Technical Question Bank · Peer-Reviewed
Search and filter frequently asked interview questions across technical, programming, and behavioral domains. Tailor your interview preparation by difficulty for freshers or experienced developers (2,728 available).
To prevent the default behavior of an event in the DOM using JavaScript, you can use the preventDefault() method. This method is called on the event object that is passed...
Event propagation in the DOM refers to how events move or flow through different elements on a webpage. When an event happens on an element, like a click, it can travel t...
The call stack in JavaScript is a data structure that stores information about the currently executing functions. When a function is called, a new frame is added to the t...
The event loop in JavaScript handles asynchronous operations by queuing them up and processing them one by one in a non-blocking way. It checks the event queue continuous...
`setTimeout()` is a built-in function in JavaScript that allows you to schedule a function to be executed after a specified amount of time has elapsed.
`setInterval()` is a function in JavaScript that allows you to repeatedly execute a given function at a specified interval. It works by calling the function repeatedly wi...
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...
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 ...
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...
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...
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