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Interview experiences & questions tagged Java
Solve a coding problem that involves the HashMap data structure. Focus on efficient operations and potential edge cases.
Answer approximately 10 multiple-choice questions covering Java, Object-Oriented Programming, and Multithreading concepts.
Discuss the differences between @Component, @Service, and @Repository in Spring Boot. Explain bean scopes & lifecycle, the startup process, and the internals of @Transactional along with potential pitfalls.
Explain the following core Java concepts: == vs equals(), the internal workings of HashMap, collision handling (LinkedList vs Tree in Java 8+), load factor (0.75), Java Memory Model, thread safety, and concurrency.
Reverse a linked list in pairs. For example, given the input 1 → 2 → 3 → 4 → 5, the output should be 2 → 1 → 4 → 3 → 5.
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