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Rackspace Interviews

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

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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 and 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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