Tell about the hierarchy of collections in Java.
Middle
184
Java
14849
265
-- There are tables with the following structure Employee id (PK) name salary dep_id(FK department.id) Department id (PK) name -- write a query that returns a list of all department names with the maximum salary in each department select d.name, MAX(e.salary) from Department d left join Employee e on e.dep_id = d.id group by d.name
Senior
184
What is the contract between equals and hashCode?
Senior
184
What microservice architecture patterns do you know?
Senior
184
Are we talking about metadata or transactional data when optimizing objects?
Senior
184
What is the difference between checked and unchecked exceptions? When should RuntimeException be used?
Senior
184
Can you name alternative ways to implement thread synchronization similar to synchronized?
Junior — Middle
184
Have you had experience working with a non-standard WeakReference class (or similar)?
Senior
184
Who prepared such configurations, as it was arranged in your team?
Middle
184
The client is trying to withdraw funds that are no longer available (fraud). What will happen on the developer's side?
184
What problems can arise when returning a JPA entity from a repository and how to avoid them?
Middle+
184
Можно ли заменить right join на left join, изменяя порядок таблиц в SQL-запросе?
Junior — Middle
184
How will the reading of topics and partitions be distributed among Processing Service instances (scaling)?
Senior
184
Task: Given two lists, output the elements of the first list that are not in the second. Write a solution in Java.
Senior
184
What is @ComponentScan used for?
Senior
184
What is gRPC and what are its advantages?
Senior
184
Have you had leadership experience?
Senior
184
Is it possible to use volatile for a long variable and in what scenarios is it safe?
184
Tell about your work experience
Senior
183
Does Spring Security generate a 404 error on its own?
Senior
183