Blog

Question 1:  What is the default scope of a variable declared using var in JavaScript?

(A) Block Scope

(B) Function Scope

(C) Global Scope

Question 2:  Which keyword allows block-level scoping in JavaScript?

(A) var

(B) let

(C) function

Question 3:  What will be the output of the following code?

(A) 10

(B) undefined

(C) ReferenceError

Question 4:  Which keyword prevents a variable from being reassigned after its initial assignment?

(A) let

(B) var

(C) const

Question 5:  What happens when you try to access a let variable before its declaration?

(A) Returns undefined

(B) Throws a ReferenceError

(C) Assigns a default value

Question 6:  In JavaScript, hoisting applies to which of the following?

(A) Variables and functions

(B) Only functions

(C) Only variables

Question 7:  Which of the following is true about function declarations?

(A) They are hoisted with their definition

(B) They are not hoisted

(C) They are hoisted without their definition

Question 8:  What is the scope of a variable declared using const inside a function?

(A) Block Scope

(B) Function Scope

(C) Global Scope

Question 9:  What will be the output of the following code?

(A) 5

(B) undefined

(C) ReferenceError

Question 10:  Which of the following best describes hoisting in JavaScript?

(A) Variables and function declarations are moved to the top of their scope

(B) Variables and functions execute before they are declared

(C) JavaScript ignores undeclared variables