Small

In what cases would you raise the isolation level? When to use Serializable?

What does the repository layer see?

What are the differences between the types of channels in Go?

How are the models between layers organized?

Tell me about pessimistic and optimistic locking

How does an interface differ from Any?

How to make a string validator not longer than 250 characters?

How can the problem of query degradation for write and read in a single table with an index be solved by scaling the database? Do methods like sharding and partitioning help?

What can you tell about map in Go?

Have you worked with replication? What types of replication exist?

Why not always use arrays instead of slices?

When are stream requests in gRPC better than single requests?