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Standard Library
1. How does context.Context propagate cancellation across goroutines and calls?
Level: Expert | Frequency: High
2. Explain how encoding/json marshaling works with struct tags and custom marshalers.
Level: Expert | Frequency: High
3. How does the testing package support table-driven tests and benchmarks?
Level: Expert | Frequency: High
4. How would you implement structured logging with log/slog in a production service?
Level: Expert | Frequency: High
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Standard Library