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Senior Developer Java Interview Questions

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5,296 senior developer java interview questions shared by candidates

Java Questions like: - Difference between a StringBuilder and a StringBuffer - Difference between a ArrayList and LinkedList - hashCode() and equals() Spring Framework and SpringBoot - What is the core foundation of Spring Framework - What is the difference between SpringBoot and Spring Framework - Beans lifecycle - @Autowired annotation - @EnableAutoConfiguration Others - Scalability - CI/CD, what is the CI and what is the CD Databases - Difference between Relational and Non Relational Databases Code Challenge: - Find the longest substring of unique characters in a String
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Senior Java Backend Developer

Interviewed at EPAM Systems

4★
Feb 16, 2026

Java Questions like: - Difference between a StringBuilder and a StringBuffer - Difference between a ArrayList and LinkedList - hashCode() and equals() Spring Framework and SpringBoot - What is the core foundation of Spring Framework - What is the difference between SpringBoot and Spring Framework - Beans lifecycle - @Autowired annotation - @EnableAutoConfiguration Others - Scalability - CI/CD, what is the CI and what is the CD Databases - Difference between Relational and Non Relational Databases Code Challenge: - Find the longest substring of unique characters in a String

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