What happens inside a HashMap data structure when a new key-value pair is added?
Junior — Middle
211
Java
14686
265
What are Spring Profiles and how to configure an application for different environments? How to influence the bean creation process?
Senior
211
How can the efficiency of message processing in a Kafka Topic be improved when using two Consumers in a queue?
Junior — Middle
211
Describe the basic hierarchy of exceptions in Java. What are checked and unchecked exceptions?
Senior
211
What income level do you consider?
Middle
211
What is the purpose of the @Component annotation in Spring?
Junior — Middle
211
Design relationships (tables of messages and agents) and write an SQL query that returns the top 5 agents whose responses are liked by users. The reaction field takes values -1, 0, 1.
Senior
211
Where and how to correctly integrate PostgreSQL for conducting unit tests?
Junior — Middle
211
Is it possible to implement synchronous interaction via Kafka and asynchronous via REST?
Senior
211
Do you have experience connecting and interacting with various services in a system?
Junior — Middle
211
What is the role of JSESSIONID in cookies and how is it used in the context of server sessions?
Junior — Middle
211
In what situations is it preferable to use exceptions that occur during program execution?
Junior — Middle
211
What tools or classes from standard libraries have you used for thread synchronization?
Junior — Middle
211
Have you worked with the Spring framework for application development?
Junior — Middle
211
Have you had experience working with databases that used multiple natural keys?
Junior — Middle
211
Can you list the main characteristics and features of the Spring framework?
211
How does HashMap behave when using Hibernate Entity objects as keys if the equals and hashCode methods are not overridden?
Junior — Middle
210
How can you create and start a thread in Java?
Junior — Middle
210
What mechanisms does JPA use to organize the loading of related objects?
Junior — Middle
210
What is your experience with using reflection in programming?
Junior — Middle
210