Q991. What is an object literal in JavaScript?
Object literal is a syntax for creating object in javascript in which property and method are inside of curly braces separated by comma. We assign a variable to an object...
Technical Question Bank · Peer-Reviewed
Job Interview Questions and Answers Directory
Search and filter frequently asked interview questions across technical, programming, and behavioral domains. Tailor your interview preparation by difficulty for freshers or experienced developers (1,100 available).
Active:
Tag: javascript ×
Q992. How would you clone an object in JavaScript?
There are four ways to clone an object in javascript. They are: 1. Use the spread operator. 2. Call the Object.assign() function. 3. Use JSON parsing. 4. Use the structur...
Q993. What is a JSON?
JavaScript Object Notation (JSON) is a standard text-based format for representing structured data based on JavaScript object syntax. It is commonly used for transmitting...
Q994. What is Class in JavaScript?
Class is a template that can be used to create objects that share the same properties and methods. When an object is created from a class, it is called an instance of tha...
Q995. What is the difference between a static method and an instance method in a class?
An instance method is a method that can be called on an instance of a class, and it can access and modify instance-specific data, like properties of the object. A static ...
Q996. What is "this" in JavaScript Classes?
In JavaScript classes, `this` refers to the current object that is being worked on. It's like a placeholder for the object. For example, if you have a class that creates ...
Q997. Can you explain the concept of method overriding in a class in JavaScript?
Method overriding is a concept in JavaScript where a subclass can provide its own implementation of a method that is already defined in the parent class. To override a me...
Q998. What is composition in classes in JavaScript?
Composition in class JS is a technique of building complex classes by combining smaller, more focused classes that represent specific behaviors or properties.Composition ...
Q999. What is inheritance in classes in JavaScript?
Inheritance in classes in JavaScript is the ability to create a new class based on an existing class. The new class inherits all the properties and methods of the existin...
Q1000. What is the `extends` keyword in JavaScript, and how is it used for inheritance?
The `extends` keyword is used in JavaScript to create a new class that inherits from an existing class. It is used in the class declaration syntax, like this: ``` class C...