Sriw World of Coding·2d agoCrack AWS Data Engineer Interviews: The Ultimate Q&A Guide | Complete Udemy CoursePrepare for AWS Data Engineer interviews with SQL, Python, PySpark, Airflow, Redshift, EMR and Databricks. Watch our free YouTube tutorial…
InCodeToDeploybySriw World of Coding·Jul 29Pyspark Scenario Based Interview Question : The partitionBy() Trap Nobody Warns You AboutThe Scenario: A data engineer writes a batch pipeline that processes 50 GB of data and saves it to a cloud data lake using…
InT3CHbySriw World of Coding·Jul 27PySpark Scenario Interview QuestionYou write a PySpark query joining two DataFrames on what you believe is a composite key: df1.join(df2, (df1.id == df2.id) & (df1.type ==…A response icon1
InBeyond LocalhostbySriw World of Coding·Jul 26Pyspark Coding Interview QuestionThe Problem: You run an IoT pipeline processing sensor heartbeat logs with columns [sensor_id, timestamp]. Sensors are supposed to ping…
InTowards Data EngineeringbySriw World of Coding·Jul 12Why You Should Never Use dropDuplicates() for This PySpark Interview QuestionOne wrong function choice will cost you the job — here’s the right way to get the latest record per group using Window FunctionsA response icon3
