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3,348 it support engineer interview questions shared by candidates

Explain the difference between TCP and UDP. How do you troubleshoot a PC that won’t boot? What steps would you take if a user reports slow network performance? Describe the process of joining a computer to a domain. What is DNS and why is it important? How do you handle a printer that is not responding on the network? Explain the difference between Active Directory and LDAP. What is the purpose of Group Policy in Windows environments? How do you reset a forgotten Windows password? What is the difference between RAID 0, RAID 1, and RAID 5?
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IT Engineer

Interviewed at TE Connectivity

4★
Dec 10, 2025

Explain the difference between TCP and UDP. How do you troubleshoot a PC that won’t boot? What steps would you take if a user reports slow network performance? Describe the process of joining a computer to a domain. What is DNS and why is it important? How do you handle a printer that is not responding on the network? Explain the difference between Active Directory and LDAP. What is the purpose of Group Policy in Windows environments? How do you reset a forgotten Windows password? What is the difference between RAID 0, RAID 1, and RAID 5?

Joke of an interview process, or atleast very easy. This may have been since the position was in IT and not Engineering, although the position was application development. They take extremely long, and seem to drag the process out substantially. My first interview was way back in October 2013, and I had not even been invited onsite by January 2014 time frame. Its too bad because Cisco was a company I always wanted to work for, but the speed of the interview process was a huge turnoff. I decided to accept a better role at a company that moved faster on me as a candidate. My advice would be too have Cisco maybe as a last resort in the interview process. Also, the fact that the interviews were so simple may indicate the level/challenge of work you will be doing if hired. Most technical interviews should atleast be somewhat challenging, this one was not at all.
avatar

Software Engineer IT

Interviewed at Cisco

4.1★
Feb 19, 2014

Joke of an interview process, or atleast very easy. This may have been since the position was in IT and not Engineering, although the position was application development. They take extremely long, and seem to drag the process out substantially. My first interview was way back in October 2013, and I had not even been invited onsite by January 2014 time frame. Its too bad because Cisco was a company I always wanted to work for, but the speed of the interview process was a huge turnoff. I decided to accept a better role at a company that moved faster on me as a candidate. My advice would be too have Cisco maybe as a last resort in the interview process. Also, the fact that the interviews were so simple may indicate the level/challenge of work you will be doing if hired. Most technical interviews should atleast be somewhat challenging, this one was not at all.

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