Blog

Question 1:  What is destructuring assignment in JavaScript?

(A) A way to join arrays

(B) A method to extract values from arrays or objects

(C) A tool to loop through data

Question 2:  What symbol is used to destructure an array in JavaScript?

(A) Curly braces

(B) Parentheses

(C) Square brackets

Question 3:  What symbol is used to destructure an object in JavaScript?

(A) Square brackets

(B) Curly braces

(C) Parentheses

Question 4:  Which of the following syntax is correct for destructuring an object?

(A) let {name} = person;

(B) let name = {person};

(C) let person = {name};

Question 5:  What will be the value of y after const {x, y} = {x: 5, y: 10}?

(A) 5

(B) 10

(C) undefined

Question 6:  What happens if you try to destructure a property that does not exist in the object?

(A) JavaScript throws an error

(B) The variable is undefined

(C) JavaScript creates a new property

Question 7:  Can you assign default values while destructuring?

(A) No

(B) Only with arrays

(C) Yes

Question 8:  What is the result of destructuring an empty array?

(A) An error occurs

(B) All variables get undefined

(C) Variables hold null

Question 9:  Which statement is true about nested destructuring?

(A) It works only with arrays

(B) It allows extracting values from nested structures

(C) It only works in loops

Question 10:  Is it possible to rename variables while destructuring an object?

(A) Yes by using colon syntax

(B) No

(C) Only in functions