VISA | Senior Data Engineer | Bangalore | Rejected
Company: VISA · Role: Senior Data Engineer · Location: Bangalore · Mode: Online · Difficulty: Medium hard · Result: Rejected
By Target Trek Community ·
Overview
Round 1: Hadoop basics ( Rack awareness, replication , namenode vs data node , hdfs commands , how to replace a file in hdfs , how to copy from local , remove files without going to traash, what happens if one block is lost) Hive → We have 10k records in a partition we got an update of 200 records , how will you update there is no timestamp column for de duplication , write sql. Spark basics , udfs etc..,
Round 2:
DSA simple python on hashmap & lists Questions on spark optimizations , Partitioning va bickering If you have to ingest a csv file what are all steps you will take ( from source till partitioning on destination )
Round 3: Project discussions & Behavioural questions Veridct: Rejected. They liked my profile but due to compensation ask they didn't offer me.