Answer & Solution
Answer: Option A
Solution:
The undefined value in JavaScript represents the absence of a value or a variable that has not been initialize
Q
Which primitive value represents absence of value or no value assigned?
Related Questions on Average
What is the data type of the value NaN in JavaScript?
A). Number
B). String
C). Object
D). Undefined
What is the result of the expression true == 1 in JavaScript?
A). true
B). false
C). Error
D). 1
Which of the following is a valid way to represent the value null in JavaScript?
A). undefined
B). NULL
C). null
D). None of the above
What is the result of the expression undefined + null in JavaScript?
A). undefined
B). null
C). 0
D). Error
What does the Symbol data type represent in JavaScript?
A). A unique identifier
B). A number
C). A boolean value
D). An object
What is the result of the expression true + false in JavaScript?
A). true
B). false
C). 1
D). 0
What is the data type of the value undefined in JavaScript?
A). String
B). Object
C). Undefined
D). Number
Which of the following statements about primitive values in JavaScript is true?
A). They are mutable
B). They are passed by reference
C). They are stored on the heap
D). They are immutable
What is the default value of a variable in JavaScript if it is not initialized?
A). null
B). undefined
C). 0
D). 'undefined'
What happens when you add two numbers using the + operator in JavaScript?
A). The numbers are concatenated
B). The numbers are multiplied
C). The numbers are added
D). An error occurs