Answer & Solution
Answer: Option C
Solution:
The null keyword is used to represent a null value in JavaScript.
Q
Which of the following is a valid way to represent the value null in JavaScript?
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What is the result of the expression true == 1 in JavaScript?
A). true
B). false
C). Error
D). 1
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 happens when you try to access a variable that has not been declared in JavaScript?
A). SyntaxError is thrown
B). ReferenceError is thrown
C). TypeError is thrown
D). Undefined
What is the data type of the value NaN in JavaScript?
A). Number
B). String
C). Object
D). Undefined
Which primitive value represents absence of value or no value assigned?
A). undefined
B). null
C). 0
D). 'undefined'
What is the default value of a variable in JavaScript if it is not initialized?
A). null
B). undefined
C). 0
D). 'undefined'
What is the result of the expression 5 + '5' in JavaScript?
A). 10
B). '55'
C). '10'
D). Error
What is the result of the expression undefined + null in JavaScript?
A). undefined
B). null
C). 0
D). Error
What is the result of the expression true + false in JavaScript?
A). true
B). false
C). 1
D). 0
Which of the following is a primitive data type in JavaScript?
A). Array
B). Object
C). Function
D). String