Answer & Solution
Answer: Option A
Solution:
NaN stands for 'Not a Number' and represents an invalid or unrepresentable value resulting from arithmetic operations.
Q
What does NaN represent in JavaScript?
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Which data type represents positive infinity in JavaScript?
A). Infinity
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D). Null
Which of the following is not a valid data type in JavaScript?
A). Array
B). Symbol
C). Map
D). Tuple
Which of the following is a primitive data type in JavaScript?
A). Object
B). Array
C). Function
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A). Null
B). Undefined
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D). Number
What is the data type of the value 'null' (with quotes) in JavaScript?
A). String
B). Number
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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 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 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 unique and immutable values in JavaScript introduced in ES6?
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B). Object
C). Array
D). Function