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I applied via Naukri.com and was interviewed in Dec 2022. There were 4 interview rounds.
Sql queries round. Window functions, grouping, intermediate sql
Spark optimization techniques
Partitioning data to optimize parallelism
Caching frequently used data to avoid recomputation
Using broadcast variables to reduce data shuffling
Avoiding unnecessary transformations
Tuning memory and executor settings
Using efficient data formats like Parquet or ORC
Using appropriate join strategies
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