What is the data type of the value NaN in JavaScript?
A). Number
B). String
C). Object
D). Undefined
What is a primitive value in JavaScript?
A). A complex data structure
B). A basic data type
C). A function
D). An array
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 is the data type of the value undefined in JavaScript?
A). String
B). Object
C). Undefined
D). Number
Which symbol is used to represent a boolean value in JavaScript?
A). #
B). $
C). !
D). true/false
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
Which of the following is a primitive data type in JavaScript?
A). Array
B). Object
C). Function
D). String
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 true + false in JavaScript?
A). true
B). false
C). 1
D). 0