Global Scope Mockest | JavaScript

1.

What is the global object in a browser environment?

A). window B). global C). document D). this

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2.

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

A). let B). var C). const D). function

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3.

How do you declare a global variable inside a function?

A). Using var B). Using let C). Using const D). Assigning to window

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4.

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

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5.

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

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6.

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

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7.

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

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8.

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

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9.

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

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10.

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

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Global Scope Mocktest

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