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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

strategy	server_net	server_port	isp	url_scheme	exit_code	img	error
$key	Digital Ocean	443	Bee Line Cable	http	0	✅
$key	Digital Ocean	443	Bee Line Cable	https	0	✅
$key	Digital Ocean	443	MTS PJSC	http	28	❌	curl: (28) Operation timed out after 10006 milliseconds with 0 bytes received
$key	Digital Ocean	443	MTS PJSC	https	28	❌	curl: (28) Connection timed out after 10005 milliseconds
$key	Digital Ocean	443	PJSC MegaFon	http	0	✅
$key	Digital Ocean	443	PJSC MegaFon	https	56	❌	curl: (56) Failure when receiving data from the peer
$key	Digital Ocean	443	Tele2 Russia	http	0	✅
$key	Digital Ocean	443	Tele2 Russia	https	0	✅
$key	Digital Ocean	5555	Bee Line Cable	http	0	✅

Name	ShortName	ModeAndPID	Equation	Min Value	Max Value	Units	Header	startDiagnostic	stopDiagnostic	scale	minimumRefreshDelayMillis
[FORD]Coolant temperature(From TCM)	Coolant	0x0105	A-40	0	120	°C	TCM			1	0
[FORD]Engine Oil Temp	EOT	0x221310	(((A*256)+B)/100)-40	0	300	°C	Auto			1	0
Boost Pressure	BOOST	0x22f470	((D*256+E)/32-[33])/100	-0.5	1.8	bar	7E0			1	0
Boost Pressure Desired	BOOST DSD	0x22f470	((B*256+C)/32-[33])/100	-0.5	1.8	bar	7E0			1	0
Brake Fluid Pressure	BFP	0x22280a	(A256+B)100/128	0	65535	kPa	7E0			1	0
Brake Switch	BRAKE SW	0x22da05	{A:7}	0	1	ON/OFF	726			1	0
Charge Air Cooler Temperature	CACT	0x22f477	C-40	-40	100	°C	7E0			1	0
Coupling Solenoid Duty Cycle	CUP SOL	0x221e7a	A*100/255	0	100	%	761			1	0
Distance from Bumper to Target	DIST BMP TGT	0x22d901	B/4	0	16	m	793			1	0

Improve Fonts

Newest

Make your Arch fonts beautiful easily! This is what I do when I install Arch Linux to improve the fonts.

You may consider the following settings to improve your fonts for system-wide usage without installing a patched font library packages (eg. Infinality):

Install some fonts, for example:
sudo pacman -S ttf-dejavu ttf-liberation noto-fonts

	# http://www.rodsbooks.com/linux-uefi/
	# 1. Install Linux normally
	# 2. Boot from Linux live usb drive
	# 3. Most likely /dev/sda1 but it can be something else:
	mount /dev/sda1 /mnt
	mkdir -p /mnt/EFI/Microsoft/Boot
	# 5. Depending on if it is ubuntu, centos or any other distro:
	cp /mnt/EFI/centos/grubx64.efi /mnt/EFI/Microsoft/Boot/bootmgfw.efi
	# I don't remember but I think it was like this.
	7 efibootmgr --create --label "Windows Boot Manager" --loader "\EFI\Microsoft\Boot\bootmgfw.efi"

	function start() { main(); }

	// CONFIGURE BELOW ------------------------------------------------

	const Test = true;
	const TestFn = events => {
	const testEvent = events[0];

	console.log(testEvent);
	const response = updateEvent(testEvent);

	Note for me to remember how to set Android Home on Mac

	Open Terminal and type in..
	nano ~/.bash_profile
	Add the below paths
	The path should be where your android installation is located
	export ANDROID_HOME=/Users/username/Library/Android/sdk
	export PATH=${PATH}:$ANDROID_HOME/tools:$ANDROID_HOME/platform-tools
	Save file and type in terminal...
	source ~/.bash_profile

	#!/usr/bin/env bash
	# exit on error
	set -o errexit

	STORAGE_DIR=/opt/render/project/.render

	if [[ ! -d $STORAGE_DIR/chrome ]]; then
	echo "...Downloading Chrome"
	mkdir -p $STORAGE_DIR/chrome
	cd $STORAGE_DIR/chrome

	function extractAndDownloadAllChapters() {
	// Find all containers that hold chapter text
	const chapterContainers = document.querySelectorAll('.cha-words');

	// Initialize an array to hold all chapter texts
	let allChaptersText = [];

	// Iterate over each chapter container
	chapterContainers.forEach(container => {
	// Get all paragraph elements within the container