Which MapReduce v2 (MR2/YARN) daemon is a per-machine slave responsible for launching
application containers and monitoring application resources usage?
What happens if a Mapper on one node goes into an infinite loop while running a MapReduce job?
Your cluster has nodes in seven racks, and you have provided a rack topology script. What is
Hadoop’s block placement policy, assuming a block replication factor of three?
Your cluster Mode size is set to 128MB. A client application (client application A) is writing a
500MB file to HDFS. After client application A has written 300MB of data, another client (client
application B) attempts to read the file. What is the effect of a second client requesting a file during
In HDFS, you view a file with rw-r–r– set as its permissions. What does this tell you about the file?
How does the NameNode know DataNodes are available on a cluster running MapReduce v1
Which three distcp features can you utilize on a Hadoop cluster?
What action occurs automatically on a cluster when a DataNode is marked as dead?
For a MapReduce job, on a cluster running MapReduce v1 (MRv1), what’s the relationship
between tasks and task templates?
Which two updates occur when a client application opens a stream to begin a file write on a cluster
running MapReduce v1 (MRv1)?