Explain what a ConcurrentHashMap is and how it ensures safety during parallel data access.
Junior — Middle
258
Java
14621
265
Can you explain what a Spring Boot Starter is and how it simplifies working with Spring Boot applications?
Junior — Middle
256
What are the main tasks solved by the Spring framework in application development?
Junior — Middle
256
Explain the concept of full locking in database management and its features.
256
How is the index of an element determined when accessing an element in an ArrayList, and what is the resulting time complexity?
256
What information is stored inside the Java Virtual Machine (JVM)?
Junior — Middle
255
Can you explain what a double-ended queue based on an array in Java is?
Junior — Middle
252
In which cases is it recommended to use the volatile keyword in Java?
Junior — Middle
252
251
251
Can you explain the concept of optimistic locking and how it works in database management systems?
Junior — Middle
250
Can you tell about your experience using Apache Kafka in projects?
Junior — Middle
247
245
245
Can you explain the concept of Stream API in Java and how it is used for data processing?
Junior — Middle
244
What steps are necessary to integrate an external Spring Bean into your application?
Junior — Middle
244
Can you list the main areas within the JVM and their functions?
Junior — Middle
244
Who was involved in testing and system analysis on the project?
Senior
244
Are there any offers from other employers yet?
Senior
243
Can you explain what the RetentionPolicy annotation means in Java and how it affects the lifecycle of an annotation?
Junior — Middle
241