If several objects refer to each other in a circle but are not used anywhere else, will the GC delete them?
Senior
146
Java
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265
What is well-tested code like? At least 3 criteria. And what is strong coupling and what are its disadvantages? Why is too weak coupling bad?
Senior
145
Code review: what are the most significant comments, and which are the least? List 3 of each.
Senior
145
How does the @Transactional annotation work? How is transactional logic added?
Senior
145
Have you had experience working with Kotlin or reactive programming?
Senior
145
For what tasks have you used agents according to your experience?
Senior
144
What are the main types of indexes in PostgreSQL?
Senior
144
Java service. Response time has increased, some requests are processed for several seconds. What will you look at first? At least 4 points.
Senior
144
Tell us about your last project and what you did there.
Senior
144
What does test quality mean? Please tell us more.
Senior
144
Can any object be added as a key in HashMap?
Senior
143
How did you take heap dumps, analyze them, and automate the process?
Senior
143
How does the mediator pattern differ from proxy?
Senior
142
Have you heard of Zero Copy? What is it?
Senior
141
10 application handlers take tasks from the database. How to prevent two instances from taking the same task?
Senior
141
How to understand if a request uses an index? How to monitor unused indexes?
Senior
141
How else can the problem be solved without anyMatch?
Senior
141
What is the N+1 problem in JPA/Hibernate? How was it solved?
Senior
140
What is sharding?
Senior
140
If an attacker knows the hashing algorithm, will they be able to forge a JWT token?
Senior
140