JS 1

var x = 5

• x is string

• X is number

• x is boolean

• no answer

typeof "hello"

• number
• array
• boolean
• string

5 + "5";

• 10
• 50
• 25
• 55

typeof(true);

• string
• number
• object
• boolean

Which of the following is not a primitive data type in JavaScript

• Symbol
• Array
• number

• Boolean

Which of the following variables allows redeclaration and reassignment in the same scope in JavaScript

• const
• function
• var

Which variable declaration enforces immutability in JavaScript

• const
• immutable
• var
• let

What will happen if you try to reassign a value to a variable declared with const keyword

• No effect on the variable value
• Variable value will be updated successfully
• Variable will be deleted
• Syntax error

Which variable declaration introduces block scoping in JavaScript

• let
• function
• var

What is the result of the following JavaScript expression: var x = 5; x++;

• 6
• 4
• 5
• 10