Java

How to extract the first or only element from a List collection?

How can you determine how many times a specific word appears in a string consisting of words?

What approach or data structure would you use to store and display a family tree in a relational database?

Have you participated in configuring or automating development and delivery processes in your last project?.

Have you had experience using profiling tools to analyze application performance?

What class or structure is used when developing REST API to retrieve information from a database?

What role did you play in your previous projects?

How did you configure and manage the placement of the PostgreSQL database in your last project?

Have you managed optimization and database monitoring questions in your last job?

How to implement the Singleton pattern in Java?

What version of Spring Boot have you used in your projects?

How can you determine the amount of memory consumed by a Java application launched from a *.jar file using the command java -jar, in case of a 'No heap space' error?

Have you ever tried using the PostgreSQL database in your projects?

Could you tell me more about your organization and its activities?

Can you list and explain the main types of garbage collectors used in Java?

How do different versions of the Java environment differ, and how can these differences affect application development?

Can you explain what the Vaadin framework is and its main features?

How to implement a Singleton pattern with lazy initialization in Java?

How can multithreading be implemented in a high-load service that performs many similar heavy tasks?

How do you evaluate your main achievements outside of professional activity?