Discover gists

The repository for the assignment is public and Github does not allow the creation of private forks for public repositories.

The correct way of creating a private frok by duplicating the repo is documented here.

For this assignment the commands are:

Create a bare clone of the repository. (This is temporary and will be removed so just do it wherever.)

git clone --bare git@github.com:usi-systems/easytrace.git

Complete Recent Discord Quest

Note

This no longer works in browser!

Note

This no longer works if you're alone in vc! Somebody else has to join you!

How to use this script:

Accept the quest under User Settings -> Gift Inventory

Chat GPT "DAN" (and other "Jailbreaks")

What to Expect and Tips

• 45-minute systems interview, focus on responding to real world problems with an unhealthy service, such as a web server or database. The interview will start off at a high level troubleshooting a likely scenario, dig deeper to find the cause and some possible solutions for it. The goal is to probe your knowledge of systems at scale and under load, so keep in mind the challenges of the Facebook environment.
• Focus on things such as tooling, memory management and unix process lifecycle.

Systems

More specifically, linux troubleshooting and debugging. Understanding things like memory, io, cpu, shell, memory etc. would be pretty helpful. Knowing how to actually write a unix shell would also be a good idea. What tools might you use to debug something? On another note, this interview will likely push your boundaries of what you know (and how to implement it).

Design/Architecture

Interview is all about taking an ambiguous question of how you might build a system and letting

	<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
	<CodeBlocksConfig version="1">
	<editor>
	<colour_sets>
	<ACTIVE_COLOUR_SET>
	<str>
	<![CDATA[modnokai night shift v2]]>
	</str>
	</ACTIVE_COLOUR_SET>
	<ACTIVE_LANG>

	#!/usr/bin/python
	#!/usr/bin/env python

	import os
	import glob
	import time
	import RPi.GPIO as GPIO
	import sys, getopt
	import decimal

	#!/usr/bin/python

	import RPi.GPIO as GPIO
	import time
	import subprocess, os
	import signal
	GPIO.setmode(GPIO.BCM)
	GPIO.setwarnings(False)
	RearView_Switch = 14 # pin 18
	Brightness_Switch = 15 # pin 16

	#!/bin/bash

	level=$1
	#echo "level given is $level"

	if [ $# != 1 ]; then
	echo "USAGE: $0 brightness_level (0 to 255)"
	exit 1
	fi

	#!/usr/bin/python
	# A quick hack of my button monitor script to monitor headlights and reverse lights to
	# Dim the screen and switch to the reverse camera.
	# I have not tested this...
	# Remember, the switch or opto is switching to ground, so the logic is inverted... 0 = on 1 = off
	# Also, you would run only one of these "Monitor" scripts. you can't be running RearviewMonitor.py AND LightMonitor.py

	import RPi.GPIO as GPIO
	import time
	import subprocess, os

	import UIKit
	import MobileCoreServices.UTCoreTypes

	if #available(iOS 14.1, *) {
	let input = Bundle.main.url(forResource: "IMG_0037", withExtension: "HEIC")!
	let output = FileManager().temporaryDirectory.appendingPathComponent("IMG_0037.GAIN_MAP.BMP")
	let source = CGImageSourceCreateWithURL(input as CFURL, nil)!

	// urn:com:apple:photo:2020:aux:hdrgainmap
	let dataInfo = CGImageSourceCopyAuxiliaryDataInfoAtIndex(source, 0, kCGImageAuxiliaryDataTypeHDRGainMap)! as Dictionary