EPAM Systems Senior Software Engineer Interview Questions, Process, and Tips

Q1. Output list of palindrome strings from a given string.
Ans. 
Output list of palindrome strings from a given string.
• Iterate through each substring in the given string and check if it is a palindrome.

• Use two pointers approach to check if a substring is a palindrome.

• Store palindrome substrings in an array and return the array.
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Q2. Given a matrix, when you encounter a 0, make all the elements in the corresponding row and column to 0.
Ans. 
Given a matrix, replace rows and columns with 0 when encountering a 0.
• Iterate through the matrix and store the row and column indices of 0s in separate sets.

• Iterate through the sets and update the corresponding rows and columns to 0.
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Q3. Working of Kafka, the flow of a message, using partitions, load balancing with Consumers.
Ans. 
Kafka is a distributed streaming platform that allows for the flow of messages through topics, partitions, and consumers.
• Kafka is a distributed streaming platform that allows producers to publish messages to topics.

• Topics are divided into partitions, which allow for parallel processing and scalability.

• Producers can specify a key for a message, which determines the partition to which the message will be sent.

• Consumers c...read more
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Q4. Microservice based system design.
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Q5. Design patterns - Factory
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Coding questions based on real time

Q1. About projects worked on
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Q2. Technical skills
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Q1. Stock buy sell problem
Ans. 
Find the maximum profit by buying and selling stocks once.
• Iterate through the array and keep track of the minimum price seen so far.

• Calculate the profit by subtracting the current price with the minimum price.

• Update the maximum profit if a higher profit is found.

• Return the maximum profit at the end.
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Q2. Solid principle
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Q1. What is dependency injection
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Dependency injection is a design pattern in which components are given their dependencies rather than creating them internally.
• Allows for easier testing by providing mock dependencies

• Promotes loose coupling between components

• Improves code reusability and maintainability

• Examples: Constructor injection, Setter injection, Interface injection
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Q2. Solid prinicple
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