Which of the following statements is true about primitive data types in JavaScript?

Which of the following is not a primitive value in JavaScript?

A). Number

B). Boolean

C). Object

D). String

Which primitive value represents absence of value or no value assigned?

A). undefined

B). null

C). 0

D). 'undefined'

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 result of the expression true + false in JavaScript?

A). true

B). false

C). 1

D). 0

What is the data type of the value NaN in JavaScript?

A). Number

B). String

C). Object

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'

Which of the following is a valid JavaScript symbol?

A). symbol

B). &symbol

C). #symbol

D). Symbol('description')

Which of the following statements is true about JavaScript's null value?

A). It represents an empty string

B). It represents a non-existent value

C). It represents a boolean value

D). It represents a number

What is the result of the expression true == 1 in JavaScript?

A). true

B). false

C). Error

D). 1

What is the result of the expression 5 + '5' in JavaScript?

A). 10

B). '55'

C). '10'

D). Error