1. Add, remove and change users- (topology configuration )
2. Data backup and restore
3. Frequent occured problems and trouble shoot
4. Internetworking with other systems and TCP/IP
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plus

* * SOFT SKILLS * *

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I just guessed. Take it as reference only. By the way, follow-up
after interview is 10,000 times more important than we
usually assume.

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Good Luck!