최신 CCAH CCA-505 무료샘플문제:
1. What processes must you do if you are running a Hadoop cluster with a single NameNode and six DataNodes, and you want to change a configuration parameter so that it affects all six DataNodes.
A) You must modify the configuration file on each of the six DataNode machines.
B) You don't need to restart any daemon, as they will pick up changes automatically
C) You must restart all six DatNode daemon to apply the changes to the cluste
D) You must modify the configuration files on the NameNode only. DataNodes read their configuration from the master nodes.
E) You must restart the NameNode daemon to apply the changes to the cluster
2. On a cluster running MapReduce v2 (MRv2) on YARN, a MapReduce job is given a directory of 10 plain text as its input directory. Each file is made up of 3 HDFS blocks. How many Mappers will run?
A) 30
B) We cannot say; the number of Mappers is determined by the RsourceManager
C) We cannot say; the number of Mappers is determined by the developer
D) 10
E) 3
F) We cannot say; the number of Mappers is determined by the ApplicationManager
3. You are configuring a cluster running HDFS, MapReduce version 2 (MRv2) on YARN
running Linux. How must you format the underlying filesystem of each DataNode?
A) They may be formatted in any Linux filesystem
B) They must be formatted as either ext3 or ext4
C) They must not formatted - - HDFS will format the filesystem automatically
D) They must be formatted as HDFS
4. Your Hadoop cluster contains nodes in three racks. You have NOT configured the dfs.hosts property in the NameNode's configuration file. What results?
A) Presented with a blank dfs.hosts property, the NameNode will permit DatNode specified in mapred.hosts to join the cluster
B) The NameNode will update the dfs.hosts property to include machine running DataNode daemon on the next NameNode reboot or with the command dfsadmin -refreshNodes
C) Any machine running the DataNode daemon can immediately join the cluster
D) No new nodes can be added to the cluster until you specify them in the dfs.hosts file
질문과 대답:
| 질문 # 1 정답: D,E | 질문 # 2 정답: E | 질문 # 3 정답: B | 질문 # 4 정답: C |
753 개 고객 리뷰
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