http://carlos.sjdr.cloud/tags/exercise/ Recent content in Exercise on carlos zansavio Hugo en Sat, 11 Jul 2026 00:00:00 +0000 http://carlos.sjdr.cloud/posts/apache-spark-exercises/ Sat, 11 Jul 2026 00:00:00 +0000 http://carlos.sjdr.cloud/posts/apache-spark-exercises/ <p>You&rsquo;ve read the docs. You can write queries using SparkSQL or PySpark. You&rsquo;re pretty sure you understand how Spark works under the hood. Then an interviewer asks you to actually reason through a shuffle, and that confidence gets shaky fast.</p> <p>Been there.</p> <p>What actually got these concepts to stick for me was working through math problems tied to Spark&rsquo;s internals. You have to understand the mechanics or the numbers don&rsquo;t add up. So I put together a set of exercises built around exactly that.</p>