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EPAM Systems Senior Java Developer Interview Questions, Process, and Tips

Updated 26 Nov 2024

Top EPAM Systems Senior Java Developer Interview Questions and Answers

  • Q1. what is equals and hashcode and does Object class implement equals method ?
  • Q2. What are other principles apart from SOLID for best coding practices.
  • Q3. What happens when the Liskov Substitution principle breaks?
View all 13 questions

EPAM Systems Senior Java Developer Interview Experiences

8 interviews found

Interview experience
3
Average
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(10 Questions)

  • Q1. Find the kth Largest element of array using Stream API (java 8)
  • Ans. 

    Use Stream API to find the kth largest element in an array of strings.

    • Convert array of strings to Stream

    • Sort the Stream in reverse order

    • Skip k-1 elements and get the kth element

  • Answered by AI
  • Q2. SQL Query to find highest salary of employee in each department
  • Ans. 

    Use SQL query to find highest salary of employee in each department

    • Use GROUP BY clause to group by department

    • Use MAX() function to find highest salary in each group

    • Join the employee table with department table to get department information

  • Answered by AI
  • Q3. Threads, Race condition in thread
  • Q4. Hibernate Object Lifecycle
  • Q5. What features were introduced in Java 8?
  • Ans. 

    Java 8 introduced features like lambda expressions, functional interfaces, streams, and default methods.

    • Lambda expressions allow you to pass functionality as an argument to a method.

    • Functional interfaces have a single abstract method and can be used with lambda expressions.

    • Streams provide a way to work with sequences of elements and perform aggregate operations.

    • Default methods allow interfaces to have method implementa

  • Answered by AI
  • Q6. Internal working of hashmap in Java 8?
  • Ans. 

    HashMap in Java 8 uses an array of linked lists to store key-value pairs, with bucketing and resizing for efficient retrieval.

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

    • Each element in the array is a bucket, and each bucket can have multiple entries

    • Hashing is used to determine the index of the array where the key-value pair will be stored

    • In case of hash collisions, entries are stored in a ...

  • Answered by AI
  • Q7. ACID Properties, SOLID Properties
  • Q8. What happens when the Liskov Substitution principle breaks?
  • Ans. 

    Code becomes less maintainable and can lead to unexpected behavior.

    • Violates the principle of substitutability, leading to unexpected behavior in subclasses.

    • May result in code that is harder to understand and maintain.

    • Can lead to bugs and errors that are difficult to trace back to the violation of the principle.

    • Example: If a subclass overrides a method in a way that changes its behavior significantly, it can break the L

  • Answered by AI
  • Q9. AWS services worked on? Features of AWS?
  • Ans. 

    Worked on AWS services like EC2, S3, RDS, Lambda, and more. Familiar with features like scalability, security, and cost-effectiveness.

    • Worked on EC2 for scalable computing power

    • Utilized S3 for secure and durable storage

    • Managed RDS for relational database management

    • Implemented Lambda for serverless computing

    • Familiar with features like scalability, security, and cost-effectiveness

  • Answered by AI
  • Q10. Encapsulation vs Abstraction?
  • Ans. 

    Encapsulation focuses on hiding the internal state of an object, while abstraction focuses on showing only the necessary details of an object.

    • Encapsulation is the concept of bundling the data (attributes) and methods (behaviors) that operate on the data into a single unit (class).

    • Abstraction is the concept of hiding the implementation details and showing only the necessary features of an object.

    • Encapsulation helps in d...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - EPAM is obsessed with Stream API in Java 8. Prepare well in Java 8. The interviewer is friendly and doesn't waste time if you don't know about the technology.

Skills evaluated in this interview

Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via LinkedIn

Round 1 - Technical 

(5 Questions)

  • Q1. What is equals and hashcode and does Object class implement equals method ?
  • Ans. 

    equals and hashcode are methods in Java used for comparing objects and generating hash codes respectively. Object class does implement equals method.

    • equals method is used to compare two objects for equality. It is overridden in most classes to provide custom comparison logic.

    • hashcode method is used to generate a unique integer value for an object. It is used in hash-based collections like HashMap.

    • Object class does impl...

  • Answered by AI
  • Q2. What are the time complexities of various data structures.
  • Ans. 

    Time complexities of data structures vary based on operations like insertion, deletion, search, etc.

    • Arrays - O(1) for access, O(n) for insertion/deletion

    • Linked Lists - O(n) for access, O(1) for insertion/deletion at head/tail

    • Stacks - O(1) for push/pop operations

    • Queues - O(1) for enqueue/dequeue operations

    • Hash Tables - O(1) for average case search/insert/delete

    • Binary Trees - O(log n) for search/insert/delete in balanced...

  • Answered by AI
  • Q3. What is D in SOLID principles.
  • Ans. 

    D stands for Dependency Inversion Principle in SOLID principles.

    • High-level modules should not depend on low-level modules. Both should depend on abstractions.

    • Abstractions should not depend on details. Details should depend on abstractions.

    • Example: Using interfaces to decouple classes and allow for easier testing and maintenance.

  • Answered by AI
  • Q4. What are other principles apart from SOLID for best coding practices.
  • Ans. 

    Other principles for best coding practices include DRY, KISS, YAGNI, and design patterns.

    • DRY (Don't Repeat Yourself) - Avoid duplicating code by creating reusable functions or classes.

    • KISS (Keep It Simple, Stupid) - Write simple and easy-to-understand code rather than overcomplicating it.

    • YAGNI (You Aren't Gonna Need It) - Only implement functionality that is needed at the present moment, avoiding unnecessary features.

    • D...

  • Answered by AI
  • Q5. Interviewer asked to write code: 1. How to find if any binary tree is symmetrical. 2. Print even numbers using Java 8 Streams.

Interview Preparation Tips

Interview preparation tips for other job seekers - Be focus on basics. If basics are good, you can crack any technical rounds.

Skills evaluated in this interview

Senior Java Developer Interview Questions Asked at Other Companies

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Q5. Why is Java considered platform-independent while the Java Virtua ... read more
Interview experience
3
Average
Difficulty level
-
Process Duration
-
Result
-
Round 1 - One-on-one 

(1 Question)

  • Q1. How tree set works
  • Ans. 

    Tree set is a sorted set implementation based on a binary search tree.

    • Tree set stores elements in sorted order using a binary search tree

    • It does not allow duplicate elements

    • Operations like add, remove, and search have O(log n) time complexity

    • Example: TreeSet treeSet = new TreeSet<>();

  • Answered by AI

Skills evaluated in this interview

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

I applied via Naukri.com and was interviewed in May 2024. There was 1 interview round.

Round 1 - Technical 

(2 Questions)

  • Q1. Basic Java, Spring Boot, Microservices
  • Q2. Solid Design principles, Design Patterns, AWS Cloud

EPAM Systems interview questions for designations

 Java Developer

 (12)

 Senior Developer

 (3)

 Java Full Stack Developer

 (2)

 Java Developer Team Lead

 (1)

 Senior Android Developer

 (3)

 Senior Software Developer

 (2)

 Senior Web Developer

 (1)

 Senior Salesforce Developer

 (1)

Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I was interviewed in Feb 2024.

Round 1 - HR 

(1 Question)

  • Q1. HR would ask the basic details about you and check the communication skills as well.
Round 2 - Technical 

(4 Questions)

  • Q1. In this round, Below questions were asked, 1. Questions on Java basics like generics, garbage collection etc, Java 8 questions. 2. Some coding questions(medium standard) 3. Serching and sorting algorithms ...
  • Q2. Core Java questions like generics, Garbage collection etc
  • Q3. Java 8 questions
  • Q4. Java coding questions

Get interview-ready with Top EPAM Systems Interview Questions

Interview experience
2
Poor
Difficulty level
Hard
Process Duration
Less than 2 weeks
Result
No response

I applied via Naukri.com and was interviewed in Sep 2024. There was 1 interview round.

Round 1 - Coding Test 

The first round was HR, which discussed company policy; the second round was technical.

Interview Preparation Tips

Interview preparation tips for other job seekers - The process of interviewing was so lengthy, Take technical round if selected then will talk to HR ,their is no need to understand interview policy to us before interview.
Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(1 Question)

  • Q1. Internals of LinkedHashMap
  • Ans. 

    LinkedHashMap is a subclass of HashMap with predictable iteration order based on insertion order.

    • Maintains a doubly-linked list of entries to preserve insertion order

    • Supports access-order and insertion-order modes

    • Access-order mode reorders entries based on access frequency

  • Answered by AI

Skills evaluated in this interview

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
-
Result
No response

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

Round 1 - Technical 

(1 Question)

  • Q1. One easy Array based DSA, Core java, java streams

Interview questions from similar companies

I applied via Company Website and was interviewed before Dec 2020. There were 4 interview rounds.

Interview Questionnaire 

1 Question

  • Q1. Questions on Java,SQL,some trending technologies(IOT,Big data),pattern questions, programming questions with different approaches.

Interview Preparation Tips

Interview preparation tips for other job seekers - Prepare basics of DSA, have knowledge about the databases, some common dml ,ddl statements, programming knowledge of a particular language like C,Java, python,etc...have good command on oops concepts... little bit of frameworks knowledge will also help

I applied via Newspaper Ad and was interviewed before Jun 2021. There were 3 interview rounds.

Round 1 - Aptitude Test 
Round 2 - Technical 

(1 Question)

  • Q1. Basic questions of java.
Round 3 - HR 

(1 Question)

  • Q1. Intro and other hr related questions.

Interview Preparation Tips

Interview preparation tips for other job seekers - Cover the basic questions regarding the programming language.
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EPAM Systems Interview FAQs

How many rounds are there in EPAM Systems Senior Java Developer interview?
EPAM Systems interview process usually has 1-2 rounds. The most common rounds in the EPAM Systems interview process are Technical, HR and Coding Test.
How to prepare for EPAM Systems Senior 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 EPAM Systems. The most common topics and skills that interviewers at EPAM Systems expect are Networking, Loans, SQL, Data Structures and System Design.
What are the top questions asked in EPAM Systems Senior Java Developer interview?

Some of the top questions asked at the EPAM Systems Senior Java Developer interview -

  1. what is equals and hashcode and does Object class implement equals metho...read more
  2. What are other principles apart from SOLID for best coding practic...read more
  3. What happens when the Liskov Substitution principle brea...read more

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EPAM Systems Senior Java Developer Interview Process

based on 9 interviews

1 Interview rounds

  • Technical Round
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EPAM Systems Senior Java Developer Salary
based on 7 salaries
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₹24.6 L/yr - ₹38 L/yr
85% more than the average Senior Java Developer Salary in India
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