Embedded interview questions

UpdateSystem.txt

Update System

In any scripting language, write a script to update an embedded system.
Your embedded system's specifications are completely up to you. Please
write down any important details about it.

The script should accept two parameters:
	- url to get the blob from
	- md5 of the blob

The update mechanism itself is up to you -- pick out anything you've seen
used before. If you don't have one in mind, feel free to assume that we
are writing the downloaded image directly to NAND using nandwrite().

The script (and system as a whole) should have some error handling and 
should try to be robust in handling network failures or user error (i.e.
pulling the power plug).

WebsiteChecker.txt

Website Checker

Write a C program which accepts two command line parameters: "url" and "command".

When invoked, the program should perform an HTTP Get on the given "url". If the
status code in the response is `200`, the program should call the given "command".

The program should have the following return values:
	0: got `200` on Get to "url", "command" was successfully called
	5: did not get `200` from "url"
	6: error when calling "command"

You use any online resource for reference, and any external libraries, if
needed.

The program must:
	- compile and run on this machine
	- accept the parameters and return the values listed above
	- be committed to a new Git repository
	- use `make`, and have a Makefile (doesn't need to be complex)

The program should, in a minimal way:
	- perform some kind of logging
	- have some kind of testing

Example:
	> make
	> ./yourProgramName "example.com" "echo 'Hello, world!'"
	Hello, world!
	> echo $?
	0
	> ./yourProgramName "BadAddress.badTLD" "echo 'Hello, world!'"
	Warning: could not reach "BadAddress.badTLD"
	> echo $?
	5
	> git status
	On branch master
	nothing to commit, working directory clean