polyedre / pci-exercises

Intro

We created this set of exercises to give you the opportunity to express yourself technically. Do as much as you can in the time you have. Feel free to ask us questions, if any. No worries if you can't make it all by lack of time or understanding of what we're asking. We'll defrief it with you during our next call.

Have fun!

Fork

Fork this repo to your own github repo

Ex. 1 - python

This exercise will be split into multiple smaller ones. For each one you can create files named a.py, b.py and c.py. You maybe resuse the same environment for all sub-exercises

Guidelines:

• Use python version python3.7+.
• Unless specified otherwise you can only use builtin modules.

python - A

Write a script that prints out whatever text input is passed as argument

Example:

$ python a.py ping ping ping
ping ping ping

python - B

Write a script take takes one argument (-t/--target) which can only accept the following values titi, toto, tata. When called with a valid target, the script should print out the target text to stdout (titi, toto or tata). When an invalid target is provided an error message should be printed to stderr

Example:

$ python b.py --target titi
titi

$ python b.py -t tutu
usage: b.py [-h] [-t {titi,toto,tata}]
b.py: error: argument -t/--target: invalid choice: 'tutu' (choose from 'titi', 'toto', 'tata')

python - C

Write a script that creates ascii art equivalent of text passed as argument. For this exercise you may use a 3rd party module.

Example:

$ python c.py 'Hello buddies'
 _   _        _  _          _                 _      _  _
| | | |  ___ | || |  ___   | |__   _   _   __| |  __| |(_)  ___  ___
| |_| | / _ \| || | / _ \  | '_ \ | | | | / _` | / _` || | / _ \/ __|
|  _  ||  __/| || || (_) | | |_) || |_| || (_| || (_| || ||  __/\__ \
|_| |_| \___||_||_| \___/  |_.__/  \__,_| \__,_| \__,_||_| \___||___/

Ex. 2 - docker

In ex2 folder, you will find a app binary.

Can you build very lighweight docker image that contains ONLY app binary, and that execute app by default?

Push your Dockerfile in the ex2 folder.

Ex. 3 - terraform

In ex3 folder, you will find an incomplete openrc file.

You will need to amend the file to configure the correct OS_USERNAME and OS_PASSWORD with the one that we gave to you.

Then, using terraform, can you write a plan to boot a d2-4 on GRA7 region with a floating IP.

Bonus, on that instance, make sure a web server (nginx) is running.

Push your main.tf file in ex3 folder.

Ex. 4 - git

In this repo, there are two branches:

• stein
• queens

Stein contains the following commits:

• 1ff2641 (stein) G
• cf24853 F
• 3fcdfa0 E
• cb8c71a D
• 849ef26 C
• 372c155 B
• edc8ed7 A

Queens contains the following commits:

• 2624c16 (queens) F
• 5e3521b B
• edc8ed7 A

So the common ancestor is A (same commit ID).

B has been cherry-picked from stein to queens, without conflicts.

F has also been cherry-picked but with conflicts (solved, of course).

Exercice

You will need to create two branches:

• merged
• rebased

Merged

Create the merged branch first:

git checkout -b merged origin/queens

Then merge the stein branch into your branch

git merge origin/stein

You will have a conflict to solved.

Solve it, then push your merged branch to your repo.

Rebased

Now create the rebased branch:

git checkout -b rebased origin/queens

Now rebase it on top of stein:

git rebase -i origin/stein

You will have a conflict to solved.

Solve it, then push your rebased branch to your repo.

Check diff

Now check the diff between your two branches merged and rebased.

git diff merged..rebased

Can you explain why you have a diff?

Write down the explanation in ex4 folder (like in a README.md file)