Java

What is Ajax?

Tell about your experience writing custom annotations in Java.

How to parse JSON in Java? What libraries are used and what does the code look like?

How to handle file (image) upload via HTTP request in Spring MVC and save it to disk?

How to manage transactions in Java code? How is it done through JDBC?

What are servlets? How do they work?

How do sockets work in Java? Is it possible to use them to accept HTTP requests?

Tell us about your experience with JMS and ActiveMQ. What does the code for reading messages from a queue look like?

How to update a character's name (e.g., from Vadim to Dmitry) using Spring Data, knowing its ID?

In what ways have you interacted with databases from Java code? JDBC, JPA, Hibernate?

How to access HTTP request data (query parameters, headers, body) in Spring MVC?

What would a solution look like using Spring Data JPA for the same task?

How to implement caching of reference books from a database in a Java application considering multithreading?

What would a JDBC solution look like for retrieving all people from the persons table born after a certain date?

How do you accept HTTP requests in a Java application? What options are there?

Is it possible to parse JSON without creating a DTO class in advance? How might it look?

Compare XML and JSON: pros and cons of each format.