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HackerRank React Js Frontend Developer Interview Questions and Answers

Updated 29 Nov 2024

HackerRank React Js Frontend Developer Interview Experiences

1 interview found

Interview experience
3
Average
Difficulty level
Moderate
Process Duration
-
Result
No response
Round 1 - Aptitude Test 

It was a aptitude test with unit test cases where you have to create election poll application in react

Interview questions from similar companies

I appeared for an interview in Jan 2021.

Round 1 - Coding Test 

(3 Questions)

Round duration - 120 minutes
Round difficulty - Hard

This round was very difficult. I never do these much difficulty level of coding questions. But i give my best, and just do every questions by using step by step process.

  • Q1. 

    Hourglass Pattern Problem Statement

    Given an integer 'N', print an hourglass pattern based on the value of 'N'.

    Input:

    The first and only line of input contains an integer, denoting the value of N.

    Out...

  • Ans. 

    Print an hourglass pattern based on the given integer 'N'.

    • Read the integer 'N' as input

    • Print the top half of the hourglass pattern with decreasing numbers

    • Print the bottom half of the hourglass pattern with increasing numbers

    • Handle the constraints for 'N' values between 1 and 50

  • Answered by AI
  • Q2. 

    BFS Traversal in a Graph

    Given an undirected and disconnected graph G(V, E) where V vertices are numbered from 0 to V-1, and E represents edges, your task is to output the BFS traversal starting from the ...

  • Ans. 

    BFS traversal in a disconnected graph starting from vertex 0.

    • Use BFS algorithm to traverse the graph starting from vertex 0.

    • Explore neighbor nodes first before moving to the next level neighbors.

    • Consider bidirectional edges in an undirected graph.

    • Output the BFS traversal sequence for each test case in a separate line.

    • Ensure the BFS path starts from vertex 0 and print connected nodes in numerical sort order.

  • Answered by AI
  • Q3. 

    Sort a Stack Problem Statement

    You are given a stack. Your task is to sort the elements within the stack in ascending order using only push and pop operations. You are allowed to use one additional stack ...

  • Ans. 

    Sort a given stack in ascending order using only push and pop operations with the help of an additional stack.

    • Use one additional stack to assist in sorting the elements.

    • Pop elements from the input stack and push them onto the auxiliary stack in sorted order.

    • Keep track of the current minimum element to maintain ascending order.

    • Pop elements from the auxiliary stack back to the input stack to get the sorted order.

  • Answered by AI
Round 2 - Coding Test 

(2 Questions)

Round duration - 90 minutes
Round difficulty - Easy

This round is also coding round in this round we have a small video call interaction too, in which hr ask few questions to only those whose coding question is correct.

  • Q1. 

    Next Smaller Palindrome Problem Statement

    You are given a palindrome number represented as a string S. Your task is to find the largest palindrome number that is strictly less than S.

    Example:

    Input:
    T...
  • Ans. 

    Find the largest palindrome number strictly less than a given palindrome number.

    • Iterate from the middle towards the start of the number and decrement the digits to create the largest palindrome less than the given number.

    • Handle cases where the number is all '9's by changing the middle digit to '9' and decrementing the rest of the digits.

    • If the number has an odd length, simply mirror the first half to create the largest

  • Answered by AI
  • Q2. 

    Rotting Oranges Problem Statement

    You are given a grid containing oranges where each cell of the grid can contain one of the three integer values:

    • 0 - representing an empty cell
    • 1 - representing a fre...
  • Ans. 

    Find minimum time to rot all fresh oranges adjacent to rotten oranges in a grid.

    • Use Breadth First Search (BFS) to simulate the rotting process.

    • Track the time taken to rot all fresh oranges.

    • Return -1 if all fresh oranges cannot be rotten.

    • Handle edge cases like empty grid or no fresh oranges.

  • Answered by AI

Interview Preparation Tips

Professional and academic backgroundI applied for the job as Software Development in GurgaonEligibility criteriaAbove 7 cgpaZIGRAM interview preparation:Topics to prepare for the interview - OOPS , Data Structures, Dynamic Programming, Algorithms from variuos coding platforms , Database Management System, Operating System, Web developmentTime required to prepare for the interview - 2 monthInterview preparation tips for other job seekers

Tip 1 : Relax and don't stress. Practice
Tip 2 : Build Resume according to Job Description , but don't lie.
Tip 3 : Have good projects and knowledge regarding important subjects related to interviews

Application resume tips for other job seekers

Tip 1 : Include only genuine information, never lie in resume , it will impact to bad impression. 
Tip 2 : Skills relevant to Job Description
Tip 3 : Resume should not be more than 2 pages 
Tip 4 : Have some projects and internship on your resume because it will give good impression

Final outcome of the interviewSelected

Skills evaluated in this interview

Interview experience
5
Excellent
Difficulty level
Easy
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via AmbitionBox

Round 1 - Coding Test 

Java, spring,springboot

Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. Angular pipes, customization in angular
  • Q2. CDN, SSR, SSG questions
Round 2 - Coding Test 

Find duplicates in an array

Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-

I applied via Campus Placement

Round 1 - Aptitude Test 

Aptitude questions with 2-3 coding questions

Round 2 - Technical 

(2 Questions)

  • Q1. Input-wwwrrrrttttuu Output - w3r4t4u2
  • Q2. Interpreter vs compiler
  • Ans. 

    Interpreter executes code line by line, compiler translates code into machine code before execution.

    • Interpreter translates code into machine code line by line during runtime

    • Compiler translates code into machine code before execution

    • Interpreted languages include Python, JavaScript

    • Compiled languages include C, C++

  • Answered by AI
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Naukri.com and was interviewed before Jan 2024. There was 1 interview round.

Round 1 - Technical 

(1 Question)

  • Q1. Oops? .net core features
Interview experience
3
Average
Difficulty level
Hard
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Campus Placement and was interviewed in Sep 2023. There were 4 interview rounds.

Round 1 - Aptitude Test 

Aptitude test was of 1 hr

Round 2 - Coding Test 

It was about 1 hr duration

Round 3 - Technical 

(2 Questions)

  • Q1. What do you know about oops
  • Ans. 

    Object-oriented programming paradigm focusing on objects and classes

    • Encapsulation: Bundling data and methods that operate on the data into a single unit (object)

    • Inheritance: Ability of a class to inherit properties and behavior from another class

    • Polymorphism: Ability to present the same interface for different data types

    • Abstraction: Hiding the complex implementation details and showing only the necessary features

  • Answered by AI
  • Q2. Tell me about encapsulation
  • Ans. 

    Encapsulation is the concept of bundling data and methods that operate on the data into a single unit.

    • Encapsulation helps in hiding the internal state of an object and restricting access to it.

    • It allows for better control over the data by preventing outside interference.

    • Encapsulation also promotes code reusability and modularity.

    • Example: In object-oriented programming, classes encapsulate data fields and methods to ope

  • Answered by AI
Round 4 - HR 

(2 Questions)

  • Q1. How do you manage your team
  • Q2. Why should I hire you

Skills evaluated in this interview

Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Coding Test 

2 Query question and 3 coding questions

Round 2 - Technical 

(4 Questions)

  • Q1. Basic oops , Java script and Networking questions.
  • Q2. What is object orienteered programming.
  • Ans. 

    Object oriented programming is a programming paradigm based on the concept of objects, which can contain data and code.

    • Objects are instances of classes, which define the structure and behavior of the objects.

    • Encapsulation, inheritance, and polymorphism are key principles of object oriented programming.

    • Example: Java, C++, Python are popular languages that support object oriented programming.

  • Answered by AI
  • Q3. Different Events in java script
  • Ans. 

    Events in JavaScript are actions or occurrences that happen in the browser that the code can respond to.

    • Events can be triggered by user actions (like clicking a button), browser actions (like page load), or system events (like a timer expiring)

    • Event listeners are used to listen for and respond to events

    • Common events include click, mouseover, keydown, submit, etc.

  • Answered by AI
  • Q4. Event listeners
Round 3 - Coding Test 

Project , coding question, DBMS

Round 4 - HR 

(1 Question)

  • Q1. Basic personal details

Skills evaluated in this interview

Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Aptitude Test 

It was an easy online test

Round 2 - Coding Test 

Question relates to graph like minimum spanning tree,hashing questiond

Round 3 - HR 

(1 Question)

  • Q1. Projects related to questions
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Campus Placement and was interviewed in Apr 2024. There were 2 interview rounds.

Round 1 - Coding Test 

On hacker rank , included subjects like DBMS , OS and coding questions on priority queue

Round 2 - Technical 

(2 Questions)

  • Q1. Questions on OOPS
  • Q2. One DSA question on HashMap

HackerRank Interview FAQs

How many rounds are there in HackerRank React Js Frontend Developer interview?
HackerRank interview process usually has 1 rounds. The most common rounds in the HackerRank interview process are Aptitude Test.

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HackerRank React Js Frontend Developer Interview Process

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Interview experience

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