Java

Could you explain what a Servlet is in the context of Java web development?

Junior — Middle

СБЕРСБЕР Тех

What is the difference between HashMap and IdentityHashMap?

What are the purposes of functional interfaces like Consumer<T>, DoubleConsumer, IntConsumer, and LongConsumer?

How much additional memory is allocated when calling the LinkedList.add() method?

What is a LinkedList?

Is it mandatory to specify the alt attribute in the <img> tag?

What is the difference between a Docker image and a running Docker container?

What methods have you used to improve the performance and scalability of relational databases in your projects?

How can you create and use functional interfaces in Java?

Junior — Middle

Aston

What needs to be considered to ensure the proper functioning of the TreeSet data structure?

Have you used the jOOQ library in your projects?

Junior — Middle

Газпромбанк

What data structure is used in ArrayList?

What are the main stages and aspects involved in the software development process?

Junior — Middle

ОТП Банк

Why is the main method considered static?

What type of exception would you use to handle a situation where it is impossible to establish a connection with a microservice in a booking system?

Junior — Middle

СБЕР

What is ClassLoader in Java?

Have you used component orchestration mechanisms or services in your last project?

Junior — Middle

Газпромбанк

What is the purpose of the IdentityHashMap class in Java?

How can you undo changes and revert to a previous commit state in git?

Have you developed your own classes for error and exception handling in your projects?