Java

What is the difference between the map and flatMap methods in the Stream API when processing data streams?

What is the main purpose of the Kafka Streams component in data processing architecture?

What is the role of the put() method in the HashMap data structure?

What is your experience in writing and using integration tests in projects?

What distinguishes a standard variable from a variable implemented through ThreadLocal?

Explain the sequence of processing an incoming HTTP request in the Spring MVC framework.

In which situations is it recommended to create a custom implementation of the hashCode method?

What methods can be used to replace or isolate a Bean in integration tests to verify functionality

Have you experience working within sprints or short development cycles?

Explain the concept of 'happens before' in the context of modeling event sequences in multithreaded programming.

Middle — Senior

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Can you explain how the @SpringBootTest annotation works in Spring Boot tests?

Tell us about your experience with batch data updates.

Tell about your experience applying SOLID principles in practice.

How is the hash bucket index determined for inserting an element into a HashMap using algorithmic calculations?

What is the issue with thread safety in the Prototype pattern?

What design patterns have you used in your practice?

What are the main parameters to consider when creating indexes for a database?

Tell us about your development experience using Java EE technologies.

Can you explain what Kafka Streams is and how it is used for stream processing?

How does HashMap behave when trying to insert a key-value pair where the value is null, if such a pair already exists in the data structure?