Const Hoisting Mockest | JavaScript

1.

What is hoisting in JavaScript?

A). A process of lifting heavy objects B). Moving variable and function declarations to the top of their scope C). Reducing code size D). None of the above

Answer & Solution Discuss in Board

2.

Which keyword allows hoisting of variables in JavaScript?

A). var B). let C). const D). Both A and B

Answer & Solution Discuss in Board

3.

What happens if you access a var variable before its declaration in JavaScript?

A). ReferenceError B). TypeError C). undefined D). No error

Answer & Solution Discuss in Board

4.

What is the behavior of accessing a let variable before its declaration in JavaScript?

A). SyntaxError B). ReferenceError C). undefined D). No error

Answer & Solution Discuss in Board

5.

How does hoisting affect const declarations in JavaScript?

A). const variables are hoisted with their initial values B). const variables are hoisted but cannot be accessed before declaration C). const variables are hoisted and can be accessed before declaration D). Hoisting does not affect const declarations

Answer & Solution Discuss in Board

6.

What is the result of the following code snippet?

A). SyntaxError B). ReferenceError C). TypeError D). No error

Answer & Solution Discuss in Board

7.

How can you avoid issues related to hoisting and TDZ in JavaScript?

A). Always declare variables at the bottom of the code B). Use var for all variable declarations C). Declare variables with let or const and avoid accessing them early D). None of the above

Answer & Solution Discuss in Board

8.

What happens if you try to reassign a const variable in JavaScript?

A). No effect on the variable B). SyntaxError is thrown C). ReferenceError is thrown D). TypeError is thrown

Answer & Solution Discuss in Board

9.

Which of the following is true about const variables in JavaScript?

A). They can be reassigned after declaration B). They can be accessed before declaration C). They cannot be declared without an initial value D). They cannot be hoisted

Answer & Solution Discuss in Board

10.

How does hoisting affect function declarations in JavaScript?

A). Function declarations are hoisted with their function bodies B). Function declarations are hoisted but cannot be accessed before declaration C). Function declarations are not hoisted D). Hoisting has no effect on function declarations

Answer & Solution Discuss in Board

Const Hoisting Mocktest

Answer & Solution

Answer & Solution

Answer & Solution

Answer & Solution

Answer & Solution

Answer & Solution

Answer & Solution

Answer & Solution

Answer & Solution

Answer & Solution

COMPANY

Products

OTHERS

Partner