What would you do if you handed over your code to another team for testing and did not receive a response?
Junior — Middle
294
Java
14621
265
How to correctly implement the hashCode and equals methods in a class?
288
Did your last project involve technologies and solutions typical for high-load systems?
Middle — Middle+
275
What name should I use when addressing you?
Intern — Junior
269
Explain the purpose and features of using the volatile keyword in programming.
Junior — Middle
265
Was the Ashan site disabled or closed?
Junior — Middle
264
What would you do if your message about a task in the corporate chat remained unanswered?
Junior — Middle
261
Who was responsible for the maintenance and support of the distributed data storage system?
Junior — Middle
258
In what situations can data loss occur in Kafka?
Junior — Middle
258
How is exception handling implemented in applications using the Spring Framework?
Junior — Middle
257
public class MoneyTransferService { /** * @param fromAccountId unique identifier of the user transferring funds * @param toAccountId unique identifier of the user receiving funds * @param amount transfer amount. Positive number */ @Transactional public void transferMoney(Long fromAccountId, Long toAccountId, BigDecimal amount) { if (amount.compareTo(BigDecimal.ZERO) <= 0) { throw new RuntimeException("Amount must be +"); } if (fromAccountId.equals(toAccountId)) { throw new RuntimeException("Account can't be the same"); } Long firstId = Math.min(fromAccountId, toAccountId); Long secondId = Math.max(fromAccountId, toAccountId); Account first = accountRepository.findByIdForUpdate(firstId) .orElseThrow(() -> new RuntimeException("Account not found")); Account second = accountRepository.findByIdForUpdate(secondId) .orElseThrow(() -> new RuntimeException("Account not found")); Account from = fromAccountId.equals(firstId) ? first : second; Account to = fromAccountId.equals(firstId) ? second : first; if (from.getBalance().compareTo(amount) < 0) { throw new RuntimeException("Balance is less 0"); } from.setBalance(from.getBalance().subtract(amount)); to.setBalance(from.getBalance().add(amount)); accountRepository.save(to); accountRepository.save(from); } } @Entity @Data public class Account { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Long id; private BigDecimal balance; }
Senior
256
How do HashMap and ConcurrentHashMap differ in Java in terms of functionality and usage in multithreaded segments?
Junior — Middle
256
Where are partitions distributed?
Junior
255
What formula is used to determine the number of brokers (nodes) when designing a fault-tolerant Kafka cluster?
Middle — Middle+
252
What elements or features of the internal structure of HashMap cannot be changed after its creation?
Junior — Middle
250
How to properly modify an object so that it can be used in a HashMap collection?
Junior — Middle
247
What are the main principles of service design to minimize data or resource loss?
Junior — Middle
243
Can you give an example of the idea of dependency inversion in software design?
Junior — Middle
240
How do garbage collection mechanisms determine objects to be destroyed?
240
How is teamwork organized in your team and what processes are used to accomplish tasks?
Junior — Middle
235