Pass4Test에서 출시한   CCAH CCA-410 (Cloudera Certified Administrator for Apache Hadoop CDH4) 덤프 실제시험의 거의 모든 문제를 커버하고 있어 최고의 인기와 사랑을 받고 있습니다. 어느사이트의   CCAH CCA-410 (Cloudera Certified Administrator for Apache Hadoop CDH4) 공부자료도  Pass4Test제품을 대체할수 없습니다.학원등록 필요없이 다른 공부자료 필요없이 덤프에 있는 문제만 완벽하게 공부하신다면   CCAH CCA-410 (Cloudera Certified Administrator for Apache Hadoop CDH4) 시험패스가 어렵지 않고 자격증취득이 쉬워집니다.

NO.1 Which two updates occur when a client application opens a stream to begin a file write on a

cluster running MapReduce v1 (MRv1)?

A. Once the write stream closes on the DataNode, the DataNode immediately initiates a black

report to the NameNode.

B. The change is written to the NameNode disk.

C. The metadata in the RAM on the NameNode is flushed to disk.

D. The metadata in RAM on the NameNode is flushed disk.

E. The metadata in RAM on the NameNode is updated.

F. The change is written to the edits file.

Answer: E,F

NO.2 Which three distcp features can you utilize on a Hadoop cluster?

A. Use distcp to copy files only between two clusters or more. You cannot use distcp to copy data

between directories inside the same cluster.

B. Use distcp to copy HBase table files.

C. Use distcp to copy physical blocks from the source to the target destination in your cluster.

D. Use distcp to copy data between directories inside the same cluster.

E. Use distcp to run an internal MapReduce job to copy files.

Answer: B,D,E

NO.3 For a MapReduce job, on a cluster running MapReduce v1 (MRv1), what's the relationship

between tasks and task templates?

A. There are always at least as many task attempts as there are tasks.

B. There are always at most as many tasks attempts as there are tasks.

C. There are always exactly as many task attempts as there are tasks.

D. The developer sets the number of task attempts on job submission.

Answer: A

NO.4 How does the NameNode know DataNodes are available on a cluster running MapReduce v1

(MRv1)

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

DataNodes.

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

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

respond.

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

respond.

Answer: B

NO.5 What action occurs automatically on a cluster when a DataNode is marked as dead?

A. The NameNode forces re-replication of all the blocks which were stored on the dead DataNode.

B. The next time a client submits job that requires blocks from the dead DataNode, the JobTracker

receives no heart beats from the DataNode. The JobTracker tells the NameNode that the DataNode

is dead, which triggers block re-replication on the cluster.

C. The replication factor of the files which had blocks stored on the dead DataNode is temporarily

reduced, until the dead DataNode is recovered and returned to the cluster.

D. The NameNode informs the client which write the blocks that are no longer available; the client

then re-writes the blocks to a different DataNode.

Answer: A

NO.6 How does HDFS Federation help HDFS Scale horizontally?

A. HDFS Federation improves the resiliency of HDFS in the face of network issues by removing the

NameNode as a single-point-of-failure.

B. HDFS Federation allows the Standby NameNode to automatically resume the services of an active

NameNode.

C. HDFS Federation provides cross-data center (non-local) support for HDFS, allowing a cluster

administrator to split the Block Storage outside the local cluster.

D. HDFS Federation reduces the load on any single NameNode by using the multiple, independent

NameNode to manage individual pars of the filesystem namespace.

Answer: D

NO.7 Choose which best describe a Hadoop cluster's block size storage parameters once you set the

HDFS default block size to 64MB?

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

B. The block size of files in the Cluster will all be multiples of 64MB.

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

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

Answer: D