danielnegri

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

danielnegri

// Place your settings in this file to overwrite the default settings
{
    "workbench.iconTheme": "material-icon-theme",
    "files.trimTrailingWhitespace": true,
    "files.insertFinalNewline": true,
    "editor.fontFamily": "JetBrains Mono, Consolas, 'Courier New', monospace",
    "editor.fontSize": 14,
    "editor.fontWeight":  "300",
    "editor.lineHeight":  24,
    "editor.letterSpacing":  0.5,

danielnegri

no-large-media: behind-the-scene false
no-scripting: estadao.com.br true
no-scripting: folha.com.br true
no-scripting: uol.com.br true
no-scripting: www.nytimes.com true
behind-the-scene * * noop
behind-the-scene * 1p-script noop
behind-the-scene * 3p noop
behind-the-scene * 3p-frame noop
behind-the-scene * 3p-script noop

danielnegri

NOTE

A blog post with more updated info then this has been posted here

Preferences

All preferences for the DNS-over-HTTPS functionality in Firefox are located under the "network.trr" prefix (TRR == Trusted Recursive Resolver). The support for these are targeted for shipping in release Firefox 62.

network.trr.mode

set which resolver mode you want.

danielnegri

# Output to a jpeg file
set terminal jpeg size 1280,720

# Set the aspect ratio of the graph
set size 1, 1

# The file to write to
set output "timeseries.jpg"

# The graph title

danielnegri

## Consumer Throughput: Single consumer thread, no compression
## Consumer Throughput: 3 consumer thread, no compression

bin/kafka-consumer-perf-test.sh --topic benchmark-3-3-none \
--zookeeper kafka-zk-1:2181,kafka-zk-2:2181,kafka-zk-3:2181 \
--messages 15000000 \
--threads 1

danielnegri

// Place your settings in this file to overwrite the default settings
{
    "terminal.integrated.shellArgs.osx": [
        "-l"
    ]
,
"window.zoomLevel": 0,
"workbench.iconTheme": "material-icon-theme",
"files.trimTrailingWhitespace": true,
"files.insertFinalNewline": true,

danielnegri

#System Files
*~
.DS_Store
Thumbs.db

# NodeJS
npm-debug.log
node_modules/
bower_components/

danielnegri

[user]
	name = Username
	email = user@email.com

[color]
    diff = auto
    status = auto
    branch = auto
    interactive = auto
    ui = auto

danielnegri

upload(files) {
  const config = {
    onUploadProgress: function(progressEvent) {
      var percentCompleted = Math.round( (progressEvent.loaded * 100) / progressEvent.total )
      console.log(percentCompleted)
    }
  }

  let data = new FormData()
  data.append('file', files[0])