@ashutosh bajpai-Sorry to hear that your experience was not good. I would recommend for answers specific to your particular exam, please send email to certification@hortonworks.com ... View more

@Saurab Dahal - As in the other answers the change in hdfs-site.xml will only affect the newly created files with the new replication factor. If you want to change replication factor for already existing files. You can run the hdfs cli commands like below: hdfs dfs -setrep -w 1 /myfile hdfs dfs -setrep -w 1 /mydir Hope this helps ! ... View more

You can simply run hdfs cli commands to delete objects on S3 hdfs dfs -rm -r -f -skipTrash s3a://S3_BUCKET_NAME/S3_PATH This however will only works if you have specified S3 properties (fs.s3a.access.key, fs.s3a.secret.key) in core-site.xml ... View more

@Kareem Amin - Sorry to hear that your experience was not good. There are few below threads related to your experience: https://community.hortonworks.com/questions/33690/hdpcd-exam-network-issues.html#answer-33724 https://community.hortonworks.com/questions/82013/hdpcd-spark-when-can-i-expect-result.html#answer-82024 Also, for answers specific to your particular exam, please send email to certification@hortonworks.com ... View more