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最新的 CCAH CCA-410 免費考試真題:

1. MapReduce V2 (MRv2/YARN) splits which two major functions of the jobtracker into separate daemons?

A) Health status check (heartbeats)
B) Job scheduling/monitoring
C) Job coordination between the resource manager and the node manager
D) Launching tasks
E) Managing tasks
F) MapReduce metric reporting
G) Managing file system metadata
H) Resource management

2. In the execution of a MapReduce job, where does the mapper place the intermediate data in each map task?

A) The mapper stores the intermediate data on the underlying filesystem of the local disk of the machine which ran the map task
B) The mapper transfers the intermediate data to the jobtracker, which then sends it to the reducers
C) The hadoop framework holds the intermediate data in the task trackers memory until it is transferred to the reducers
D) The mapper transfer the intermediate data immediately to the reducers as it is generated by map task.

3. Which two daemons must be installed on master nodes in hadoop cluster running mapreduce V1 (MRV1)?

A) Datanode
B) Tasktracker
C) Hmaster
D) Zookeeper
E) Namenode
F) Resourcemanager
G) ApplicationMaster

4. You have cluster running with the FIFO Scheduler enabled. You submit a large job A to the cluster, which you expect to run for one hour. Then, you submit job B to cluster, which you expect to run a couple of minutes only.
You submit both jobs with the same priority.
Which two best describes how the FIFO Scheduler arbitrates the cluster resources for a job and its tasks?

A) The FIFO Schedule will pass an exception back to the client when Job B is submitted, since all slots on the cluster are in use.
B) Because there is more then a single job on the cluster, the FIFO Scheduler will enforce a limit on the percentage of resources allocated to a particular job at any given time.
C) Tasks are scheduled in the order of their jobs' submission.
D) The order of execution of tasks within a job may vary.
E) Given Jobs A and B submitted in that order, all tasks from job A are guaranteed to finish before all tasks from job B.
F) The FIFO Scheduler will give, on average, equal share of the cluster resources over the job lifecycle.

5. Choose which best describe a Hadoop cluster's block size storage parameters once you set the HDFS default block size to 64MB?

A) The block size of files in the cluster will all be the exactly 64MB.
B) The block size of files in the duster will all at least be 64MB.
C) The block size of files in the Cluster will all be multiples of 64M
D) The block size of files in the cluster can be determined as the block is written.

問題與答案：

問題 #1 答案： B,H

問題 #2 答案： A

問題 #3 答案： E,G

問題 #4 答案： C,D

問題 #5 答案： A