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HackerKernel Front end Developer Interview Questions and Answers
HackerKernel Front end Developer Interview Experiences
1 interview found
Anonymous
Selected
I applied via Recruitment Consulltant and was interviewed before Jan 2024. There was 1 interview round.
(2 Questions)
- Q1. What is angular
- Ans.
Angular is a popular front-end framework for building dynamic web applications.
Angular is developed and maintained by Google.
It uses TypeScript for building applications.
Angular provides features like two-way data binding, dependency injection, and routing.
Components, services, and modules are key building blocks in Angular.
Angular CLI is a command-line tool for creating and managing Angular projects.
- Q2. Difference between package.json and angular.json
- Ans.
package.json is for managing dependencies and scripts for a project, while angular.json is specific to Angular projects for configuring build and project settings.
package.json is used for managing dependencies, scripts, and metadata for a project
angular.json is specific to Angular projects and is used for configuring build options, project settings, and other Angular-specific configurations
package.json is typically loc...
Skills evaluated in this interview
Interview questions from similar companies
I was interviewed before Dec 2020.
(1 Question)
Round duration - 360 minutes
Round difficulty - Medium
Basically TCS conduct its flagship event named as CODEVITA . And it offers Internship to prefinal (3rd )year students .
- Q1.
Allocate Books Problem Statement
Given an array of integers
arr, wherearr[i]represents the number of pages in thei-thbook, and an integermrepresenting the number of students, allocate all the books ... - Ans.
Allocate books to students in a way that minimizes the maximum number of pages assigned to a student.
Iterate through possible allocations and calculate the maximum pages assigned to a student.
Find the minimum of these maximums to get the optimal allocation.
Return the minimum pages allocated in each test case, or -1 if not possible.
Interview Preparation Tips
Tip 1 : Good understanding of Data Structure and Algorithms
Tip 2 : Be clear in your Core Subjects.
Tip 3 : Do at least 1 good Project .
Tip 4 : Be humble and speak truth .
Tip 1 : Simple and Crisp .
Tip 2 : Do host your project and mention the link in the resume .
Tip 3 : Single Page
Skills evaluated in this interview
I applied via Approached by Company and was interviewed in May 2024. There was 1 interview round.
(1 Question)
- Q1. Java script bubbling concept
Us Together
Selected
I applied via LinkedIn and was interviewed in Dec 2024. There were 4 interview rounds.
QUANT, MATHS, HTML, CSS
DSA WAS ASKED TOGETHER WITH SOME CORE SUBJECT QUESTIONS.
DSA WAS ASKED TOGETHER WITH SOME PUZZLES.
(2 Questions)
- Q1. BASIC COMMON HR QUES
- Q2. BASIC COMMON HR QUES
Interview Preparation Tips
- HTML
- SQL
- React.Js
- Node.Js
- CSS
(1 Question)
- Q1. ES6 concepts, React js over all concepts
(1 Question)
- Q1. ES6 concepts, coding
(1 Question)
- Q1. Challenges, about current project
(1 Question)
- Q1. General questions and joining formalities
Interview Preparation Tips
I applied via Naukri.com and was interviewed in Sep 2024. There was 1 interview round.
(1 Question)
- Q1. Javascript question
I applied via Naukri.com and was interviewed in Oct 2023. There were 2 interview rounds.
Hacker Rank Online Written Test
Topics covered DSA and Javascript
Interview Preparation Tips
- DSA
- Javascript
- Reactjs
I applied via Recruitment Consulltant and was interviewed in Mar 2024. There was 1 interview round.
(5 Questions)
- Q1. Display a list of items using Pagination concept in React using any online coding editor.
- Ans.
Display a list of items using Pagination concept in React
Create a list of items to display
Implement pagination logic to display a limited number of items per page
Add navigation buttons to switch between pages
- Q2. Check if pair sum exists in the array (Two Sum)?
- Ans.
Check if pair sum exists in the array using a hash map.
Use a hash map to store the difference between the target sum and each element in the array.
Iterate through the array and check if the current element exists in the hash map.
Return true if a pair sum exists, otherwise return false.
- Q3. React LifeCycle?
- Q4. How do you improve the performance of a website?
- Ans.
Improving website performance involves optimizing code, reducing server requests, using caching, and optimizing images.
Optimize code by minifying CSS, JavaScript, and HTML
Reduce server requests by combining files and using asynchronous loading
Utilize caching techniques like browser caching and server-side caching
Optimize images by resizing, compressing, and using modern image formats like WebP
- Q5. What is NextJS?
- Ans.
NextJS is a React framework that allows for server-side rendering and static site generation.
NextJS is built on top of React, providing features like server-side rendering and static site generation.
It simplifies the process of building React applications by handling routing, code splitting, and more out of the box.
NextJS also supports API routes for serverless functions and data fetching.
It offers features like automa...
Skills evaluated in this interview
Ishan Gupta
I applied via Approached by Company and was interviewed in Feb 2022. There was 1 interview round.
(1 Question)
- Q1. Basics of react and JavaScript
Interview Preparation Tips
I applied via LinkedIn
Interview Questionnaire
5 Questions
- Q1. 1.what is strict Mode in react. 2.Virtual Dom. 3,react and html difference
- Q2. What is redux
- Ans.
Redux is a predictable state container for JavaScript apps.
Redux is a library for managing application state
It provides a centralized store for all the state of an application
It uses a single source of truth principle
It allows for predictable state changes through actions and reducers
It is commonly used with React for building complex UIs
- Q3. What is jquery? 2.explain architecture of your project.
- Ans.
jQuery is a fast, small, and feature-rich JavaScript library.
jQuery simplifies HTML document traversing, event handling, and animating.
It provides a set of methods for AJAX interactions and DOM manipulation.
jQuery is cross-platform and supports a wide range of browsers.
It has a large community and a vast number of plugins available.
Project architecture depends on the specific project and its requirements.
- Q4. Form validation in react
- Ans.
Form validation in React ensures user input is correct before submission.
Use controlled components to manage form state
Create validation functions to check input
Display error messages for invalid input
Disable submit button until form is valid
Consider using a library like Formik or Yup for easier validation
- Q5. React hooks explanation
- Ans.
React hooks are functions that allow functional components to use state and lifecycle methods.
Hooks were introduced in React 16.8
useState() is a hook that allows state to be used in functional components
useEffect() is a hook that allows lifecycle methods to be used in functional components
Custom hooks can be created to reuse stateful logic across components
Interview Preparation Tips
Skills evaluated in this interview
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