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Peel-works Java Developer Interview Questions and Answers

Updated 19 Sep 2022

Peel-works Java Developer Interview Experiences

1 interview found

I applied via Naukri.com and was interviewed before Sep 2021. There were 3 interview rounds.

Round 1 - Technical 

(4 Questions)

  • Q1. The internal implementation of HashMap.
  • Ans. 

    HashMap is a data structure that stores key-value pairs and uses hashing to retrieve values.

    • HashMap uses an array of linked lists to store key-value pairs

    • The hash code of the key is used to determine the index of the array

    • If multiple keys have the same hash code, they are stored in the same linked list

    • HashMap uses load factor to determine when to resize the array

    • The default load factor is 0.75

    • HashMap allows null keys a

  • Answered by AI
  • Q2. The internal implementation of HashSet. We only put value in HashSet then how HashSet internally uses HashMap.
  • Q3. What is the difference between HashMap and HashSet?
  • Ans. 

    HashMap is a key-value pair collection while HashSet is a set of unique elements.

    • HashMap allows duplicate values but not duplicate keys

    • HashSet does not allow duplicate values

    • HashMap implements Map interface while HashSet implements Set interface

    • HashMap uses put() method to add elements while HashSet uses add() method

    • Example: HashMap map = new HashMap<>(); HashSet set = new HashSet<>();

Answered by AI
  • Q4. What is the difference between Local Variable, static variable, and instance variable?
  • Ans. 

    Local, static, and instance variables differ in their scope and lifetime.

    • Local variables are declared inside a method and have a limited scope.

    • Static variables belong to the class and are shared among all instances.

    • Instance variables are unique to each object and can be accessed using the object reference.

  • Answered by AI
    Round 2 - Coding Test 

    Write a java program to convert numbers to strings.
    for example:
    10: TEN,
    1559: One Thousand Five Hundred Fifty Nine.

    Round 3 - HR 

    (1 Question)

    • Q1. Only Salary discussion

    Interview Preparation Tips

    Topics to prepare for Peel-works Java Developer interview:
    • Core Java
    • SQL
    • JDBC
    • Java Servlets
    • Framework
    Interview preparation tips for other job seekers - Get Good knowledge of Core java, which is the base of java development

    Skills evaluated in this interview

    Interview questions from similar companies

    I applied via Company Website and was interviewed before May 2018. There were 3 interview rounds.

    Interview Questionnaire 

    2 Questions

    • Q1. Questions about Oops, data structures based on the projects I had done, and my resume
    • Q2. Questions about classes and abstraction

    Interview Preparation Tips

    Interview preparation tips for other job seekers - 2 parts; part 1 is a coding test and part 2 is discussion.

    I applied via Naukri.com and was interviewed before Jul 2019. There were 4 interview rounds.

    Interview Questionnaire 

    3 Questions

    • Q1. Questions about the projects you worked with. About how specific coding challenges were solved. How it could have been done other ways. etc.
    • Q2. About Python versions and differences. Impact on frameworks.
    • Q3. About module design, apis.

    Interview Preparation Tips

    Interview preparation tips for other job seekers - It is a relaxed interview, like a discussion. The questions are tough in that they make you think. Review your previous projects and be honest.

    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
    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
    5
    Excellent
    Difficulty level
    -
    Process Duration
    -
    Result
    -
    Round 1 - Assignment 

    Application developement

    I appeared for an interview in Jun 2021.

    Round 1 - Coding Test 

    (1 Question)

    Round duration - 180 minutes
    Round difficulty - Hard

    The test link had 3 days expiry so I could attempt test anytime. It was conducted on doselect.com

    • Q1. 

      Equilibrium Indices in a Sequence

      You are given an array/list named 'SEQUENCE', which consists of 'N' integers. The task is to identify all equilibrium indices in this sequence.

      Explanation:

      An equilibr...

    • Ans. 

      The task is to find the equilibrium indices of a given sequence, where the sum of elements at lower indices is equal to the sum of elements at higher indices.

      • Iterate through the sequence and calculate the total sum of all elements

      • Initialize a left sum and right sum as 0

      • For each index, update the left sum and right sum and check if they are equal

      • If they are equal, add the index to the equilibrium indices

      • Return the equil

    • Answered by AI
    Round 2 - Video Call 

    (1 Question)

    Round duration - 60 minutes
    Round difficulty - Medium

    Video interview round wherein I was asked to wrote code for the problem statements given by the interviewer. The problems were mainly focused on advanced JS concepts like asynchonous progamming, timers, closures, and data structure problems around arrays, sets, linked list etc.

    • Q1. 

      Rearrange Linked List Problem Statement

      Given a singly linked list in the form 'L1' -> 'L2' -> 'L3' -> ... 'Ln', your task is to rearrange the nodes to the form 'L1' -> 'Ln' -> 'L2' -> '...

    • Ans. 

      The task is to rearrange the nodes of a singly linked list in a specific order without altering the data of the nodes.

      • Iterate through the linked list to find the middle node using the slow and fast pointer technique.

      • Reverse the second half of the linked list.

      • Merge the first and reversed second half of the linked list alternatively to get the desired order.

    • Answered by AI
    Round 3 - HR 

    Round duration - 30 minutes
    Round difficulty - Easy

    This was the last round with HR wherein they judged cultural fit and there was discussion on things like my expectations v/s their expectations etc.

    Interview Preparation Tips

    Professional and academic backgroundI applied for the job as SDE - 1 in BangaloreEligibility criteriaNoSpringworks interview preparation:Topics to prepare for the interview - Javascript/Typescript, NodeJS, MongoDB, SQL, Angular, Data Structures and Algorithms, Object Oriented Programming ConceptsTime required to prepare for the interview - 3 MonthsInterview preparation tips for other job seekers

    Tip 1 : Get well versed with the fundamentals of Javascript including advanced concepts like promises, async/await, generators, higher order functions, closures, currying etc.
    Tip 2 : Do some projects on MERN Stack because a lot of projects here use some or all of those technologies
    Tip 3 : Do prepare for behavioral/cultural-fit questions especially around how you'll handle various stituations during work or how will you manage productivity while working remotely.

    Application resume tips for other job seekers

    Tip 1 : Having projects on MERN stack will give you advantage
    Tip 2 : Do mention if you have any AWS experience.
    Tip 3 : Mention all your internships/past experiences. Keep them crisp and talk about what you did and it's impact/outcome.
    Tip 4 : Any experience/exposure to blockchain will definitely give brownie points.

    Final outcome of the interviewSelected

    Skills evaluated in this interview

    I appeared for an interview in Nov 2021.

    Round 1 - Coding Test 

    Round duration - 30 minutes
    Round difficulty - Easy

    This round mainly consisted of some questions on advanced JS topics like Execution Context, Callback queue, Micro task queue, Promises, etc.

    Round 2 - Telephonic Call 

    (1 Question)

    Round duration - 60 minutes
    Round difficulty - Medium

    This round was more technical compared to the previous one. The interviewer was a senior developer. If questions were not answered, answers would be given/explained.

    • Q1. What are some aggregate operators in MongoDB?
    • Ans. 

      Aggregate operators in MongoDB are used for data aggregation and manipulation.

      • Some aggregate operators in MongoDB include $sum, $avg, $min, $max, $push, $addToSet, $first, $last, $project, $match, $group, $sort, $limit, $skip.

      • Example: db.collection.aggregate([{$group: {_id: '$field', total: {$sum: '$value'}}}])

    • Answered by AI
    Round 3 - HR 

    Round duration - 30 minutes
    Round difficulty - Easy

    This round was mainly to assess my experience level, roles, and responsibilities from my previous company. Salary negotiations also happened here.

    Interview Preparation Tips

    Professional and academic backgroundI applied for the job as SDE - 1 in BangaloreEligibility criteriaNo criteriaSpringworks interview preparation:Topics to prepare for the interview - Databases, Asynchronous programming, Promises, JavaScript, DS.Time required to prepare for the interview - 1 monthInterview preparation tips for other job seekers

    Tip 1 : Learn about Execution Context, Promises in JS
    Tip 2 : Learn about indices, Difference between different databases
    Tip 3 : Error handling and Exceptions

    Application resume tips for other job seekers

    Tip 1 : Put in what you’ve done and not what you could have done.
    Tip 2 : Keep it short and simple

    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

    Peel-works Interview FAQs

    How many rounds are there in Peel-works Java Developer interview?
    Peel-works interview process usually has 3 rounds. The most common rounds in the Peel-works interview process are HR, Technical and Coding Test.
    How to prepare for Peel-works Java Developer interview?
    Go through your CV in detail and study all the technologies mentioned in your CV. Prepare at least two technologies or languages in depth if you are appearing for a technical interview at Peel-works. The most common topics and skills that interviewers at Peel-works expect are Algorithms, Collections, Data Structures, J2EE and JUnit.
    What are the top questions asked in Peel-works Java Developer interview?

    Some of the top questions asked at the Peel-works Java Developer interview -

    1. What is the difference between Local Variable, static variable, and instance va...read more
    2. What is the difference between HashMap and HashS...read more
    3. The internal implementation of HashM...read more

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