epam java developer interview questions

certainly! preparing for an interview as a java developer at epam (or any tech company) involves understanding key java concepts, frameworks, best practices, and coding skills. below is a structured guide including common interview questions, explanations, and code examples.

1. core java concepts

a. object-oriented programming (oop)
- **questions**: explain the four principles of oop: encapsulation, inheritance, polymorphism, and abstraction.

**example**:


b. collections framework
- **questions**: what is the difference between `list`, `set`, and `map`?

**example**:


2. java 8 features

a. lambda expressions
- **questions**: what are lambda expressions and how are they used?

**example**:


b. streams api
- **questions**: explain the streams api and its advantages.

**example**:


3. exception handling

- **questions**: what are checked and unchecked exceptions? how do you handle exceptions in java?

**example**:


4. multithreading

- **questions**: how do you create a thread in java? explain synchronization.

**example**:


5. design patterns

- **questions**: can you explain singleton and factory design patterns?

**example**:


conclusion

preparing for an epam java developer interview requires a solid understanding of java fundamentals, as well as familiarity with modern features introduced in java 8 and beyond. additionally, understanding design patterns and how to apply them in real-world scenarios is crucial. practice coding problems, and be prepared to discuss your previous projects and experiences as they relate to these concepts.

good luck with your interview preparation!

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