Q
What is the purpose of the 'constructor' method in a JavaScript class?

Answer & Solution

Answer: Option B
Solution:
The 'constructor' method in a JavaScript class is used to initialize the class properties when new instances of the class are created. It is automatically called when you create a new object from the class. Therefore, option B, 'To initialize class properties', is correct for explaining the purpose of the 'constructor' method in a JavaScript class.
Related Questions on Average

Which operator is used for strict inequality in JavaScript?

A). !==

B). !=

C). <>

D). /=

How can you convert a string to a number in JavaScript?

A). parseInt('10')

B). parseFloat('10.5')

C). Number('10')

D). All of the above

What is the correct way to declare a variable in JavaScript?

A). var x = 10;

B). let x = 10;

C). const x = 10;

D). variable x = 10;

What is the purpose of the 'typeof' operator in JavaScript?

A). To check if a variable is defined

B). To check the data type of a variable

C). To assign a data type to a variable

D). To increment the value of a variable

What is the correct way to declare a JavaScript class?

A). class Rectangle {}

B). let Rectangle = {}

C). function Rectangle() {}

D). Rectangle {}

What is the purpose of the 'return' statement in a JavaScript function?

A). To end the function execution

B). To return a value from the function

C). To print a value to the console

D). To declare a variable

How do you concatenate strings in JavaScript?

A). Using the + operator

B). Using the - operator

C). Using the * operator

D). Using the / operator

Which statement correctly declares a JavaScript module?

A). export function myFunc() {}

B). const myModule = function() {}

C). module.exports = myModule;

D). import myModule from './myModule.js';

What is the purpose of the 'this' keyword in JavaScript?

A). To refer to the current HTML element

B). To refer to the current JavaScript file

C). To refer to the current object

D). To refer to the current function

How can you prevent a JavaScript function from executing immediately?

A). Using async/await

B). Using the defer attribute in HTML script tag

C). Wrapping the function in parentheses

D). Using the setTimeout function