Real questions from top companies in Spark/Big Data · hard
Usage of UDFs?
Walk through how you would debug the data ingestion process to identify slow stages.
Walkthrough Spark's architecture, focusing on driver, executors, and DAGs
What are Spark optimizations, and can you explain them?
What is Predicate Pushdown and AQE with Example
What role would Kafka or similar event-driven platforms play in your architecture?
Write a PySpark script to check for missing values and duplicate rows in a DataFrame. How would you ensure data quality before saving it to a storage system?
Write a Spark job to count word occurrences from an S3 dataset.
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