Java

What approaches exist for improving the performance of Java applications?

What does the NULL value mean in SQL?

To which category of models does Kafka architecture belong: active push or pull models?

Junior — Middle

AstonООО Антара

How can an object be made immutable after its creation?

Junior — Middle

Aston

What tasks have you solved using design patterns?

What are the ways to implement a REST API for retrieving information from a database?

What is the root class for all objects in Java?

In what cases and for which operations is indexing used in databases?

Can multiple threads access the same object in the Heap area simultaneously?

What are the advantages and disadvantages of using a constructor when implementing dependencies in code?

Junior — Middle

СБЕР

Can you name two books you read in 2023?

Junior — Middle

СБЕР

Can a wrapper class be considered a mutable data type?

Can you explain what application context is within Spring or a similar framework?

What will be the result if you assign a variable using new String and " " and call equals?.

Can you list and describe the main methods of implementing design patterns in code?

What is automatic incrementation in various databases?

What is the role of version control systems in software development?

What methods, using Framework, can be used to implement interaction between different systems?

Junior — Middle

Газпромбанк

How can you extend the functionality of a class that is forbidden to modify by adding a data list to it?

Junior — Middle

СБЕР

What is the role of the HAVING operator in working with groupings and data aggregation?

Junior — Middle

ОТП БанкСБЕР