Online Access Free CCA-410 Exam Questions

When planning a hadoop cluster, what general rule governs the hardware requirements between master nodes and slave nodes?

• A.The master nodes require more memory and greater disk capacity then the slave nodes
• B.the master nodes requires less memory and fewer number disk drives than the slave nodes
• C.The master nodes requires more memory and no disk drives
• D.The master and slave nodes should have the same hardware configuration
• E.The master nodes requires more memory but less disk capacity

Which three processes does HDFS High Availability (HA) enable on your cluster?

• A.Automatically 'fail over' between NameNodes if one goes down
• B.Configure unlimited hot standby NameNode.
• C.Write data to two clusters simultaneously
• D.Manually 'fail over' between NameNodes
• E.Shut one NameNode down for maintenance without halting the cluster

How does HDFS Federation help HDFS Scale horizontally?

• A.HDFS Federation allows the Standby NameNode to automatically resume the services of an active NameNode.
• B.HDFS Federation improves the resiliency of HDFS in the face of network issues by removing the NameNode as a single-point-of-failure.
• C.HDFS Federation reduces the load on any single NameNode by using the multiple, independent NameNode to manage individual pars of the filesystem namespace.
• D.HDFS Federation provides cross-data center (non-local) support for HDFS, allowing a cluster administrator to split the Block Storage outside the local cluster.

Your running a hadoop cluster with a name node on the host mynamenode.
What are two ways you can determine available HDFS space in your cluster?

• A.Connect to http://mynamenode:50070/and locate the dfs remaining value
• B.Run hadoop DFSAdmin -spaceQuota and subtract DFS used % from configured capacity
• C.Run hadoop dfsadmin - report and locate the DFS remaming value
• D.Run hadoop fs -du / and locate the dfs remaining value

Your cluster implements hdfs high availability (HA) your two namenodes are named hadoop01 and hadoop02. What occurs when you execute the command:
Sudo -u hdfs haadmin -failover hadoop01 hadoop02

• A.Hadoop02 is fenced, and hadoop01 becomes active namenode
• B.Hadoop02 becomes the standby namenode and hadoop01 becomes the active namenode
• C.Hadoop01 becomes inactive and hadoop02 becomes the active namenode
• D.Hadoop01 is fenced, and hadoop02 becomes the active namenode