What are optimistic and pessimistic locking? How to implement them?
Middle+
161
Java
14621
265
Explain the concept of 'happens before' in the context of modeling event sequences in multithreaded programming.
Middle — Senior
160
Could you describe how the workflow was organized at your last workplace?
Junior — Middle
159
How to understand from the request plan that indexes are missing?
Middle+
159
Can you tell about different approaches to inheritance used in JPA for modeling relationships between entities?
Junior — Middle
159
Have you had experience working within the Scrum methodology?
Junior — Middle
159
Why is the String class declared as final in Java?
Junior — Middle
158
What method of organizing and managing branches and commits in Git do you prefer to use in your work?
Junior — Middle
157
class ExamResult { String studentName; int subjectId; int mark; //1,2,3,4,5 } List<String> getTop5Students(List<ExamResult> list) { }
Middle+
156
What methods can be used to prevent or eliminate deadlocks in a system?
Junior — Middle
155
Have you had experience using GPCT templates in your work?
Junior — Middle
155
Is it safe and reliable to store data in Kafka for a long period?
Junior — Middle
154
Why does a query execute quickly on a test stand but slowly in production, even though the data is the same? How to investigate?
Middle+
154
What test scenarios do you implement to verify modules or functions in the code?
Junior — Middle
152
How can two microservices share access to a single database?
Junior — Middle
151
Explain the differences between Future and CompletableFuture classes in the context of asynchronous programming in Java.
150
What happens to a message in Kafka if an exception is thrown during its processing (but the application does not crash)?
Middle+
150
What are the differences between Spring and Spring Boot frameworks in Java application development?
149
What methods and tools are used for organizing data streaming synchronization in Java?
Junior — Middle
149
What is the main purpose of the Apache Kafka system and why is it widely used in modern projects?
Middle
149