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Site coordinator Interview Questions

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What will you hope to accomplish in your first 90 days on the job?

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Get to know the staff, visit each site under the district's management, learn the policies and procedures of the district and my department, ask many questions but don't make many suggestions.

Do you have experience working with and identifying various valves, etc.?

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There were two and they both happened during the live-debugging portion of the interview. All of the live debugging questions revolved around a simple website that had something broken in it. You were to fix the brokenness to be able to move on to the next page. In total there were 4 questions, each getting progressively more difficult to debug. The first question was a simple permissions problem on a file being requested by the client. The ownership of the file (a blank text file) was too restrictive, so it was raising an error. You could verify this in the apache web logs. The second error was due to a permission problem too, however this time the file was hidden in a sub directory of the main web site. You could only determine this by looking at the apache configuration file to see that the shtml file was located somewhere else. After that, change the permissions to fix. The third was a head scratcher. The filename in question was raising a 500 error and showing urlencoded characters in the filename in the web log. Looking at the name of the file on disk though, showed nothing out of the ordinary. It turns out that the unicode representations for the characters in the file name are printed in the terminal as english ascii characters. The only way you can tell that this is the case is to open the file and do a search for the filename itself and see if it matches. For example, if the correct filename is called "challenge1.shtml" you can search for that exact string but NOT find the unicode version of it. Once you find the incorrect file name, delete it and type the correct file name (in this case "challenge3.shtml" into the file and the page works. The final question was a segfault occurring in apache. It resulted in no information being returned to the client. You could see this occurring in the apache web logs as well as the Chrome tools. The apache web logs noted that a core file was dumped. This challenge required that you know a little bit about gdb and C programming. Basically, you need to run the core dump through gdb. gdb /path/to/apache /path/to/core/dump It will spew out a lot of stuff. In particular, it mentions that there is something happening in an apache module; mod_rewrite or something...it doesnt really matter. The output also points to the C source file for that module which is, conveniently on disk. Open that file in vi and jump to the line number mentioned in the gdb output (line 1861 or something). There you will see that if the filename matches challenge4.shtml to SIGSEGV; there's your smoke gun. They dont ask you to fix the final challenge, only to explain what the strstr is doing. The error in question basically looks like this if (strstr($r->filename, "challenge4.shtml") != NULL) { SIGSEGV } Just point out to them that, yeah, it's segfaulting when I ask for that file.

11 Answers

What's 2^32 ?

6 Answers

You need to distribute a terabyte of data from a single server to 10,000 nodes, and then keep that data up to date. It takes several hours to copy the data just to one server. How would you do this so that it didn't take 20,000 hours to update all the servers? Also, how would you make sure that the file wasn't corrupted during the copy?

6 Answers

Are you ok with making $10.00 to $11.00 per hour?

5 Answers

Find all pairs of 3 in an array that add to n.

5 Answers

How long have you been doing security?

4 Answers

Given a string, return true if after jumbling/rearranging the characters of the string will it be a palindrome. and false if not. eg: given string "evlel", it can be rearranged to "level" and thus it is a palindrome, and return true. eg: 1234 cannot be rearranged to become a palindrome hence false.

4 Answers

What happens when I type "ps" into a UNIX prompt?

5 Answers
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