sys-design

System design notes.

Core software and systems engineering concepts

Easy

• Describe DNS
• Describe HTTP
• Describe SSH
• Describe FTP
• Explain object-oriented programming
• Explain recursion in programming
• Explain the C programming language
• Explain the OSI model
• Explain Public Key Infrastructure

Medium

• Design a database
• Describe DHCP
• Describe the boot process of an x86 Linux machine
• Describe the process from typing an address to finishing a page load
• Design a message queue
• Design a scalable HTTP endpoint monitor
• Explain E-Mail

Hard

• Design a Twitter clone
• Design a distributed OS
• Design a hypervisor
• Design a distributed database

Specialty

Cryptocurrency

• Explain Bitcoin
• Design a zero-trust distributed smart-contracts system

Security

• Explain iptables
• Design a RAT (Remote-Access Trojan)

Databases and storage

• Design a filesystem
• Design a multi-paradigm database

Software

• Explain the differences between musl and the GNU Standard library

OS - Windows

• Describe SMB
• Explain DirectX

OS - Linux and Unix

• Explain the design principles behind Unix
• Explain the POSIX standard
• Describe NFS
• Explain Btrfs
• Explain ext4