Hello Team, Before 2-3 days I had appeared for HDPCD: java exam. Initially there was problem with VM connectivity, but proctor resolved it from his end. I wanted to analyse data set for exam but it was not available on VM. When I tried to do hadoop fs -ls , Its was giving error "Can Not Connect to Name Node: I immediately informed proctor, but he is not ready to help & said he can not help for the exam content. I thought of finishing the coding part first & then check, After creating jar, I again tried to connect to cluster but its in vain, I tried to ssh the name node, I tried to connect to Ambari, Even I tried to run start-all-services.sh but was of no use & giving same error. I informed proctor, multiple times but he was not ready to help & informed me that he will send report to Hortonwork about discussion. Even though I have enough time to test & validate, I could not test & validate my work because of these environment issues.. I had already sent mail to certification alias i.e. certification@hortonworks.com, but still there is no response. Can some one guide me about this Thanks in advance ... View more