How many memory layers are in the shared pool? How do you find out from the RMAN catalog if a particular archive log has been backed-up? How can you tell how much space is left on a given file system and how much space each of the file system’s subdirectories take-up? Define the SGA and [...]

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Job Scheduling; mainly crontab, at, batch command Backup stetegy; incremental, full system back up; diff between tar & ufsdump diff between hard link & softlink How to list only the directories inside a directory (Ans. ls -l|grep “^d”) RAID levels; pros & cons of diffrent levels; what is RAID 1+0 How to recover a system [...]

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On a fresh install, why does Apache have three config files – srm.conf, access.conf and httpd.conf? – The first two are remnants from the NCSA times, and generally you should be ok if you delete the first two, and stick with httpd.conf. What’s the command to stop Apache? – kill the specific process that httpd [...]

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What’s in the file /etc/ttys? – Configuration for virtual consoles for the startup. By default FreeBSD has 8 virtual consoles. You’re told that the permissions of a file are 645. Quick, how do you calculate what it means? – The permissions value are always 4 for read, 2 for write, 1 for execute. The three [...]

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