Coding prefix sum
Subarray Sum Equals K
LC 560. Prefix frequency map. Call out why sliding window fails with negatives.
Week 1Tuesday 8 SeptemberHashing
Day 4: Hash maps and prefix sums
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Coding hash set
Longest Consecutive Sequence
LC 128. Only start a run at the head of a sequence. O(n) claim must be earned.
System design consistency
CAP in one minute
What you actually give up in a partition. Avoid the textbook slogan.
System design consistency
Strong vs eventual consistency
Read-your-writes, session, bounded staleness. Pick one product example each.