CCA-470 試験問題を無料オンラインアクセス

Identify which two daemons typically run each slave node in a Hadoop cluster running MapReduce v1 (MRv1)

• A.DataNode
• B.TaskTracker
• C.Secondary NameNode
• D.NodeManager
• E.NameNode
• F.JobTracker

Which three distcp features can you utilize on a Hadoop cluster?

• A.Use distcp to copy HBase table files.
• B.Use distcp to copy data between directories inside the same cluster.
• C.Use distcp to copy files only between two clusters or more. You cannot use distcp to copy data between directories inside the same cluster.
• D.Use distcp to run an internal MapReduce job to copy files.
• E.Use distcp to copy physical blocks from the source to the target destination in your cluster.

How must you format the underlying filesystem of your Hadoop cluster's slave nodes running on Linux?

• A.They must be formatted as HDFS
• B.They must be formatted as either ext3 or ext4
• C.They must not be formatted - - HDFS will format the filesystem automatically
• D.They may be formatted in nay Linux filesystem

You configure Hadoop cluster with both MapReduce frameworks, MapReduce v1 (MRv1) and MapReduce v2 (MRv2/YARN). Which two MapReduce (computational) daemons do you need to configure to run on your master nodes?

• A.ResourceManager
• B.JournalNode
• C.ApplicationMaster
• D.NodeManager
• E.JobTracker

Assuming a large properly configured multi-rack Hadoop cluster, which scenario should not result in loss of HDFS data assuming the default replication factor settings?

• A.An entire rack fails.
• B.Seventy percent of DataNodes simultaneously fail.
• C.Ten percent of DataNodes simultaneously fail.
• D.Multiple racks simultaneously fail.
• E.All DataNodes simultaneously fail.