Java

Where are reference variables and objects located in the JVM memory?

In which cases is it advisable to use the final modifier for variables, methods, or classes?

Does an immutable object possess a unique hashCode that does not change after creation?

What does the term used to denote a method in a functional interface mean?

What is the role of the @Qualifier annotation in dependency injection in Spring?

What aspects or situations in your last project caused dissatisfaction or difficulties?

Junior — Middle

ВТБ

How does the loading and execution of Java code occur in the JVM?

Junior — Middle

Газпромбанк

Can you explain the greedy algorithms and when they are used?

What type of collection is best suited for efficiently adding elements in the middle of the structure?

What is the main interface implemented by the Collection class in Java?

What is the initial number of elements an ArrayList can contain when created without specifying a size?

Junior — Middle

AstonВТБ

Can you explain what Scope means in Maven and how it affects dependency management?

Junior — Middle

IT One

Explain the difference between the JOIN operator and INNER JOIN in SQL.

Can you explain what ResultSet is and how to use it when working with a database?

Junior — Middle

Северсталь-Ифоком

If two objects with the same identifier are created, will they occupy the same memory location and refer to the same instance?

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

Can you explain the concept of caching level and its role in the system?

What types of tests are used in the Test-Driven Development approach?

How to call the default method from an interface in a class that implements this interface?

Can you list and describe different ways to implement a Set in programming?