Which process instantiates user code, and executes map and reduce tasks on a cluster running MapReduce v2 (MRv2) on YARN?

Correct Answer for the Question – Which process instantiates user code, and executes map and reduce tasks on a cluster running MapReduce v2 (MRv2) on YARN? is given below Which process instantiates user code, and executes map and reduce tasks on a cluster running MapReduce v2 (MRv2) on YARN? NodeManager ApplicationMaster TaskTracker JobTracker NameNode DataNode ResourceManager … Read more

What happens when you issue the third command?

Correct Answer for the Question – What happens when you issue the third command? is given below Assume you have a file named foo.txt in your local directory. You issue the following three commands:Hadoop fs -mkdir inputHadoop fs -put foo.txt input/foo.txtHadoop fs -put foo.txt inputWhat happens when you issue the third command? The write succeeds, overwriting … Read more

Which Linux commands help you to identify whether swapping is occurring?

Correct Answer for the Question – Which Linux commands help you to identify whether swapping is occurring? is given below You suspect that your NameNode is incorrectly configured, and is swapping memory to disk. Which Linux commands help you to identify whether swapping is occurring? (Select all that apply)Reference: http://www.cyberciti.biz/faq/linux-check-swap-usage-command/ free df memcat top jps vmstat … Read more