Answer & Solution
Answer: Option D
Solution:
In JavaScript, 0, '', null, undefined, NaN, and false are falsy values.
Q
Which of the following is a falsy value in JavaScript?
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What is the data type of 42 in JavaScript?
A). String
B). Boolean
C). Number
D). Object
What is the data type of true in JavaScript?
A). String
B). Boolean
C). Number
D). Object
What is the result of typeof Symbol('id')?
A). symbol
B). object
C). string
D). undefined
Which function can convert a number to a string in JavaScript?
A). toString()
B). parseInt()
C). String()
D). Number()
What will typeof NaN return?
A). number
B). NaN
C). undefined
D). object
Which symbol is used to denote a string template literal?
A). ''
B).
C). ``
D). {}
What is the result of typeof undefined?
A). undefined
B). null
C). object
D). number
What is the result of null == undefined?
A). 1
B). 0
C). Error
D). NaN
What is the output of '5' + 3?
A). 8
B). 53
C). 8
D). Error
What is the output of typeof null?
A). null
B). undefined
C). object
D). number