60+ Important Spark and Databricks Interview Questions

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Spark context vs spark session

difference between RDD, Dataframe and DataSet in spark

what is On Heap memory

what is Off Heap memory

what is Garbage Collector

Explain Spark internal architecture

Difference between Spark cluster mode vs Client mode

how spark do memory management

what is driver out of memory exception and how to fix it

what is executor out of memory exception and how to fix it

what are transformation and action in spark

difference between narrow and wide transformation

what is fault tolerence in spark

what is lazy evaluation in spark

can one spark application have multiple spark sessions

what is spark directed acyclic graph (DAG)

what is spark application, job, stages and tasks

how to calculate number of cpu cores required to process data in spark

how to calculate number of executors required to process data in spark

how much each executor memory is required to process data in spark

how to calculate the total memory required to process data in spark

how to setup spark configuration for cluster

managed tables vs external tables

temporary view vs global temporary view

what is materialized view

types of slowy changing dimensions

how to create a dataframe by reading different file format(csv, json, parquet etc)

how to create a dataframe out of a hive table

how to write dataframe

explain the concept of lazy evaluation in spark and its significance

what is predective pushdown in spark

what is sortmergejoin

how can you perform a broadcast join

what is partitioning and bucketing

cache vs presist

storage level of presists

repartition vs coalesce

how to create a new column in table using pyspark

how to remove duplicates in spark

how to fill null values in spark

how can you select specific columns from spark dataframe

how can you rename a column in a spark dataframe

how do you perform a groupby operation in spark

how can you join two spark dataframe

explain the use of StructType and StructField classes in spark with example

what is incremental load? how to implement?

can you discuss the role of structed streaming in spark

what is databricks unit catalog?

what is the difference between with and without unity catalog?

what is the difference with and without catalog

what is RLS and CLS in databricks

what is role based access control

why unity catalog is better than hive metastore

what is different roles in unity catalog

what is medallion architecture

what is delta lake

what is delta table

what are features of delta tables

what is lakehouse architecture

data warehouse vs data lake vs data lakehouse

what is optimize in databricks and what does it do?

explain about z-order function

what is vaccum in databricks

what is autoloader in databricks

what is delta live tables in databricks

types of databricks cluster and their uses?

avinash
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Plz create video on pyspark debugging, unit testing in pyspark

shivamchandan
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Hi, Where can I find explanation of spark as you told in video ? Is there playlist on this channel or private classes ?

rockroll
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Can u share the link of sessions which provides above explanation( in case not private/paid)

pallavikatoch