CCA-410 · Question #66
Which three file actions can execute as you write a file into HDFS?
The correct answer is C. You can rename the file D. You can delete the file E. You can move the file. CD: When a file is deleted by a user or an application, it is not immediately removed from HDFS. Instead, HDFS first renames it to a file in the /trash directory. The file can be restored quickly as long as it remains in /trash. A file remains in /trash for a configurable…
Question
Which three file actions can execute as you write a file into HDFS?
Options
- AYou can index the file
- BYou can update the files contents
- CYou can rename the file
- DYou can delete the file
- EYou can move the file
How the community answered
(26 responses)- A12% (3)
- B8% (2)
- C81% (21)
Explanation
CD: When a file is deleted by a user or an application, it is not immediately removed from HDFS. Instead, HDFS first renames it to a file in the /trash directory. The file can be restored quickly as long as it remains in /trash. A file remains in /trash for a configurable amount of time. After the expiry of its life in /trash, the NameNode deletes the file from the HDFS namespace. The deletion of a file causes the blocks associated with the file to be freed. Note that there could be an appreciable time delay between the time a file is deleted by a user and the time of the corresponding increase in free space in HDFS. Runs a HDFS filesystem checking utility. COMMAND_OPTION include: Move corrupted files to /lost+found Delete corrupted files.
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