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What are errors.Is and errors.As used for, and what problem do they solve?

Tell about your experience working in Go — did I understand correctly that you have 6.5 years of experience?

When a slice is re-declared inside a function beyond its capacity — is it allocated on the heap or on the stack?

How did you configure idempotency to prevent duplicate announcements?

You developed a service for publishing and managing ads on Avito. What exactly did you do to make it faster?

What will happen if we add too many elements to a slice inside a function?

How does a slice differ from an array?

What data types can be used as keys for a map? Can an array be used as a key?

What are errors.Is and errors.As, what are they used for, and what problem do they solve?

Which is better to choose for this task: buffered or unbuffered channel? How do they differ?

What is MVCC in PostgreSQL? How does it create row versions?

Can we add an element to a nil slice?