Function Scope Mockest | JavaScript

11.

What is the output of console.log(outerVar); outside of outerFunction if var outerVar = 'Outer'; is defined inside outerFunction?

A). Outer B). undefined C). Error D). null

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12.

What is hoisting in JavaScript?

A). Moving variables to the top of their function or global scope B). Making variables undefined C). Creating new variables D). None of the above

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13.

What is block scope in JavaScript?

A). Variables scoped to a block B). Variables scoped to a function C). Variables scoped globally D). Variables scoped locally

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14.

How do you declare a block-scoped variable in ES6?

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

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15.

What happens if you declare a variable with the same name in both function and block scopes?

A). It creates two separate variables B). It causes an error C). It combines the scopes D). It prioritizes the function scope

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16.

What is the output of console.log(blockVar); outside of a block if let blockVar = 'Block'; is defined inside a block?

A). Block B). undefined C). Error D). null

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17.

How can you access a variable declared in an inner block from an outer block?

A). Using the var keyword B). Using the let keyword C). Using the const keyword D). Using the this keyword

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18.

What is the benefit of block scope in JavaScript?

A). It reduces variable conflicts B). It increases global scope C). It simplifies variable declarations D). It makes variables inaccessible

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19.

What is the difference between let and var in terms of function scope?

A). let is block-scoped, var is function-scoped B). let is function-scoped, var is block-scoped C). They are both block-scoped D). They are both function-scoped

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20.

How does lexical scoping affect nested functions in JavaScript?

A). Nested functions inherit variables from their outer functions B). Nested functions have their own separate variables C). Nested functions cannot access outer function variables D). Nested functions create global variables

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Function Scope Mocktest

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