// coding-interview-questions
Real coding questions, worked solutions, and the patterns behind them.
6 min read How a server-side request forgery bug reaches the cloud metadata endpoint, why IMDSv2 blocks most of them, and the follow-ups a security interviewer will push on. Read article
8 min read The ownership, async, and lock-free questions that Rust systems rounds at shops like Anduril and Oxide actually ask, and how to reason through them out loud. Read article
6 min read The architecture, clustering, warehouse-sizing, and cost questions Snowflake interviews lean on, with the SQL and the gotchas that separate strong answers. Read article
7 min read The dbt and SQL questions that come up in analytics engineering interviews, and how to reason through the ones built to trip you up. Read article
7 min read The five SOLID principles the way they show up in design interviews: a messy class, the letter it breaks, and the before-and-after that scores. Read article
5 min read The classic n-pairs parentheses problem, why the brute-force filter is a trap, and the pruning rule that keeps backtracking clean. Read article
6 min read Walking Minimum Window Substring from the brute-force baseline to the O(n) sliding window that tracks coverage with a single counter. Read article
6 min read A walkthrough of LeetCode 72, from the recursive prefix idea to the 2D table, its O(n)-space version, and the follow-ups interviewers ask. Read article
5 min read A deep copy of a graph only works if you record each clone the moment you make it, before you ever touch its neighbors. Read article
7 min read House Robber reduces to two running numbers and a two-state machine, and that same shape solves the circular, tree, and stock-cooldown follow-ups. Read article
6 min read Kadane’s algorithm finds the largest contiguous subarray sum in a single pass, and the interview really lives in the follow-ups: all-negative inputs, returning indices, and the product and circular variants. Read article
7 min read Why 3Sum sorts first, where the duplicate skips go, and what interviewers ask once your two-pointer solution compiles. Read article
7 min read The recurring SQL patterns that show up across almost every database and data interview, each with a template query you can adapt. Read article
8 min read Most slow Spark jobs come down to the shuffle, and the interview questions about RDDs, skew, and broadcast joins are really testing whether you understand it. Read article
7 min read A look at the SQL, idempotency, and dimensional modeling questions data engineers get asked now, and what interviewers are really checking. Read article
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