Answer & Solution
Answer: Option A
Solution:
Declaring a variable without assigning a value to it initializes it with undefined.
Q
How do you declare a variable with an undefined value?
Related Questions on Average
Which of the following is not a primitive data type in JavaScript?
A). String
B). Number
C). Object
D). Boolean
What is the result of typeof Symbol('id')?
A). symbol
B). object
C). string
D). undefined
What is the data type of true in JavaScript?
A). String
B). Boolean
C). Number
D). Object
Which operator checks both value and type for equality in JavaScript?
A). ==
B). !=
C). ===
D). !==
What is the result of null === undefined?
A). 1
B). 0
C). Error
D). NaN
What is the data type of an array in JavaScript?
A). Array
B). Object
C). Collection
D). List
What is the output of '5' + 3?
A). 8
B). 53
C). 8
D). Error
What is the output of '5' - 3?
A). 2
B). 2
C). 53
D). Error
What is the data type of 42 in JavaScript?
A). String
B). Boolean
C). Number
D). Object
What is the output of typeof null?
A). null
B). undefined
C). object
D). number