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Real questions from top companies
A task intermittently fails due to external API limitations. How would you configure Airflow retries and alerts to manage this situation efficiently?
Accumulator and Broadcast Variables - explain
Accumulators - use as shared variable for write-only operations
Adaptive Query Execution (AQE): Discuss how AQE optimizes query execution in Spark dynamically based on runtime stats.
After cleaning, how would you store the transformed data into Delta Lake?
Alternatives to the Medallion Architecture
Apache Spark Architecture - RDD, DAG, cluster manager, driver node, worker node
Apache Spark Fundamentals - discuss
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