Part 2.

In part 1, we learned about common topics in system design interviews. We will now go over a series of sample system design interview questions. In each question, we apply the concepts we learned in part 1 as well as introducing concepts relevant to the specific question.

We begin with chapter 7 on how to design a system like Craigslist, a system that is optimized for simplicity.

Chapters 8–10 discuss designs of systems that are themselves common components of many other systems.

Chapter 11 discusses an autocomplete/typeahead service, a typical system that continuously ingests and processes large amounts of data into a few megabytes data structure that users query for a specific purpose.

Chapter 12 discusses an image-sharing service. Sharing and interacting with images and video are basic functionalities in virtually every social application, and a common interview topic. This leads us to the topic of chapter 13, where we discuss a Content Distribution Network (CDN), a system that is commonly used to cost-efficiently serve static content like images and videos to a global audience.

Chapter 14 discusses a text messaging app, a system that delivers messages sent from many users to many other users and should not accidentally deliver duplicate messages.