EPAM Systems Interview Questions, Process, and Tips

MCQ with spark, sql, DBMS

Q1. Memory usage in spark. types of memory
Ans. 
Spark uses two types of memory - storage memory and execution memory.
• Spark uses storage memory to cache and persist data for reuse.

• Execution memory is used for computation and shuffling data between stages.

• Memory management in Spark is crucial for optimizing performance and avoiding out-of-memory errors.
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Q1. Pyspark related questions; coding questions as well.
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Q1. SQL queries on windowing functions
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Q1. Salary discussion as per work experience.
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Q1. Write a code for anagram
Ans. 
Code to check if two strings are anagrams
• Create a function that takes in two strings as input

• Remove all spaces and convert both strings to lowercase

• Sort the characters in both strings and compare if they are equal
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Q2. What are middlewares
Ans. 
Middlewares are software components that act as a bridge between different applications, allowing them to communicate and share data.
• Middlewares can handle requests and responses in web applications

• They can modify or enhance the functionality of an application without changing its core code

• Examples include authentication middleware, logging middleware, and error handling middleware
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Q1. What are structural directives
Ans. 
Structural directives are Angular directives that modify the structure of the DOM by adding, removing, or manipulating elements.
• Structural directives are prefixed with an asterisk (*) in Angular templates.

• They are used to conditionally display or hide elements, repeat elements, or switch between views.

• Examples include *ngIf, *ngFor, and *ngSwitch.
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Q1. No idea depends totally on client
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Q1. Generic questions were asked during interview
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Q2. Mostly basic question they asked
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Q1. Basic stuff we’re discussed
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There were basic to medium level questions on aptitude. Also, some questions on English - verbal were asked.

There were 2 coding questions, basic and medium. Also 10 MCQs on Java.

This was for 30-40 minutes and divided into groups of 10. A topic was given and you needed to present your views.

Q1. Questions on core Java, DSA
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Q2. Questions on DBMS. Also, one or 2 coding questions
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Q1. Basic personality questions
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Q2. And some situation - based questions
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Develop a Minesweeper application.

JavaScript questions regarding objects and arrays.

Q1. Payscale, notice period
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