EPAM Systems Software Engineer Interview Questions, Process, and Tips

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
Ans. 
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
Ans. 
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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Q1. Questions related to core java like hashmap working, etc. SpringBoot annotations.
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Q2. Coding question on hashmap and stream api.
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Q1. Design patterns scenario based questions.
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Q2. Min heap, max heap
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