We assume in this section that you :
- •  Have some experience working with a relational DB ( like MySQL ).
- •  Have a basic idea about NoSQL DBs.
- •  Understand the basics of the following :Â
- - Â Concurrency :Â Do you understand threads, deadlock, and starvation? What happens when multiple processes / threads are trying to modify the same data? A basic understanding of read and write locks.
- - Â Networking :Â Do you roughly understand basic networking protocols like TCP and UDP? Do you understand the role of switches and routers?
- -  File systems : You should understand the systems you’re building upon. Do you know roughly how an OS, file system, and database work? Do you know about the various levels of caching in a modern OS?
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