EPAM Systems Interview Questions, Process, and Tips

JS algorithm and js questions

Q1. JS algorithms and js core questions, typescirpt , reactjs, customs hook building, scenerio questions, unit tests.
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Q2. Flattern of array
Ans. 
Flatten an array of strings into a single string
• Use the flatMap method to concatenate all strings in the array

• Alternatively, use the reduce method to combine all strings into one

• Ensure to handle any nested arrays within the main array
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Q1. Js algorithms and pure react and js questions
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Q1. Not a technical , just previous project questions and contributions
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Coding test on python

Q1. Python and data analyses interviews
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Ask clarifying questions, be polite and pay attention to details

Q1. Bean scopes in Spring boot
Ans. 
Bean scopes in Spring Boot determine the lifecycle and visibility of beans.
• Singleton scope: Default scope, only one instance per Spring container

• Prototype scope: New instance created each time bean is requested

• Request scope: Bean created once per HTTP request

• Session scope: Bean created once per HTTP session

• Application scope: Bean created once per ServletContext
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Q1. About all javascript in depth questions
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Q1. Project Management
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Q2. People Management
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Q3. Agile methodology
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Q1. Risk management
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Q2. Product design and challenges
Ans. 
Product design involves creating a plan for the development of a product, considering user needs and technical constraints.
• Identify user needs and pain points

• Create user personas and user stories

• Consider technical constraints and feasibility

• Iterate on designs based on user feedback

• Collaborate with cross-functional teams
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Q3. Conflict management
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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
Ans. 
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
Ans. 
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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