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Why does local data storage enable offline functionality even if the app is closed and reopened?

hard📝 Conceptual Q10 of 15
iOS Swift - Local Data Persistence
Why does local data storage enable offline functionality even if the app is closed and reopened?
ABecause internet connection is always required.
BBecause local storage saves data persistently on device storage.
CBecause data is lost when app closes.
DBecause local data is deleted on app restart.
Step-by-Step Solution
Solution:

  1. Step 1: Understand persistence of local storage

    Local storage saves data permanently on device, surviving app restarts.

  2. Step 2: Contrast with volatile memory

    Data in RAM is lost on close, but local storage keeps data safe.

  3. Final Answer:

    Because local storage saves data persistently on device storage. -> Option B

  4. Quick Check:

    Persistent local storage = data survives app restarts [OK]
Quick Trick: Local storage keeps data safe across app restarts [OK]
Common Mistakes:
  • Thinking data is lost on app close
  • Believing internet is always needed
  • Assuming local data deletes on restart

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