최신Cloudera Certified Administrator for Apache Hadoop CDH4 - CCA-410무료샘플문제

A. NodeManager

B. TaskTracker

C. ApplicationMasterService

D. ResourceManager

E. ApplicationMaster

F. JobTracker

A. The HDFS cluster is in the safe mode.

B. Your cluster has lost all HDFS data which had blocks stored on the dead DataNode.

C. The DataNode JVM on one host is not active.

D. One physical host crashed.

A. RAID 5

B. RAID 1+0

C. JBOD

D. RAID 10

A. The change is written to the edits file.

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

C. Once the write stream closes on the DataNode, the DataNode immediately initiates a black report to the NameNode.

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

E. The change is written to the NameNode disk.

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

A. Unlimited. HDFS High Availability (HA) is designed to overcome limitations on the number of NameNodes you can deploy.

B. One active NameNode and one Standby NameNode

C. Two active NameNodes and two Standby NameNodes

D. Two active NameNodes and one Standby NameNode

A. Client application on B can read the 300MB that has been written so far.

B. Client application B returns an error

C. Application B can read 256MB of the file

D. Client application B must wait until the entire file has been written, and will then read its entire contents.

A. Stores on the underlying filesystem of the local disk of the machine on which the Reducer.

B. In HDFS, in the job's output directory.

C. In HDFS, in temporary directory defined mapred.tmp.dir.

D. On the underlying filesystem of the local disk of the machine on which the Mapper ran.

E. On the underlying filesystem of the local disk machine on which the JobTracker ran.

A. The datanode writes a metadata file with the name of the file the block is associated with

B. The datanode updates it's log of checkum verification

C. A metadata file is return to the datanode containing all the other node locations in the namespace

D. The datanode runs a block scanner datablock scanner to verify the return blocks.

E. A metadata file is written to the datanode containing the checksums for each block

A. When the typical workloads consumes a large amount of input data, relative to the entire capacity of HDFS.

B. When the typical workloads generates a large amount of intermediate data, on the order of the input data itself.

C. When the typical workloads generates a large amount of output data, significantly larger than the amount of intermediate data.

D. When the typical workloads consists of processor-intensive tasks.

A. Run hadoop fs -du / and locate the dfs remaining value

B. Connect to http://mynamenode:50070/and locate the dfs remaining value

C. Run hadoop dfsadmin - report and locate the DFS remaming value

D. Run hadoop DFSAdmin -spaceQuota and subtract DFS used % from configured capacity