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## Level 1 Questions
How would you prove the code is correct?
1. How would you prove the code is correct?
To prove the code is correct I suppose I could set up a test environment
where I could account for all connections and run tests like
ssh connections, dhclient or dig (dns) connections, nmap port
scans, and then ensure the connections I expect from the tests
appear in the program's output.
How would you make this solution better?
2. How would you make this solution better?
I'd improve the solution by making the functions more focused on
specific tasks, improving how I present the interface of each
function to each other to more specifically eliminate type
or value errors. I'd also allot more time to complete the task
since I wasn't able to find enough before the deadline.
Is it possible for this program to miss a connection?
3. Is it possible for this program to miss a connection?
Yes, if the connection is brief enough so as not to last more than 10
seconds and thereby be missed by the most recent read of the
/proc/net/tcp file
If you weren't following these requirements, how would you solve the problem of logging every new connection?
4. If you weren't following these requirements, how would you solve the problem of logging every new connection?
I would likely find a solution that leverages inotify to detect any change to the file and then read it,
rather than polling it every 10 seconds.
## Level 2 Questions
Why did you choose 'x' to write the build automation?
1. Why did you choose 'x' to write the build automation?
I would simply choose bash, as it's what I'm most familiar with and it
can reliably use the go build tools as well as invoke testing
systems like kvm/qemu, docker/podman and the like.
Is there anything else you would test if you had more time?
2. Is there anything else you would test if you had more time?
If I had more time I'd spend it fleshing out my testing as outlined above
and doing a more thorough job of structuring my data in the way
that I've modeled it in my head - the choice of go definitely
consigned me to reading more than writing with the little time
I had. Should have gone with bash I think.
What is the most important tool, script, or technique you have for solving
3. What is the most important tool, script, or technique you have for solving
problems in production? Explain why this tool/script/technique is the most important.
## Level 3 Questions
If you had to deploy this program to hundreds of servers, what would be your
1. If you had to deploy this program to hundreds of servers, what would be your
preferred method and why?
I would use ansible and use git to clone, build, and install the script.
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troubleshoot in the event that I run into issues and
ansible doesn't require a central orchestrator node. It's
also the Infrastructure-as-code tool I'm most familiar with.
What is the hardest technical problem or outage you've had to solve in your
2. What is the hardest technical problem or outage you've had to solve in your
career? Explain what made it so difficult?