Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH) - CCA-470무료 덤프문제 풀어보기

A. Automatically configure permissions for log files at $MAPPED_LOG_DIR/userlogs

B. Creates users for hdfs and mapreduce to facilitate role assignment.

C. Creates and configures you kdc with default cluster values.

D. Creates a set of pre-configured Kerberos keytab files and their permissions.

E. Creates directories for temp, hdfs, and mapreduce with correct permissions.

A. ResourceManager

B. JournalNode

C. JobTracker

D. NodeManager

E. ApplicationMaster

A. Each slave node runs a TaskTracker, but only a fraction of the slave nodes run DataNode daemons.

B. Each slave node either runs a TaskTracker or a DataNode daemon, but not both.

C. Each slave node runs a JobTracker and a DataNode daemon.

D. Each slave node runs a DataNode daemon, but only a fraction of the slave nodes run TaskTrackers.

E. Each slave node runs a TaskTracker and a DataNode daemon.

A. Increase the value of dfs.number.of.nodes in hdfs-site.xml.

B. Halt and resubmit any running MapReduce jobs to guarantee correctness.

C. Restart the NameNode daemon.

D. Add a new entry to /etc/slavenodes on the NameNode host.

E. add the new node's DNS name to the conf/slaves file on the master node.

A. The block size of files in the cluster will all be the exactly 64MB.

B. The block size of files in the duster will all at least be 64MB.

C. The block size of files in the cluster can be determined as the block is written.

D. The block size of files in the Cluster will all be multiples of 64M

A. Half the number of the maximum number of Reduce tasks which can run on the cluster as a whole.

B. The maximum number of Map tasks which can run on the cluster as a whole.

C. Half the number of the maximum number of Reduce tasks which can run simultaneously on an individual node.

D. The same value on each slave node.

E. The maximum number of Map tasks can run simultaneously on an individual node.

A. After a period of time, the JobTracker will restart the TaskTracker on the node on which the map task is running

B. The Mapper will run indefinitely; the TaskTracker must be restarted to kill it

C. The job will immediately fail.

D. After a period of time, the TaskTracker will kill the Map Task.

A. DataNodes heartbeat in the master on a regular basis.

B. The NameNode broadcasts a heartbeat on the network on a regular basis, and DataNodes respond.

C. The NameNode send a broadcast across the network when it first starts, and DataNodes respond.

D. DataNodes listed in the dfs.hosts file. The NameNode uses as the definitive list of available DataNodes.

A. The client queries the NameNode for the locations of the block, and reads from the first location in the list of receives.

B. The client queries the NameNode for the locations of the block, and reads from a random location in the list it receives to eliminate network I/O loads by balancing which nodes it retrieves data from at any given time.

C. The client queries the NameNode and then retrieves the block from the nearest DataNode to the client and then passes that block back to the client.

D. The client queries the NameNode for the locations of the block, and reads all three copies. The first copy to complete transfer to the client is the one the client reads as part of Hadoop's execution framework.