Which action ends access to a file and ensures its data is saved or flushed?

Which action ends access to a file and ensures its data is saved or flushed?

• A. Open file
• B. Read file
• C. Write file
• D. Close file

Answer: (D)

Closing the file is the action that ends your access to it and ensures any written data is actually saved. When you write data, it often goes into an in-memory buffer, and closing flushes that buffer so the data is pushed to the storage medium and the file handle is released. Opening starts access, reading retrieves data, and writing can prepare data for storage, but without closing (or an explicit flush) the final step to guarantee persistence may not occur. So, closing the file both ends access and guarantees that all pending writes are saved.

Closing the file is the action that ends your access to it and ensures any written data is actually saved. When you write data, it often goes into an in-memory buffer, and closing flushes that buffer so the data is pushed to the storage medium and the file handle is released. Opening starts access, reading retrieves data, and writing can prepare data for storage, but without closing (or an explicit flush) the final step to guarantee persistence may not occur. So, closing the file both ends access and guarantees that all pending writes are saved.