What are the languages supported by Apache Spark and which is the most popular one?
Apache Spark supports the accompanying four languages: Scala, Java, Python and R. Among these languages, Scala and Python have intuitive shells for Spark. The Scala shell can be gotten to through ./canister/start shell and the Python shell through ./receptacle/pyspark. Scala is the most utilized among them since Spark is composed in Scala and it is the most prominently utilized for Spark.
What are the multiple data sources supported by Spark SQL?
Apache Spark SQL is a popular ecosystem or interfaces to work with structured or semi-structured data. The multiple data sources supported by Spark SQL includethe text file, JSON file, Parquet file etc. more interview questions here