Leetcode PACT

PACT: I will practice leetcode problems and study system design for 100 days starting Dec 1, 2025.

Non-Negotiable:

1. Practice problems from <https://neetcode.io
2. Read System Design and the System Design Interview book1 by Alex Xu.
3. Behavioural Interview
   1. Tech Interview handbook

Optional/time-permitting:

• Mojo 🔥 GPU Puzzles

2025-12-01

• binary tree diameter
• Event sourcing. Also brings to mind Streams Hold Truth, Queues Do Work. Event sourcing changes the paradigm from persisting states to persisting events (ie., work already done).
• Caches going wrong:
  • Thundering herd problem
  • Cache pentration ( record missing in upstream db)
  • Cache breakdown. retiring hot key. hot keys make up vast majority of cache hits. 80/20 rule.
  • Cache crash. duh.
• Linux File System layout -Software Engineer interviews: Everything you need to prepare

For tomorrow:

• review the previous doc again.
• Coding interview study plan - what to study and practice based on time left