What is the purpose of the global object in JavaScript?

Which of the following methods can help in avoiding global variables?

A). Using functions to encapsulate code

B). Using objects to namespace code

C). Using ES6 modules

D). All of the above

What is the global object in a browser environment?

A). window

B). global

C). document

D). this

Can a global variable be accessed inside a function?

A). Yes

B). No

C). Only if passed as a parameter

D). Only if defined with var

What is the output of typeof window in a browser environment?

A). object

B). undefined

C). function

D). global

What is the output of console.log(globalVar); if globalVar = 'Hello'; is assigned inside a function without using var, let, or const?

A). Hello

B). undefined

C). error

D). null

What is the output of console.log(window.globalLet); if let globalLet = 'Hello'; is declared in the global scope?

A). Hello

B). undefined

C). error

D). null

How do you declare a global variable inside a function?

A). Using var

B). Using let

C). Using const

D). Assigning to window

What will be the output of console.log(window.myVar); if var myVar = 'Hello'; is declared outside any function?

A). Hello

B). undefined

C). error

D). null

What happens if you declare a variable inside a function with the same name as a global variable?

A). It creates a new local variable

B). It throws an error

C). It modifies the global variable

D). It assigns the global variable to null

What keyword is used to ensure a variable is block-scoped?

A). var

B). global

C). let

D). window