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Interview Questions asked for System Administrator Position!

As far my 7years journey I have many interviews with many good reknown companies i.e. HP, IBM,Microsoft.
Here is a List of some questions (which i can remember ) asked to me in Either Telephonic or F2F interview:-
1) What is Active Directory?
2) What is Active Directory Database?
3) What is DNS?
4) What are different type of DNS records?
5) What are different type of DND scopes?
6) What you understand from DHCP?
7) How DHCP works?
8) What is the difference between the WINS and DNS?
9) How to Compact Active Directory?
10) How to Defragment Active Directory database? How many types of Defreagment available?
11) What is DHCP? and where is the Database stored?
12) What is Stub Zone?
13) 5 Major Difference between windows 2003 and windows 2008?
14) Port no of DHCP server? - DHCP server listens at 67 and responds at 68.


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