Day 3 of prep · 76 days to go
SDE 2 prep, one day at a time.
I’m a software engineer preparing for SDE 2 roles. I practise DSA, low-level design and system design every day, and this is where all of it lives.
The journey
Oct 29 → Jan 15, 2027Current focus
- Machine coding: timed LLD rounds in Java
- System design: working through my HLD question list
- DSA: multi-part interview questions, graphs and DP
By difficulty
Easy · 1Medium · 17Hard · 2
Patterns practiced
All LeetCode problems →Recent blog entries
All entries →Graphs + Java fundamentals
Focus areas: DSA (3 hrs) and Java fundamentals (1 hr). Map of Highest Peak: multi-source BFS from every water cell at height 0; each BFS layer is one higher. Surrounded Regions:…
Graph day: 3 problems
Focus area: DSA only. Spent 2 hours on graphs and solved three problems. Minimum Genetic Mutation: shortest path in an implicit graph, where each gene string is a node and a…