최신 CCAH CCA-470 무료샘플문제:
1. Assuming a large properly configured multi-rack Hadoop cluster, which scenario should not result in loss of HDFS data assuming the default replication factor settings?
A) Ten percent of DataNodes simultaneously fail.
B) Multiple racks simultaneously fail.
C) An entire rack fails.
D) All DataNodes simultaneously fail.
E) Seventy percent of DataNodes simultaneously fail.
2. You configure you cluster with HDFS High Availability (HA) using Quorum-Based storage. You do not implement HDFS Federation.
What is the maximum number of NameNodes daemon you should run on you cluster in order to avoid a "split-brain" scenario with your NameNodes?
A) Two active NameNodes and one Standby NameNode
B) Unlimited. HDFS High Availability (HA) is designed to overcome limitations on the number of NameNodes you can deploy.
C) Two active NameNodes and two Standby NameNodes
D) One active NameNode and one Standby NameNode
3. For each job, the Hadoop framework generates task log files. Where are Hadoop's task log files stored?
A) Cached on the local disk of the slave node running the task, then purged immediately upon task completion.
B) In HDFS, in the directory of the user who generates the job.
C) On the local disk of the slave node running the task.
D) Cached on the local disk of the slave node running the task, then copied into HDFS.
4. Hadoop provider web interface can be used for all of the following EXCEPT: (choose 1)
A) Keeping track of processor and memory utilization on each individual slave node.
B) Keeping track of jobs running on the cluster.
C) Browsing files in HDFS.
D) Keeping track of tasks running on each individual slave node.
E) Keeping track of the number of files and directories stored in HDFS.
5. What additional capability does Ganglia provide to monitor a Hadoop?
A) Ability to monitor processor utilization.
B) Ability to monitor NameNode memory usage.
C) Ability to monitor free task slots.
D) Ability to monitor number of files in HDFS.
E) Ability to monitor the amount of free space on HDFS.
질문과 대답:
| 질문 # 1 정답: A | 질문 # 2 정답: D | 질문 # 3 정답: B | 질문 # 4 정답: D | 질문 # 5 정답: B |
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