Hi @Chiranjeevi Nimmala Indeed HDP 2.5 Sandbox and Spark2 with Zeppelin are not compatible. Read this Blog article for more infos: https://de.hortonworks.com/blog/try-latest-innovations-apache-spark-apache-zeppelin-hortonworks-2-5-sandbox/ If you don't want to download the newer Sandbox version, try this tutorial: https://community.hortonworks.com/articles/53029/how-to-install-and-run-spark-20-on-hdp-25-sandbox.html ... View more

Hi Yash, the HDPCD: Spark exam runs on a Spark 1.6 cluster. I strongly recommend you to use lecture for this version. You should also write code for 1.6. If you use Spark2 dataframes etc. You aren‘t prepared well enough for the exam! Best regards Jan ... View more