Can a global variable be accessed inside a function?

What happens if you declare a variable without var, let, or const inside a function?

A). It becomes a global variable

B). It becomes a local variable

C). It throws an error

D). It becomes a constant

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

A). object

B). undefined

C). function

D). global

Which of the following can create a global variable?

A). var

B). let

C). const

D). All of the above

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

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

A). window

B). global

C). document

D). process

How can you access a global variable inside a function if it has the same name as a local variable?

A). By using the window object

B). By using the global object

C). By using a different name for the global variable

D). By using the this keyword

How can you avoid global scope pollution?

A). By using local variables

B). By using IIFE (Immediately Invoked Function Expressions)

C). By using modules

D). All of the above

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

A). 1

B). 0

C). undefined

D). null

Which of the following can be used to prevent accidental modification of global variables?

A). Encapsulation

B). Namespace

C). Strict mode

D). Block scoping

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