Java

Is a unique hash code automatically provided to each object in Java, or does it only oblige the developer to implement it manually?

Does the HTTP protocol provide data transfer over TCP?

Is it mandatory to use a garbage collector to clear the call stack?

Can the Controller class be considered as beans in the Spring container?

What is the role and purpose of the volatile keyword in programming language?

Junior — Middle

StrokiБАРС группeRaga Infosystem+4

Does the garbage collector free the memory used by the stack during application runtime?

How does the volatile modifier affect working with shared variables in a multithreaded environment?

Could you explain what an Entity is in the context of JPA and how it is used for data mapping?

How do composite indexes differ from regular ones in structure and application in a database?

What is the role of the @Service annotation in Spring and why is it used?

What are the main characteristics that a primary key in a database can have?

What tools are used for monitoring and analyzing the performance of software applications?

Explain the functioning principle of the AtomicInteger class in Java and how it ensures thread safety.

Junior — Middle

AstoneRaga InfosystemSimbirsoft

Is it possible to implement a Spring component that behaves both as a singleton and as a prototype, and how to do it?

What steps are necessary to create your own query in JPA?

What are the differences between component visibility zones in Spring Framework?

Is it mandatory to adhere to the use of Bean in every component of a Spring application?

How do the stack cleanup mechanisms differ in C and Java?

Can you name the types of references used in Java for managing objects?

How to implement inserting a new record into a database using JPA?