a) Briefly explain the difference between Full Backup and Differential Backup. b) Give TWO reasons why logging is important to the operating system. c) Give ONE reason why logging policy is necessary to be set for an operating system. d) What kind of the logs is generated by klogd ? e) What kind of log rotation approach is adapted in the following scenario? Briefly explain the mechanism. A new SATA hard disk identified as /dev/sdc is added to a Linux system. Give ONE Linux command for each of the following task (f) - (i). f) Partition the new hard disk. g) Create a new ext4 file system on the third partition of the new hard disk. h) Mount the newly created file system to an empty directory named /datadir. i) Unmount the file system in Q4(h). j) To allow the system to mount this file system automatically at each boot, which file should you edit? Give the absolute path of that file. [1 mark]