Answer & Solution
Answer: Option B
Solution:
The Undefined data type in JavaScript is used to represent the absence of a value, typically when a variable has been declared but not yet assigned a value.
Q
Which data type is used to represent the absence of a value in JavaScript?
Related Questions on Average
Which of the following is not a valid JavaScript variable name according to naming conventions?
A). myVariable
B). _myVariable
C). 2ndVariable
D). MyVariable
What is the data type of the value true in JavaScript?
A). Boolean
B). String
C). Number
D). Undefined
What will be the data type of the result when dividing a number by zero in JavaScript?
A). Infinity
B). NaN
C). Undefined
D). Null
What will be the output of typeof undefined in JavaScript?
A). String
B). Undefined
C). Null
D). Object
Which of the following is not a valid JavaScript data type?
A). Integer
B). Object
C). Symbol
D). NaN
What is the data type of the value Infinity in JavaScript?
A). Number
B). String
C). Boolean
D). Null
What will be the output of typeof NaN in JavaScript?
A). String
B). Number
C). NaN
D). Undefined
What will be the output of typeof {} in JavaScript?
A). Object
B). Null
C). Undefined
D). Boolean
What data type is used to represent a collection of key-value pairs in JavaScript?
A). Object
B). Array
C). Map
D). Set
Which data type is used to represent a list of elements in JavaScript?
A). List
B). Array
C). Tuple
D). Set