Answer & Solution
Answer: Option D
Solution:
The value undefined is of type undefined in JavaScript.
Q
What is the data type of the value undefined in JavaScript?
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What is the data type of the value true in JavaScript?
A). Number
B). String
C). Boolean
D). Undefined
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A). String
B). Number
C). Null
D). Undefined
Which of these is a complex or reference data type in JavaScript?
A). Number
B). Boolean
C). Object
D). String
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A). Object
B). Null
C). Undefined
D). Number
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'
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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
Which data type represents unique and immutable values in JavaScript introduced in ES6?
A). Symbol
B). Object
C). Array
D). Function
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A). Null
B). Undefined
C). String
D). Number
What is the data type of the value 42 in JavaScript?
A). String
B). Boolean
C). Number
D). Null