity
Which of these is a complex or reference data type in JavaScript?
A). Number
B). Boolean
C). Object
D). String
Which of the following is a primitive data type in JavaScript?
A). Object
B). Array
C). Function
D). Boolean
What is the result of 0 / 0 in JavaScript?
A). Infinity
B). 0
C). NaN
D). 1