Q61. What is the role of the Window object in the DOM?
The Window object in the DOM represents the browser window or tab that displays the web page. It provides methods and properties for controlling and manipulating the brow...
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 (79 available).
Active:
Tag: objects ×
Q62. What is a JavaScript object?
JavaScript object is a non-primitive data-type that allows you to store multiple collections of data. It is a container of key-value pairs in which value may be a variabl...
Q63. What is the difference between dot notation and bracket notation when accessing properties of an object?
Dot Notation only allows static keys while Bracket Notation accepts dynamic keys. Static key here means that the key is typed directly, while Dynamic key here means that ...
Q64. 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...
Q65. 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...
Q66. How would you convert an object to a JSON string in JavaScript, and vice versa?
In JavaScript, you can convert an object to a JSON string using the `JSON.stringify()` method, and you can convert a JSON string back to an object using the `JSON.parse()...
Q67. What is the difference between an object's prototype and its constructor function?
| Prototype | Constructor Function | | --------------------------------------------------------------------------------- | -----------------------------------------------...
Q68. How do you add properties and methods to an object's prototype in JavaScript?
We can add properties and methods to an object's prototype by using the constructor function's prototype property. To add a property, simply assign a value to a property ...
Q69. What is the difference between `Object.prototype` and `Object.__proto__` in JavaScript?
In other words, `Object.prototype` is the object that provides default properties and methods that all objects in JavaScript inherit from. On the other hand, `Object.__pr...
Q70. How do you check if an object inherits from a specific prototype in JavaScript?
We can check if an object inherits from a specific prototype by using the `isPrototypeOf()` method. This method can be called on a prototype object to check if it appears...