IT jobs interview questions

Entry-Level and Help Desk Positions
These questions are mostly for Help Desk positions but I wouldn't be surprised if an entry-level candidate was asked any one of these questions. If you don’t know the answer, find it, memorize it and then practice explaining it in your own words.

1. What is the difference between a hub and a switch?
2. What is a network?
3. What is Active Directory?
4. What is TCP/IP and what does it stand for?
5. What is a default gateway?
6. What does DHCP stand for?
7. What is an IP Address?
8. What is the significance of the IP address 255.255.255.255?
9. What are the 3 major classes of an IP network?
10. What is a Class D IP address?
11. What is OSPF?
12. A user is complaining of delays when using the network. What would you do?

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Network Administrator Positions
Some of these questions may also be included in the previous category for Help Desk Technician positions. In either case, they are worth preparing for.

13. What is the difference between layer 2 and layer 3 in the OSI model?
14. What is the difference between a hub, switch, and router?
15. What is a VLAN?
16. What is the difference between TCP and UDP?
17. How do you distinguish a DNS problem from a network problem?
18. What are a runt, Giant, and collision?
19. What is a broadcast storm?
20. What is the purpose of VRRP?
21. What is a VPN?
22. What is a default route?
23. How do you set a default route on an IOS Cisco router?
24. What is a metric?
25. What is a MAC address?
26. What is ARP/RARP?
27. Describe a TCP connection sequence.
28. What is MTU?
29. What other TCP setting can you modify besides MTU to shorten packets?

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System Administration Position
Here are a few more questions that are a little bit more difficult. System Admin’s should know all these answers by heart in addition to the Network Administrator questions.

30. What is the difference between layer 2 and layer 3 devices?
31. What is the subnet for a class C network?
32. Have you configured a NIS server/client before? If so, describe what you did.
33. Have your configured a NFS server?
34. What are RAID 1 and RAID 5?
35. What are the required components of Windows Server 2003 for installing Exchange 2003?
36. What must be done to an AD forest before Exchange can be deployed?
37. What Exchange process is responsible for communication with AD?
38. What connector type would you use to connect to the Internet, and what are the two methods of sending mail over that connector?
39. How would you optimize Exchange 2003 memory usage on Windows Server 2003 with more than 1Gb of memory?
40. What are the standard port numbers for SMTP, POP3, IMAP4, RPC, LDAP and Global Catalogue?
41. Name the process names for the following: System Attendant, Information Store, SMTP/POP/IMAP/OWA.
42. What is the maximum amount of databases that can be hosted on Exchange 2003 Enterprise?
43. What are the disadvantages of circular logging?
44. What is Active Directory schema?
45. What are the domain functional levels in Windows Server 2003?
46. What is the default domain functional level in Windows Server 2003?
47. What are the forest functional levels in Windows Server 2003?
48. What is a global catalogue server?
49. How can we raise domain functional and forest functional levels in Windows Server 2003?
50. What is the default protocol used in directory services?
51. What is IPv6?
52. What are the physical & logical components of ADS?
53. In which domain functional level, we can rename a domain name?
54. What is mult-imaster replication?
55. What is a site?
56. Which is the command used to remove active directory from a domain controller?
57. What is the file that’s responsible for keeping all Active Directory databases?

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THE BLOG OF SOFTWARE DEVELOPMENT COMPANY | Add New Site Collection Administrator in Windows SharePoint Services 3.0 [More]
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General HR Questions
These general questions can be the toughest ones to get through. They might sound easy, but they require a lot of thought and preparation. I would suggest writing down your answers first, then reading them over a few times so that you are comfortable in answering them.

58. Tell us a little bit about yourself.
59. What are your greatest strengths?
60. What are your greatest weaknesses?
61. What do you like about your current job or what did you like about your last job?
62. Give us an example of when you handled a stressful situation.
62. Give us an example of one of the toughest problems you had to face, and how did you deal with it?
63. Why do you think you should get this position?
64. Do you think you are the best person for this job? If so, why?
65. Why did you apply for this position?
66. Why did you apply for a position with our company and what do you know about us?
67. Why should we hire you?
68. Tell us about your short and long term goals?
69. Where do you see yourself five years from now?
70. Please explain, what does customer service mean to you?
71. What does being a team player mean to you?
72. Give us an example of how you handled a conflict with another employee?
73. What are your salary expectations?
74. What would you consider your most important accomplishment?
75. How would you define success?
76. At your last review, what improvements did your manager suggest you make?
77. What would your co-workers say about you?

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