EPAM Systems Full Stack Developer Interview Questions, Process, and Tips

• Q1. Cache implementation in spring boot
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• Q2. Few coding questions
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There are 4 coding questions in first round

• Q1. Some basic statistics questions and data structure questions
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• Q1. Questions on full stack Devlopment
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• Q2. Questions asked on React,Nodejs
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There will be machin test on best on MERN stack

• Q1. Questions on OOPS mainly inheritance Questions on Core Java Tricky questions on collections Questions on Java 8
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• Q2. Questions on JavaScript What is a closure
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Round duration - 100 minutes
Round difficulty - Hard

The test had 3 parts:
1. Aptitude - 20 questions to be done in 25 minutes. (Medium level)
2. Technical MCQs - 25 questions to be done in 35 minutes. (Medium-Hard level) (HTML, JS, CSS, SQL)
3. Coding - 2 out of 3 questions to be done in 40 minutes. 20 minutes were allotted for each question. No switching between the codes was allowed. (1-easy, 2-medium in total)

• Q1. Count Set Bits You are given a positive integer ‘N’. Your task is to find the total number of ‘1’ in the binary representation of all the numbers from 1 to N. S...read more
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• Q2. Smallest number whose digits multiplication is ‘N’ You are given a positive integer ‘N’. The task is to find and return the smallest number, ‘M’, such that the ...read more
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Round duration - 45 minutes
Round difficulty - Medium

It was the first face-to-face technical round. The medium was ModernHire. There was only 1 member in the interview panel. This round tested me on C fundaments, Operating System basics, and problem-solving skills.
Questions asked:
What are the TRUNCATE, DELETE and DROP statements?
What are void elements in HTML?
Define multipart form data?
1. How does the C compiler works?
2. What are deadlocks and why does it happen?
3. How to resolve deadlock?
4. What is a kernel?
5. How to dynamically allocate memory in C?
6. What is makefile?
7. What is multi-threading and why is it useful?
8. What is the need for synchronization in OS?
9. How do you run a program of 10 GB using 2 GB memory?
10. What are semaphores and mutex?
11. How is HashMap implemented?
12. Difference between linker and loader.
13. Importance of header files.
14. What is Dynamic binding?
15. What type of database should you use where transactions are involved?
16. Brief discussion on the Internship experience.

• Q1. Merge Sort Given a sequence of numbers ‘ARR’. Your task is to return a sorted sequence of ‘ARR’ in non-descending order with help of the merge sort algorithm. E...read more
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Round duration - 50 minutes
Round difficulty - Medium

This was a managerial cum technical round. I was asked to introduce myself (both technical details and hobbies). Then I was asked about my internship experiences and what I learnt from them. After that, he asked me questions about the projects mentioned in my resume. He tested my in-depth knowledge of the technologies that I used. He also asked me about the alternative solutions and the drawbacks of my solution.
After that, he asked me to speak about Operating Systems for 5 minutes without giving a pause. Then he asked me to speak about the OSI model and the TCP/IP model for the next 5-10 minutes again without giving a pause. He appreciated my perfomance and gave me a coding question.
What is User-defined function? What are its various types in SQL. What is an Alias in SQL?
Then he asked me whether I had any questions.

• Q1. Find a Node in Linked List You have been given a singly linked list of integers. Write a function that returns the index/position of integer data denoted by ...read more
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Round duration - 15 minutes
Round difficulty - Easy

Typical HR questions were asked in this round.

• Q1. Basic HR Questions

  Introduce yourself.
  Mention something that is not in your resume.
  Why are you fit for this role?
  Why HPE?
  Plans for higher studies.

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