Can global variables lead to name collisions in large codebases?

What is the global object in a browser environment?

A). window

B). global

C). document

D). this

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 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

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

A). let

B). var

C). const

D). function

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 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 purpose of the global object in JavaScript?

A). To store local variables

B). To provide a namespace for global variables and functions

C). To define constants

D). To execute code in strict mode

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

A). var

B). global

C). let

D). window