Java

Why does a ConcurrentModificationException occur when modifying an ArrayList simultaneously during iteration?

Junior — Middle

Т-Банк

Have you created your own filters or panels in Grafana for data visualization?

Junior — Middle

СБЕР

What is the name of the data structure that combines fast insertion of elements and sequential data processing, based on the use of segments or leaves?

Junior — Middle

Газпромбанк

What is the purpose of an object that implements the Runnable interface?

What is Spring used for?

What is the reason that it is not always recommended to use ForkJoinPool for executing tasks?

What prompted you to choose a career in information technology?

Intern — Junior

СБЕР

What are the advantages of buffering in Java?

Can the collect method be used to convert a Stream into a Map?

What is the feature of a composite index if the index is built on three columns, but the search is only performed on the third?

In what ways do you learn and master new information or skills?

Have you used the try-with-resources construct in Java for automatic resource management?

Junior — Middle

IT One

Tell us about memory areas and garbage collector operation in Java.

What are the advantages and disadvantages of using profiling in Spring Boot for optimization?

Junior — Middle

ВТБ

Can you explain the principle of operation of the SortedMap interface and how it differs from a regular Map?

Junior — Middle

СБЕР

What will be the result of calling the allMatch method on an empty data stream?

Junior — Middle

Aston

Can you list the main objects and components used in Apache Kafka?

Junior — Middle

СБЕР

How can the addition of new subclasses to an existing class be prevented?

Middle — Senior

СБЕР

What are the advantages and disadvantages of string pool mechanisms in Java?

What is the fundamental basis or core concept underlying each type of exception in the exception hierarchy?