最新的Cloudera CCA-410免費考試真題

問題1

You configure Hadoop cluster with both MapReduce frameworks, MapReduce v1 (MRv1) and MapReduce v2 (MRv2/YARN). Which two MapReduce (computational) daemons do you need to configure to run on your master nodes?

A. ResourceManager

B. NodeManager

C. JournalNode

D. JobTracker

E. ApplicationMaster

正確答案: A,D

說明：（僅 Fast2test 成員可見）

問題2

Each slave node in your cluster has four 2 TB hard drives installed (4x2TB). You set a value of the dfs.du.datanode.received parameter to 100GB on each slave node. How does this alter HDFS block storage?

A. 100 GB on each hard drive may not be used to store HDFS blocks

B. All Hard drives may be used to store HDFS blocks as long as at least 100GB in total is available on the node

C. 25 GB on each hard drive may not be used to store HDFS Blocks

D. a maximum of 100GB on each hard drive may be used to store HDFS blocks

正確答案: A

說明：（僅 Fast2test 成員可見）

問題3

How must you format the underlying filesystem of your Hadoop cluster's slave nodes running on Linux?

A. They must be formatted as HDFS

B. They must be formatted as either ext3 or ext4

C. They must not be formatted - - HDFS will format the filesystem automatically

D. They may be formatted in nay Linux filesystem

正確答案: D

說明：（僅 Fast2test 成員可見）

問題4

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

A. Job coordination between the resource manager and the node manager

B. Health status check (heartbeats)

C. Managing tasks

D. Launching tasks

E. Managing file system metadata

F. MapReduce metric reporting

G. Resource management

H. Job scheduling/monitoring

正確答案: G,H

說明：（僅 Fast2test 成員可見）

問題5

Your company stores user profile records in an OLTP database. You want to join these records with webserver logs. You have already ingested into the hadoop file system. What is the best way to obtain and ingest these user records?

A. Ingest with SQL import

B. Ingest using the HDFS put command

C. Ingest with hadoop streaming

D. Ingest using hives LOAD DATA command

E. Ingest with flume agents

F. Ingest with Pig's Load Command

正確答案: E

說明：（僅 Fast2test 成員可見）

問題6

You has a cluster running with the Fail Scheduler enabled. There are currently no jobs running on the cluster you submit a job A, so that only job A is running on the cluster. A while later, you submit job B.
Now job A and Job B are running on the cluster al the same time. How will the Fair' Scheduler handle these two Jobs?

A. When job A gets submitted, it doesn't consume all the task slot

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

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

D. When job A gets submitted, it consumes all the task slot

正確答案: B

說明：（僅 Fast2test 成員可見）

問題7

Your Hadoop cluster contains nodes in three racks. Choose which scenario results if you leave the dfs.hosts property in the NameNode's configuration file empty (blank)?

A. The NameNode will update dfs.hosts property to include machines running the DataNode daemon on the next NameNode reboot or with a dfsadmin -refreshNodes.

B. No new can be added to the cluster until you specify them in the dfs.hosts file.

C. Presented with a blank dfs.hosts property, the NameNode will permit DataNodes specified in mapred.hosts to join the cluster.

D. Any machine running the DataNode daemon can immediately join the cluster.

正確答案: B

說明：（僅 Fast2test 成員可見）

問題8

You set up the Hadoop cluster using NameNode Federation. One NameNode manages the/users namespace and one NameNode manages the/data namespace. What happens when client tries to write a file to/reports/myreport.txt?

A. The file successfully writes to /users/reports/myreports/myreport.txt.

B. The file successfully writes to /report/myreport.txt. The metadata for the file is managed by the first NameNode to which the client connects.

C. The file writes fails silently; no file is written, no error is reported.

D. The client throws an exception.

正確答案: B

說明：（僅 Fast2test 成員可見）

問題9

What is the rule governing the formatting of the underlying filesystem in the hadoop cluster?

A. They can use different file system

B. they must all be left as formatted raw disk, hadoop format them automatically

C. They must all use the same filesystem as the namenode

D. They must all be left as unformatted, rawdisk;hadoop uses raw unformatted disk for HDFS

E. They must all use the same file system but this does not need to be the same filesystem as the filesystem used by the namenode

正確答案: C

問題10

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 two Standby NameNodes

B. Two active NameNodes and one Standby NameNode

C. Unlimited. HDFS High Availability (HA) is designed to overcome limitations on the number of NameNodes you can deploy.

D. One active NameNode and one Standby NameNode

正確答案: D

說明：（僅 Fast2test 成員可見）

最新的Cloudera Certified Administrator for Apache Hadoop CDH4 - CCA-410免費考試真題

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