최신 CCA-500 무료덤프 - Cloudera Certified Administrator for Apache Hadoop (CCAH)

A. They must not be formatted - - HDFS will format the file system automatically

B. They may be formatted in any Linux file system

C. They must be formatted as HDFS

D. They must be formatted as either ext3 or ext4

A. Run hdfs dfs / and subtract NDFS Used from configured Capacity

B. Connect to http://mynamenode:50070/dfshealth.jsp and locate the DFS remaining value

C. Run hdfs dfsadmin -report and locate the DFS Remaining value

D. Run hdfs fs -du / and locate the DFS Remaining value

A. 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 speculative execution framework.

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

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

D. 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 any given time.

A. 30

B. We cannot say; the number of Mappers is determined by the developer

C. We cannot say; the number of mappers is determined by the ApplicationMaster

D. 3

E. We cannot say; the number of Mappers is determined by the ResourceManager

F. 10

A. fstime

B. Edits_N-M (where N-M transactions between transaction ID N and transaction ID N)

C. VERSION

D. Fsimage_N (where N reflects transactions up to transaction ID N)

A. The directory name is misspelled in HDFS

B. The name of the driver has been spelled incorrectly on the command line

C. The Hadoop configuration files on the client do not point to the cluster

D. The user is not authorized to run the job on the cluster

E. The output directory already exists