Cloudera CCAH CCA-470

1、100％の本格的なCCA-470試験問題集は過去の試験問題及び最新模擬試験問題から作られたものです。
2、業界最先端のCCA-470模擬試験ｿﾌﾄは実際の試験雰囲気を模擬したものです。
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弊社は一発合格することを保証し、もし弊社の問題集CCA-470 「Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH)」を使ってから、試験を通っていなかったら、弊社は全額を返金します。 弊社は一年以内に無料更新版を提供し、一発合格することを保証できます。

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Cloudera CCA-470 「Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH)」はCloudera資格認定の重要な試験集です。該当アイクオリサートロジックCCA-470模擬試験集は非常に理想的な試験に備えるツールと言えます。もし、CCA-470模擬試験を御利用頂くと、以前の過去試験問題とほぼ同じの現行問題をご体験できます。全部の問題集は弊社の専業認証人員が念入りに編纂されたものです。ご受験者は高額教育活動にわざわざ参加する必要がなく、ただ20時間か30時間の気楽な一連の準備、勉強記憶及び模擬テストだけで、受験できます。100％一発合格！失敗一回なら、全額返金！

Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH) 認定 CCA-470 試験問題:

1. Identify the function performed by the Secondary NameNode daemon on a cluster configured to run with a single NameNode.

A) In this configuration, the Secondary NameNode servers as alternate data channel for clients to reach HDFS, should the NameNode become too busy.
B) In this configuration, the Secondary NameNode performs a checkpoint operation on the files by the NameNode.
C) In this configuration, the Secondary NameNode is standby NameNode, ready to failover and provide high availability.
D) In this configuration, the Secondary NameNode performs deal-time backups of the NameNode.

2. Which two updates occur when a client application opens a stream to begin a file write on a cluster running MapReduce v1 (MRv1)?

A) The change is written to the NameNode disk.
B) The metadata in RAM on the NameNode is updated.
C) The change is written to the edits file.
D) The metadata in the RAM on the NameNode is flushed to disk.
E) The metadata in RAM on the NameNode is flushed disk.
F) Once the write stream closes on the DataNode, the DataNode immediately initiates a black report to the NameNode.

3. On a cluster running MapReduce v1 (MRv1), 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) We cannot say; the number of Mappers is determined by the developer
B) 30
C) 1
D) 10

4. What action occurs automatically on a cluster when a DataNode is marked as dead?

A) The NameNode forces re-replication of all the blocks which were stored on the dead DataNode.
B) The replication factor of the files which had blocks stored on the dead DataNode is temporarily reduced, until the dead DataNode is recovered and returned to the cluster.
C) The next time a client submits job that requires blocks from the dead DataNode, the JobTracker receives no heart beats from the DataNode. The JobTracker tells the NameNode that the DataNode is dead, which triggers block re-replication on the cluster.
D) The NameNode informs the client which write the blocks that are no longer available; the client then re-writes the blocks to a different DataNode.

5. Choose three reasons why should you run the HDFS balancer periodically?

A) To ensure that there is consistent disk utilization across the DataNodes.
B) To ensure that there is capacity in HDFS tor additional data.
C) To ensure that all blocks in the cluster are 128MB in size.
D) To help HDFS deliver consistent performance under heavy loads.
E) To improve data locality for MapReduce tasks.

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