Golang

What levels of transaction isolation have you set manually in practice?

What will happen first: cancellation signal processing or write completion if they occur simultaneously in a channel?

Can you explain what a hash index is and what role it plays in data search optimization?

What are the typical problems and failures that can occur when executing multiple transactions simultaneously in a system?

Have you had experience implementing or using distributed transactions in your projects?

Can you explain what pessimistic locking is and how it differs from optimistic locking?

Have you used the pessimistic locking mechanism in your projects?

Have you ever used the SELECT FOR UPDATE command in your projects to lock rows during transactions?