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Rackspace Interviews

www.rackspace.jobs /  HQ: San Antonio, TX

319 Interviews

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Rackspace Interview Questions

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User has lost root password, how do you reset?

5 Answers

init 1, change root password... I missed this one.

"init 1" doesn't always work, if you're not already root some systems will ask you for root password, and if you're not logged into the system ? What always works is to boot of a live CD, mount the file system with /etc, edit the /etc/passwd, /etc/shadow file.

Actually the easiest way to do this is to single the box in run-level 1 then use the standard passwd tools to update the hash. That's far simpler than using a live cd and editing the shadow file. This a network based kvm. is an operation that can be done at the DC or over ipmi or

Can you write the code to generate the Fibonacci sequence?

4 Answers

Define the difference between a hub and a switch

3 Answers

When does DNS use TCP instead of UDP

3 Answers

What are the port number for smtp, ftp and http

2 Answers

There are two directly-connected switches. Assume that they communicate fine on the physical layer. Why can't two hosts with assigned addresses 192.168.100.5/30 and 192.168.100.50/30 communicate with each other? Also assume that network addresses can be used. How would you remedy this by swapping out only ONE of the devices on the network?

3 Answers

The most difficult question was how to deal with teammates who become problematic and how I would deal with them even though I wasn't a manager.

1 Answer

An application has just been updated. New functionality, for some reason is performing far more slowly than existing functionality. Why might this be?

1 Answer

"What drives you?"

1 Answer

Not too difficult, if you are prepared for a behavioral interview

1 Answer
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