最新なCloudera CCA-500問題集（60題）、真実試験の問題を全部にカバー！

質問 1：
What does CDH packaging do on install to facilitate Kerberos security setup?
A. Creates and configures your kdc with default cluster values
B. Creates a set of pre-configured Kerberos keytab files and their permissions
C. Automatically configures permissions for log files at &MAPRED_LOG_DIR/userlogs
D. Creates directories for temp, hdfs, and mapreduce with the correct permissions
E. Creates users for hdfs and mapreduce to facilitate role assignment
正解：E

質問 2：
Which two are features of Hadoop's rack topology?
A. Rack location is considered in the HDFS block placement policy
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. Even for small clusters on a single rack, configuring rack awareness will improve performance
E. Configuration of rack awareness is accomplished using a configuration file. You cannot use a rack topology script.
正解：A,D

質問 3：
Assuming a cluster running HDFS, MapReduce version 2 (MRv2) on YARN with all settings at their default, what do you
need to do when adding a new slave node to cluster?
A. Nothing, other than ensuring that the DNS (or/etc/hosts files on all machines) contains any entry for the new node.
B. Restart the NameNode of dfs.number.of.nodes in hdfs-site.xml
C. Add a new entry to /etc/nodes on the NameNode host.
D. Restart the NameNode and ResourceManager daemons and resubmit any running jobs.
正解：D

質問 4：
You're upgrading a Hadoop cluster from HDFS and MapReduce version 1 (MRv1) to one running HDFS and MapReduce
version 2 (MRv2) on YARN. You want to set and enforce version 1 (MRv1) to one running HDFS and MapReduce
version 2 (MRv2) on YARN. You want to set and enforce a block size of 128MB for all new files written to the cluster
after upgrade. What should you do?
A. Set dfs.block.size to 128 M on all the worker nodes and client machines, and set the parameter to final. You do not
need to set this value on the NameNode
B. Set dfs.block.size to 134217728 on all the worker nodes, on all client machines, and on the NameNode, and set the
parameter to final
C. You cannot enforce this, since client code can always override this value
D. Set dfs.block.size to 128M on all the worker nodes, on all client machines, and on the NameNode, and set the
parameter to final
E. Set dfs.block.size to 134217728 on all the worker nodes and client machines, and set the parameter to final. You do
not need to set this value on the NameNode
正解：A

質問 5：
Which process instantiates user code, and executes map and reduce tasks on a cluster running MapReduce v2 (MRv2)
on YARN?
A. NameNode
B. DataNode
C. ApplicationMaster
D. ResourceManager
E. TaskTracker
F. NodeManager
G. JobTracker
正解：G

質問 6：
Given:

You want to clean up this list by removing jobs where the State is KILLED. What command you enter?
A. Yarn rmadmin -refreshQueue
B. Yarn application -refreshJobHistory
C. Yarn rmadmin -kill application_1374638600275_0109
D. Yarn application -kill application_1374638600275_0109
正解：D
解説: (Pass4Test メンバーにのみ表示されます)