Java

Can you explain what happens when hash codes of different objects match in the hashCode() method?

What is your experience with using ConcurrentHashMap in your projects?

How do you implement adding a new element to a HashMap data structure?

How does Kafka guarantee the security and integrity of transmitted data?

What methods and tools are used in Spring Data JPA for forming flexible and dynamic queries?

How is related entity loading implemented when using FetchType.EAGER in JPA?

Explain what atomicity means in the ACID model and why it is important for transaction processing.

Should an index be created on every column of a table as part of database optimization?

What methods can be used to split a monolithic application into more modules or services?

Can you explain the concept of the State pattern and how it is used in object-oriented programming?

Can memory leak issues be detected by analyzing the call stack?

Did you independently determine the complexity of the task?

How do you usually check the code of colleagues or subordinates?

What happens if you insert a record with a null key into a HashMap when such a record already exists?

Tell us about your experience with setting up and using Jenkins pipelines in projects.

Can you list the main interfaces used in JDBC for working with databases?

What methods and principles can be used to implement REST API when designing web services?

How to differentiate migration tools Flyway and Liquibase based on their capabilities and approaches?

Is the Heap data structure used in RAM for data organization?

How are the equals and hashCode methods related in Java, and why is it important to implement them correctly together?

Junior — Middle

Альфа-БанкВи6 СервисесМВидео+11