How can the implementation of the notification filtering system be optimized?
Senior
189
Java
14895
265
Can you explain what is meant by 'context' in the Spring Framework?
Junior — Middle
189
How are CI/CD pipelines described and operated in GitLab?
Senior
189
Tell me about Spring Security: filter chain, SecurityContext, JWT authentication.
Middle
189
How to implement validation for the X-Trace-ID header: if the header is missing — return 400?
Senior
189
How can a security mechanism be implemented to manage user sessions so that users can terminate their sessions themselves?
Junior — Middle
189
What alternatives to Spring do you know?
189
Regarding the universal adapter — was there a single protocol for external payment gateways, or is it an abstraction level?
Senior
189
What is a memory leak?
Senior
189
What is the advantage of reactive programming?
Senior
189
How to swap the values of two variables without using a third variable?
Middle
189
When is it better not to use parallelStream?.
Senior
189
Regarding location — do you live in Moscow?
Senior
189
What protocol was used for interaction with [system/service]?
Senior
189
Does the circuit breaker support the promised TPS of the service, limiting the number of requests?
Senior
189
What happens when the old PostgreSQL master comes up after a failure? How is consistency ensured?
Senior
189
What is the main difference between using the map and flatMap methods in the Stream API when processing data streams?
Junior — Middle
189
What are indexes in PostgreSQL? Pros and cons, types of indexes.
Senior
189
If several objects refer to each other in a circle but are not used anywhere else, will the GC delete them?
Senior
189
How does WAL (Write-Ahead Log) work during writing?
Senior
189