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🔗 Combine: iOS interview questions

1. What is Combine and its basic entities? Middle PRO
2. PassthroughSubject vs CurrentValueSubject? Middle PRO
3. What does @Published do? Middle PRO
4. How do you manage subscription memory (AnyCancellable)? Middle PRO
5. map, flatMap, combineLatest — what do they do? Middle PRO
6. What is a Scheduler and the receive(on:)/subscribe(on:) operators? Senior PRO
7. Combine vs async/await — which to choose? Middle PRO
8. What is backpressure/demand in Combine? Senior PRO
9. How do errors work in Combine: Failure, catch, retry, and why does the stream die? Middle PRO
10. Debounced search in Combine: debounce, removeDuplicates, switchToLatest Middle PRO
11. Cold and hot publishers: share, multicast and Future — what runs how many times? Senior PRO
12. How do you test Combine pipelines? Middle PRO
13. How do you bridge Combine and async/await: .values, Future from async, and AsyncStream? Senior PRO