Skip to main content

javascript interview questions and answers


  1. This is first example of java script(answer..) 
  2. Get the url of the parent page using java script(answer..) 
  3. Remove href-link at the run time from a any page using java script(answer..) 
  4. How to show the prompt-box using java script (answer..) 
  5. How to find the special characters using java script(answer..) 
  6. Show day-of-week using java script(answer..) 
  7. How to show the confirm-box using java script(answer..) 
  8. Validate a form using java script(answer..) 
  9. What is the use of eval() method and floor() method in java script(answer..) 
  10. What is the use of join() and isNAN() method in java script(answer..) 
  11. Can you tell me about methods in java script(answer..) 
  12. How to use a loop in java script(answer..) 
  13. What is the continue and break statement in java script(answer..) 
  14. Explain the java script Math(), String, Number object method(answer..) 
  15. What is the use of createTextNode() method in java script(answer..) 
  16. What is the use of blure() and assign() method(answer..) 
  17. What is the use of link() in java script(answer..) 
  18. What is the use of createPopup() and open() method(answer..) 
  19. What is the use of blink() method(answer..) 
  20. What is the use of print() method(answer..) 
  21. How to send an email using java script(answer..) 
  22. What is the unit user time on a page(answer..) 
  23. How to show the digital-clock in the status line using java script(answer..) 
  24. What is the use of sup() and sort() method(answer..) 
  25. Example of calculator in java script(answer..) 
  26. How to upload an image using java script (answer..) 
  27. How to display clock on button(answer..) 
  28. How to show the popup window onmousover(answer..) 
  29. How to use the cookie in java script (answer..) 
  30. How to increase or decrease the image size(answer..) 
  31. How to open a popup in the java script(answer..) 
  32. How to generate the Uni-Code(answer..) 
  33. How to disable the mouse right click(answer..) 
  34. How to create animated frame using java script(answer..) 
  35. What is the use of pow() in java script(answer..)
  36. What is the use of slice() in java script(answer..)


By Anil Singh | Rating of this article (*****)

Popular posts from this blog

nullinjectorerror no provider for httpclient angular 17

In Angular 17 where the standalone true option is set by default, the app.config.ts file is generated in src/app/ and provideHttpClient(). We can be added to the list of providers in app.config.ts Step 1:   To provide HttpClient in a standalone app we could do this in the app.config.ts file, app.config.ts: import { ApplicationConfig } from '@angular/core'; import { provideRouter } from '@angular/router'; import { routes } from './app.routes'; import { provideClientHydration } from '@angular/platform-browser'; //This (provideHttpClient) will help us to resolve the issue  import {provideHttpClient} from '@angular/common/http'; export const appConfig: ApplicationConfig = {   providers: [ provideRouter(routes),  provideClientHydration(), provideHttpClient ()      ] }; The appConfig const is used in the main.ts file, see the code, main.ts : import { bootstrapApplication } from '@angular/platform-browser'; import { appConfig } from ...

25 Best Vue.js 2 Interview Questions and Answers

What Is Vue.js? The Vue.js is a progressive JavaScript framework and used to building the interactive user interfaces and also it’s focused on the view layer only (front end). The Vue.js is easy to integrate with other libraries and others existing projects. Vue.js is very popular for Single Page Applications developments. The Vue.js is lighter, smaller in size and so faster. It also supports the MVVM ( Model-View-ViewModel ) pattern. The Vue.js is supporting to multiple Components and libraries like - ü   Tables and data grids ü   Notifications ü   Loader ü   Calendar ü   Display time, date and age ü   Progress Bar ü   Tooltip ü   Overlay ü   Icons ü   Menu ü   Charts ü   Map ü   Pdf viewer ü   And so on The Vue.js was developed by “ Evan You ”, an Ex Google software engineer. The latest version is Vue.js 2. The Vue.js 2 is very similar to Angular because Evan ...

Top 15+ Angular 17 Interview Questions Answers | For Experienced Professionals as well

G Google team released the latest version of Angular – Angular 17 on November 6, 2023, creating a significant milestone for the super fast front-end development. What Are the New Features in Angular 17? 1.       Angular 17 is the highly anticipated release for the community, bringing many new exciting features, updates, and improvements. 2.       New Syntax for Control Flow in Templates - new @if, @switch, @for, @case, @empty @end control flow syntax 3.       Deferred Loading - @defer partial template 4.       The Angular signals API 5.       Angular SSR and client hydration 6.       Automatic Migration to Build-in Control Flow 7.       Build Performance with ESBuild 8.       By default, set this newly generated component as a standalone, and now we don't have an app module file. To use (ng...

How To Optimizing Database Performance: Tips and Techniques for Developers

Best Practices for Optimizing Database Performance: Tips and Techniques for Developers Navigating the labyrinth of database performance optimization can often seem like a daunting task for many professionals. Especially for database developers, mastering this critical skill has immense value, as it enhances both the efficiency and responsiveness of their applications.  Effective database performance optimization leads to faster data retrieval and smoother transactions.  A key challenge, however, lies in knowing  how to hire database developers who are well-versed in optimization techniques. The market is flooded with many professionals, but finding the right expert who understands the intricacies of database performance can be like looking for a needle in a haystack. Employers need to seek those who are not only proficient in their craft but also updated with the latest optimization practices. This guide, therefore, not only aims to provide developers with a compre...

39 Best Object Oriented JavaScript Interview Questions and Answers

Most Popular 37 Key Questions for JavaScript Interviews. What is Object in JavaScript? What is the Prototype object in JavaScript and how it is used? What is "this"? What is its value? Explain why "self" is needed instead of "this". What is a Closure and why are they so useful to us? Explain how to write class methods vs. instance methods. Can you explain the difference between == and ===? Can you explain the difference between call and apply? Explain why Asynchronous code is important in JavaScript? Can you please tell me a story about JavaScript performance problems? Tell me your JavaScript Naming Convention? How do you define a class and its constructor? What is Hoisted in JavaScript? What is function overloadin...