Whatsapp System Design: Chat Messaging Systems for Interviews



The Whatsapp system architecture is a common system design interview question. This interview question asks us to select a set of features like sending chat messages, read receipts, group messaging and last seen visibility.

The chat system must be scalable and have other non functional requirements like message ordering, retrial, idempotency, load balancing and image sharing.

“Grokking the System Design Interview” Course:
LOW LEVEL DESIGN: http://educative.io/gaurav-OOD
Use the coupon code “GS-OOD-10” for a 10% discount. It’s valid globally for the first 500 users.

HIGH LEVEL DESIGN: https://www.educative.io/collection/5668639101419520/5649050225344512?affiliate_id=4793322061168640

Check out the other system design videos on the channel here:

References:
https://spectrum.ieee.org/tech-talk/computing/software/how-facebooks-software-engineers-prepare-messenger-for-new-years-eve
http://highscalability.com/blog/2014/2/26/the-whatsapp-architecture-facebook-bought-for-19-billion.html
http://highscalability.com/blog/2014/3/31/how-whatsapp-grew-to-nearly-500-million-users-11000-cores-an.html

2:35 Tinder video – https://youtu.be/tndzLznxq40
3:20 System Design Playlist – https://www.youtube.com/playlist?list=PLMCXHnjXnTnvo6alSjVkgxV-VH6EPyvoX
15:00 Load balancer – https://youtu.be/K0Ta65OqQkY
21:00 Consistent Hashing – https://youtu.be/zaRkONvyGr8
21:55 Message Queues – https://youtu.be/oUJbuFMyBDk
23:05 Messaging idempotency and ordering – https://youtu.be/WzBzYX1aSrU

#SystemDesign #DesignWhatsapp #gkcs

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?1. First C++ Program using Visual Studio 2015 IDE – write, compile, build, run! ?



Write, compiler, build and run your first C++ Program using Visual Studio 2015. You will be building your first “Hello World” program in C++. Technically, you will be building a Win32 Console Application. Learn how to create a “pause” section so your program does not close until you choose it to.
ENHANCED VERSION: https://youtu.be/E-4SvjqChiI
Some of the hardest parts of beginning to program is figuring out how to configure your project and getting that first program running. So dive right in and get to learning. Comment below with your feedback.
My all-time favorite book for C++ programming – https://amzn.to/2FpOA4k

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Building a Java application with TypeScript and React pt1



In “Building a Java application with TypeScript and React” I show you how to build a Java application using Spring boot, React and TypeScript.

Creating a Landing Page with React (P5D88) – Live Coding with Jesse



Project 5 Day 88: Today we will create a landing page for the Admissions department using React and MaterialUI.

See a professional front-end developer at work. Unscripted. Mistakes included.

Next.js 5: https://zeit.co/blog/next5

Project Repo: https://github.com/fus-marcom/franciscan-react

React: https://facebook.github.io/react/

Gitter: https://gitter.im/LiveCodingwithJesseFreeCodeCamp/

Twitter: https://twitter.com/JesseRWeigel
Youtube: https://www.youtube.com/c/JesseWeigel29
Instagram: https://www.instagram.com/jesse.weigel/

Code Editor: Visual Studio Code
VS Code Theme: Seti
Terminal: https://www.iterm2.com/
Project Management: https://trello.com

Learn to code for free and get a developer job: https://www.freecodecamp.org

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Hosting an Ionic Application with Continuous Integration on Netlify



In this video, we walk through how to host an Ionic application on Netlify using GitHub.

#ionic #angular #netlify

– Learn Ionic: https://www.joshmorony.com/building-mobile-apps-with-ionic-2/

– Find me on Twitter: https://twitter.com/joshuamorony

– More Ionic tutorials: https://www.joshmorony.com/blog/

The Truth about app development – how coding has changed in 2020.



Ex-Google TechLead explains why apps and websites are so hard to succeed. Check out http://curiositystream.com/techlead for unlimited access to the world’s top documentaries and non­fiction series, and enter promo code ‘techlead’ for a free 30-day membership.

In today’s era, independent apps and websites have seen a decline. Rather, I think “code” plays its strongest role when holistically integrated with social media. That is, code must be social-media first. For an example of how my web project integrates with my social media presence, check out https://algopro.com/

Please share the video with other people you know, I’d love to get more thoughts here on how you think the landscape of code is changing.

Join me in my new coding interview training program here http://techinterviewpro.com/

And, join ex-Google/ex-Facebook engineers in 60+ whiteboard coding sessions at (20% off now, limited time): https://algopro.com/

» Get my free daily coding interview practice at http://dailyinterviewpro.com/

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How to make an App in Android Studio (Currency Converter)



In the above video, we are making a simple currency converter. I am using Android Studio 1.5.1.

If you have any questions, please leave them in the comments and i will try to answer them as soon a possible. Also if you see something you can help out with, pls. do so

Pls. Like and Subscribe and share with your friends

Tags
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How to make an App
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MAKE GAMES WITHOUT CODE! – Unity 3D Game Kit



Learn how you can use the 3D Game Kit to create game levels without writing any code.

This video is sponsored by Unity.

● Download 3D Game Kit: https://bit.ly/2JNDFp2
● Download 2D Game Kit: https://bit.ly/2K3brTe

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Building a simple mobile app with Flutter



Building cross platform mobile apps can be tricky. This video Google Developer Expert, Faisal Abid will tell you why Flutter is good.
You can follow Faisal here: https://twitter.com/FaisalAbid
Flutter: https://flutter.io/

Follow Macy: https://twitter.com/macykuang

How-to create a Compass App



In this video we are going to develop an Android Compass App.
Compass img: http://www.wlsdevelop.com/materiale/android/compass.png
Link to the post: http://www.wlsdevelop.com/index.php/en/blog?option=com_content&view=article&id=38
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Twitter: https://twitter.com/wlsdevel