EPAM Systems Software Engineer Interview Questions, Process, and Tips

Q1. Internal working of Spring boot.
Ans. 
Spring Boot is a framework that simplifies the development of Java applications.
• Spring Boot provides a pre-configured environment for building and deploying applications.

• It uses an embedded server, such as Tomcat or Jetty, to run the application.

• It also includes a variety of starter dependencies, which can be easily added to the project.

• Spring Boot uses auto-configuration to automatically configure the application base...read more
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Q2. How to make a list immutable in custom objects
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To make a list immutable in custom objects, use the 'tuple' data type instead of 'list'.
• Replace the 'list' data type with 'tuple' to create an immutable list.

• Tuples are similar to lists but cannot be modified once created.

• Immutable lists provide data integrity and prevent accidental modifications.
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Q3. What are the ways to iterate on collections
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Ways to iterate on collections in software engineering
• For loop

• While loop

• Foreach loop

• Iterator

• Stream API

• Lambda expressions
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Q4. Explain the architecture of the current project.
Ans. 
The current project follows a microservices architecture.
• The project is divided into multiple small services that communicate with each other through APIs.

• Each service is responsible for a specific functionality.

• The services are deployed independently and can be scaled as per the requirement.

• The architecture allows for easy maintenance and updates.

• Examples of services include user management, payment gateway, and inven
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Q5. Exception handling in a microservice architecture
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Exception handling is crucial in microservices to ensure fault tolerance and reliability.
• Each microservice should have its own exception handling mechanism.

• Exceptions should be logged and monitored for analysis and improvement.

• Use circuit breakers and retries to handle transient errors.

• Consider using a centralized exception management system for better visibility.

• Ensure error messages are clear and informative for easi
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Q1. In-depth questions on basics of core java
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Q2. Exceptions
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Q3. Memory management
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Q1. Stream Based Problems
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Q2. Spring Boot questions on Annotations
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Q3. SQL questions
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Q1. Stream advanced questions
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Q2. Java 8 features
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Q1. Sorting Algorithms
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Q2. HashMap principles
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HashMap principles involve key-value pairs, hashing, and efficient retrieval.
• HashMap stores key-value pairs using hashing for efficient retrieval.

• Keys must be unique but values can be duplicated.

• HashMap allows null keys and values.

• HashMap is not synchronized, use ConcurrentHashMap for thread safety.
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Q3. Data Structures
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Q4. Spring Fundamentals
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A situational based question

Q1. Print the count of words in a list
Ans. 
Count the number of words in a list of strings
• Iterate through the list of strings

• Split each string by spaces to get individual words

• Increment a counter for each word encountered
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Q2. Check if strings are anagrams
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Check if strings are anagrams by sorting characters and comparing
• Sort characters in each string and compare if they are equal

• Use a hashmap to count characters in each string and compare the counts

• Example: 'listen' and 'silent' are anagrams
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Q1. Family details were asked
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Q2. Situational based questions were asked
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