Problem Solving

ps is a collection of various computing problems and their corresponding solutions that I could think of. The problems range in various categories such as design, algorithms, performance optimizations, and more.

Feel free to add a Github issue for any discrepancy, typo, alternatives, or a different solution that I might not have considered. Also feel free to add issues for problems that you would like me to work upon - though it may take me a few days to research and jot my notes here.

If you wish to contribute please read the guidelines.

Dedicated to all the friends who inspired me to learn and experiment.

Notes

Algorithms

• Fastest sorting of bounded integers (huge arrays) (Nov 2016)
• Fastest way to merge multiple integer sets (Nov 2016)
• Fastest way to find duplicates in multiple integer sets (Nov 2016)

Data Structures

• Discussion on how finding duplicates in integer arrays leads to Bloom Filters (Nov 2016)

Design

• Find degrees of separation in a social graph (Nov 2016)
• Design a stateless user-session mechanism (Dec 2016)
• Design a rate-limited web-scraper (Dec 2016)
• Design a Content Delivert Network, CDN (Oct 2017)
• Design a simple MongoDB clone (Dec 2018)

Java Virtual Machine

• Testing for concurrency in Java (Oct 2017)
• Java memory allocation in stack and heap (Oct 2017)

Others

• Stop multiple form submission in web requests - also called Replay Attack (Dec 2016)

Draft notes/Backburner

Problems I want to jot my thoughts and notes on:

• How to find the top-k IPs hitting a service
• Design a scalable user authentication system
• Design a shopping cart
• Design a notification system
• Design a CRON scheduler
• Design an object-pool or a connection-pool
• Design an email-delivery system like Mailchimp
• Design a simlpe S3 clone
• Build a simple Redis clone

License

MIT License

ps - Problem Solving
Copyright (c) 2016-2018, Sandeep Gupta

	https://github.com/sangupta/ps

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