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

What is the global object in a browser environment?

A). window

B). global

C). document

D). this

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

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

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

Which keyword is used to declare a variable in the global scope?

A). let

B). var

C). const

D). function

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

A). var

B). global

C). let

D). window

How do you declare a global variable inside a function?

A). Using var

B). Using let

C). Using const

D). Assigning to window

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

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

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

A). Encapsulation

B). Namespace

C). Strict mode

D). Block scoping