Nedumaran Rajagopal neduma

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

Essentially, there's a publisher side (the website displaying the ads), a supply side (the advertisers wanting to display ads), and the client (you). The advertisers might be individual corporations, but they could also be agencies that represent various advertisers or corporations as well.

Traditional advertising was either the publisher or supply side contacting each other to set up a campaign. They could strike a deal like "display my ads on your site for a week for $x" and off you'd go. A contract was signed, you added a banner, and things were fine. You could compare that format to what would be magazines and TV ads: the website was part of a target demographic and you could just buy time as-is. Eventually it evolved when sites got more general (say, news websites or dating websites) where a wide swath of the population could be on the same site. The idea became to target even tighter. The dating websites I used to work on had things like: age, gender, sexual orientation, interests, and so on. We could

Moved to git repository: https://github.com/aliesbelik/load-testing-toolkit

Benchmarking & load testing

Tools to benchmark & load-test your code or services

http/s

apachebench (ab) - Standalone apachebench (ab), Apache HTTP server benchmarking tool. C
httperf - A tool for measuring web server performance. C

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

	#!/usr/bin/env sh
	# cliv - Execute commands using a specific .env and directory
	set -eu

	_err () { printf "%s\n" "$0: Error: $*" ; exit 1 ; }

	HOME="${HOME:-$(getent passwd $(id -u) \| cut -d : -f 6)}"
	[ -d "$HOME/.cliv" ] \|\| mkdir -p "$HOME/.cliv"

	if [ $# -lt 1 ] \|\| [ "$1" = "-h" ] ; then

	#!/usr/bin/python3

	import re
	import sys
	from tabulate import tabulate

	comments_re = re.compile(r'/\.\/')

	in_chain, eof = False, False
	headers, table = [], []

	# Put this function to your .bashrc file.
	# Usage: mv oldfilename
	# If you call mv without the second parameter it will prompt you to edit the filename on command line.
	# Original mv is called when it's called with more than one argument.
	# It's useful when you want to change just a few letters in a long name.
	#
	# Also see:
	# - imv from renameutils
	# - Ctrl-W Ctrl-Y Ctrl-Y (cut last word, paste, paste)

	#Copyright 2021 Fabian Bosler

	# Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation
	# files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,
	# modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom
	# the Software is furnished to do so, subject to the following conditions:

	# The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
	# Software.

	#!/usr/bin/env bash

	set -e # Abort script at first error, when a command exits with non-zero status (except in until or while loops, if-tests, list constructs)
	set -u # Attempt to use undefined variable outputs error message, and forces an exit
	set -x # Similar to verbose mode (-v), but expands commands
	set -o pipefail # Causes a pipeline to return the exit status of the last command in the pipe that returned a non-zero return value.

	DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"

	# end boilerplate from: https://gist.github.com/crizCraig/f42bc250754bed764ada5f95d101dbea

	#!/bin/bash

	#
	# @author: Hernan Garcia <[email protected]>
	# https://gist.github.com/hernandanielg/430f3adb8e297f37ef6f0efb45a51bdc
	#
	# usage: ./delete_iam_user.sh [options] <user>
	# options:
	# -d\|--dry-run dry run mode
	#