Java

Is it permissible to have a concrete implementation of a method within an interface definition?

Where are string data usually stored in a system?

Junior — Middle

ГазпромбанкEffective Mobile

What methods of optimization do you know for improving the performance of ConcurrentHashMap?

Have you used the sequential method within the Streams API?

Can you explain how memory works in a Java Virtual Machine (JVM)?

Junior — Middle

IT OneRed CollarEffective Mobile+2

What type of method binding is used during method overloading?

What build automation tools have you used in your practice?

Junior — Middle

СБЕРEffective Mobile

What binding mechanism is invoked when a method is overridden in object-oriented programming?

Is it possible to apply two final operations sequentially within a single Stream in Java?

Explain the principle of using Common Table Expressions (CTE) in SQL and their main purpose.

How does call stack cleanup occur in JVM?

What is the difference between using @Controller and @RestController annotations in Spring?

Junior — Middle

Red CollareRaga InfosystemAston+2

What components or modules of Spring have you used in your projects?

Junior — Middle

Effective MobileКонсалтикаСеверсталь-Ифоком

Is it possible to change the return type of a method when overloading it with different parameter sets?

Is it possible to have private methods with specific implementation inside an interface in a programming language?

How are Atomic variables implemented and their integrity ensured during parallel operations?

How is object comparison performed using the equals method when its algorithms are not overridden?

Have you had experience using the parallel method in Stream API for parallel data processing?

What does the StackOverflowError exception mean and in what cases does it occur in a program?