最新的Cloudera Certified Administrator for Apache Hadoop (CCAH) - CCA-500免費考試真題

A. Capacity Scheduler

B. FIFO Scheduler

C. Fair Scheduler

D. Complexity Fair Scheduler (CFS)

A. When Job B gets submitted, Job A has to finish first, before job B can gets scheduled.

B. When Job B gets submitted, it will get assigned tasks, while job A continues to run with fewer tasks.

C. When Job A gets submitted, it consumes all the task slots.

D. When Job A gets submitted, it doesn't consumes all the task slots.

A. Even for small clusters on a single rack, configuring rack awareness will improve performance

B. HDFS is rack aware but MapReduce daemon are not

C. Hadoop gives preference to intra-rack data transfer in order to conserve bandwidth

D. Configuration of rack awareness is accomplished using a configuration file. You cannot use a rack topology script.

E. Rack location is considered in the HDFS block placement policy

A. Resource pressure on the JobTracker

B. Standardize on a single MapReduce API

C. Reduce complexity of the MapReduce APIs

D. HDFS latency

E. Single point of failure in the NameNode

F. Ability to run framework other than MapReduce, such as MPI

A. This will be immediately re-replicated and all other HDFS operations on the cluster will halt until the cluster's
replication values are resorted

B. The file will be re-replicated automatically after the NameNode determines it is under-replicated based on the
block reports it receives from the NameNodes

C. The file will remain under-replicated until the administrator brings that node back online

D. The cluster will re-replicate the file the next time the system administrator reboots the NameNode daemon (as long
as the file's replication factor doesn't fall below)

A. YARN holds the intermediate data in the NodeManager's memory (a container) until it is transferred to the Reducer

B. The Mapper stores the intermediate data on the underlying filesystem of the local disk in the directories
yarn.nodemanager.locak-DIFS

C. The Mapper stores the intermediate data in HDFS on the node where the Map tasks ran in the HDFS
/usercache/&(user)/apache/application_&(appid) directory for the user who ran the job

D. The Mapper transfers the intermediate data immediately to the reducers as it is generated by the Map Task

E. The Mapper stores the intermediate data on the node running the Job's ApplicationMaster so that it is available to
YARN ShuffleService before the data is presented to the Reducer