How can you avoid global scope pollution?

How do you declare a global variable inside a function?

A). Using var

B). Using let

C). Using const

D). Assigning to window

Which statement is true about global variables in JavaScript?

A). They are not accessible inside functions

B). They can be accessed and modified from any part of the code

C). They are constants

D). They can only be read, not modified

What is the global object in a browser environment?

A). window

B). global

C). document

D). this

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 is the output of console.log(globalThis === window); in a browser environment?

A). 1

B). 0

C). undefined

D). null

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

A). object

B). undefined

C). function

D). global

In Node.js, what is the global object called?

A). window

B). global

C). document

D). process

Which of the following can create a global variable?

A). var

B). let

C). const

D). All of the above

Can global variables lead to name collisions in large codebases?

A). Yes

B). No

C). Only if not managed properly

D). Only in strict mode

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