Live coding: how to deduplicate addresses in a list to call unique addresses using map.
Middle+
321
Golang
8397
379
Do goroutines work in parallel or concurrently?
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237
Live coding: a task on goroutines — concurrent access to shared data, race condition, solution via mutex. The difference between sync.Mutex and sync.RWMutex.
Middle+
227
Live coding: semaphore — how it works and implementation based on a buffered channel.
Middle+
223
Live coding: add a timeout to a function — if execution exceeds 1 second, return an error. Use select, time.After, context.
Middle+
223
Tell me about the goroutine scheduler in Go — the GMP model, what functions does it perform?
Middle+
212
Tell me about the transaction isolation levels in PostgreSQL and what anomalies they address.
Middle+
199
What is ACID? Describe each property.
Middle+
197
What is a context in Go, how is it used, what is it for, and what types does it have?
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191
Development tools: working with AI assistants (Cursor and others), testing approach (unit, integration tests).
Middle+
185
What is CQRS?
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178
What are Clean Architecture and DDD? Have you worked with them?
Middle+
169
Tell me about SELECT FOR UPDATE — what is it used for and how does it work?
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167
Architectural challenge: how to reliably send an event to Kafka upon user registration in a microservices architecture (user service + notification service), considering Kafka is an asynchronous channel?
Middle+
162
Tell me about indexes in PostgreSQL — what types are there, composite indexes, and the order of columns.
Middle+
156
What is graceful shutdown and how does it work in Go?
Middle+
137