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Interview questions · medium
What is the difference between cache() and persist() in Spark? When would you use each?
What is the difference between groupByKey and reduceByKey in Spark?
What is the difference between narrow and wide transformations in Apache Spark? Explain with examples.
What is the difference between partitioning and bucketing in Spark, and when would you use bucketing?
Given the data below, explain the results of different types of joins: Inner Join, Left Join, Right Join. Will a schema be created?
How do you handle very large datasets in Spark to ensure scalability and efficiency?
What are the key performance tuning techniques you apply in Spark jobs to improve performance?
What is the command to import data from HDFS to Hive?
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