JavaScript Data Types Quiz

Which JavaScript data type is used to represent any number, including those with decimals?

• string

• bigint

• number

• boolean

What is the JavaScript data type used to represent a grouping of characters?

• symbol

• string

• bigint

• undefined

Which data type in JavaScript is used to represent the intentional absence of a value?

• null

• undefined

• boolean

• number

In JavaScript, what does the 'boolean' data type represent?

• A sequence of characters

• Any number

• Either true or false

• The absence of a value

What is the correct way to test the null type in JavaScript?

• typeof null === 'object'

• typeof null === 'null'

• null === null

• === null

Why is BigInt used in JavaScript?

• To handle very small numbers

• To handle decimal numbers

• To handle very large numbers

• To handle text data

Which of the following is a correct declaration of a string in JavaScript?

• let greeting = 'Hi buddy';

• let greeting = Hi buddy;

• let greeting = "Hi buddy"

• let greeting = `Hi buddy`

What will be the output of console.log(9999999999999999); in JavaScript?

• 9999999999999999

• 10000000000000000

• 9999999999999998

• Error

Which of the following values is considered false in JavaScript?

• 'false'

• '0'

• false

• null

What does 'undefined' signify in JavaScript?

• A variable that has not been assigned a value

• A variable that is not declared in the program

• A syntax error in the code

• A function without a return value