Exness - 1

• What ’s the difference between LittleEndian and BigEndian, do you remember? go/stdlib-tooling
• What ’s the point of forking the process if Goroutine is much more lightweight? go/concurrency
• Is a green thread a seed or a system thread? go/runtime
• Does Go ’s scheduler work at the level of kernel threads? go/stdlib-tooling
• When Goroutine wakes up after it was blocked, does it migrate to another thread? go/concurrency
• Will each application have its own iteration (of the Go runtime)? Or will there be a common iteration for all applications? go/runtime
• Do you use SyncOnce or init for initialization of variable packages? go/sync
• What is the Sync package for? go/basics
• When does a race condition occur? go/sync
• Can you write competitive code without mutex? go/sync
• Why are atomics faster? go/sync
• Can you build Mutex on Atomic? go/sync
• What is the default value of a channel in Go? go/channels
• What will happen when you write to the nil channel? go/channels
• What will defer println show? go/errors-panic
• What is the execution order of deferred functions? go/errors-panic
• Can you do streaming on gRPC with a regular HTTP client? network/http
• Can you build a REST API from a protofile? network/http
• What is TCP window size? network/tcp-udp
• Do you remember gRPC default window size? network/grpc
• What are window functions (in databases)? sql/query-optimization
• Do you know anything about auto-vacuum (in Postgres)? sql/replication-scaling
• What ’s the difference between partitioning and sharding? sql/schema-design
• Can sharding be done within one database? sql/replication-scaling
• What type of index does Postgres use - B-tree or hash? sql/indexes
• What is a granular index in ClickHouse? nosql-cache/clickhouse
• Have you worked with Redis? nosql-cache/redis
• What is a consistent hash? What is it for? go/basics
• What is 12-factor application? architecture/principles
• What is Liskov substitution principle? architecture/principles
• Is Go an OOP language at all? go/stdlib-tooling
• What ’s the purpose of a mockup? testing/unit-mocks
• Do you remember what NetworkMode is (in Docker)? containers/docker
• Do you use profiling? What profiles do you use? go/perf-profiling
• What metrics do you know about Prometheus? devops/observability
• What ’s in a histogram? devops/observability
• Which percentile is more accurate, 99th or 95th? devops/observability