EPAM Systems Software Development Engineer Intern Interview Questions and Answers

Q1. What is Dependency Injection?
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Q2. How does angular components communicate with each other?
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Q3. How can you optimize a stored procedure in MSSQL?
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Q4. What is Kestrel in .net Core?
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It was an aptitute round and 2 coding questions was there

Q1. Tell me about yourself
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Q2. We had discussion on projects than mentioned in my resume
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Q3. Then he moved to DSA question in which he told to how you will insert node in doubly linked list ,I answered all correctly he appreciated me also but after 5 min one person came and told you can go . I was...read more
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Q1. Java programs related to strings
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Q2. Collections question in java
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OS questions, locking and threads etc

Basic questions on Linked list

Q1. IPC mechanisms in OS, process management
Ans. 
IPC mechanisms in OS facilitate communication between processes, while process management involves creating, scheduling, and terminating processes.
• IPC mechanisms include shared memory, message passing, and sockets.

• Shared memory allows processes to share a portion of memory for communication.

• Message passing involves sending and receiving messages between processes.

• Sockets enable communication between processes over a ne...read more
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Q2. Fibonacci series code
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Q1. What challenging work you did in previous company
Ans. 
Implemented a real-time data processing system to handle large volumes of data efficiently.
• Designed and implemented a distributed system using Apache Kafka for real-time data processing.

• Optimized data processing algorithms to handle large volumes of data without impacting performance.

• Collaborated with cross-functional teams to ensure seamless integration of the system with existing infrastructure.
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Q1. All the questions were from SQL server.
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Q2. How to get 3rd highest salary ?
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To get the 3rd highest salary, you can use a SQL query with the 'LIMIT' and 'OFFSET' keywords.
• Use a SQL query to select distinct salaries in descending order.

• Use the 'LIMIT' keyword to limit the results to 3.

• Use the 'OFFSET' keyword to skip the first 2 highest salaries.

• Example: SELECT DISTINCT salary FROM employees ORDER BY salary DESC LIMIT 1 OFFSET 2;
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Q3. Inner join result of 2 table. Table one [1,1,1,1] table two [1,1,1,1,1,1]
Ans. 
The inner join of two tables with duplicate values results in a combined set of common values.
• Inner join combines rows from both tables where the key columns match

• In this case, the result would be [1,1,1,1,1,1] as all values are common in both tables
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Q4. SSIS Package creation.
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Q5. Latest project explanation
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Developed a web application for tracking and managing project tasks
• Used React.js for front-end development

• Implemented RESTful APIs using Node.js and Express

• Utilized MongoDB for database management

• Incorporated authentication and authorization features for user security
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Q1. What is difference between SQL and NoSQL
Ans. 
SQL is a relational database management system, while NoSQL is a non-relational database management system.
• SQL databases are table-based, NoSQL databases are document, key-value, graph, or wide-column stores

• SQL databases use structured query language for defining and manipulating data, NoSQL databases use different query languages

• SQL databases are vertically scalable, NoSQL databases are horizontally scalable

• SQL databa...read more
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Q2. Why is NoSQL better then SQL
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NoSQL is better for handling unstructured data, providing scalability and flexibility.
• NoSQL databases are better suited for handling unstructured data like social media posts, user-generated content, and IoT data.

• NoSQL databases provide better scalability as they can easily distribute data across multiple servers, allowing for horizontal scaling.

• NoSQL databases offer more flexibility in terms of data model, allowing fo...read more
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Q3. Explain the data pipeline you have worked on.
Ans. 
Designed and implemented a real-time data pipeline for processing and analyzing user behavior data.
• Used Apache Kafka for real-time data streaming

• Utilized Apache Spark for data processing and analysis

• Implemented data transformations and aggregations using Scala

• Stored processed data in a data warehouse like Amazon Redshift

• Built monitoring and alerting systems to ensure data pipeline reliability
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Q4. Managing team
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Q5. What will you do if you have conflict with your manager.
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I would address the conflict directly and professionally, seeking to understand the root cause and find a mutually beneficial solution.
• Schedule a private meeting with the manager to discuss the conflict

• Listen actively to the manager's perspective and express your own calmly

• Seek to find common ground and propose potential solutions

• If necessary, involve HR or a mediator to help resolve the conflict
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Q6. What do you love to do when you are free
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I love to spend my free time hiking, reading, and trying out new recipes in the kitchen.
• Hiking in the mountains or local trails

• Reading fiction and non-fiction books

• Experimenting with new recipes and cooking techniques
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Q1. Salary expectations
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Q2. Family background
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Verbal, reasoning,aptitude

Q1. MCQs related to CS
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2Coding questions and it was moderate level