Cloudera CCA-410 - Cloudera Certified Administrator for Apache Hadoop CDH4

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Cloudera CCA-410 Exam Syllabus Topics:

Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:

1. Identify the daemon that performs checkpoint operations of the namespace state in a cluster configured with HDFS High Availability (HA) using Quorum based-storage?

A) Standby NameNode
B) NodeManeger
C) NameNode
D) JournalNode
E) CheckpointNode
F) BackupNode
G) Secondary NameNode

2. 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) Any machine running the DataNode daemon can immediately join the cluster.
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) The NameNode will update dfs.hosts property to include machines running the DataNode daemon on the next NameNode reboot or with a dfsadmin -refreshNodes.

3. What is the recommended disk configuration for slave nodes in your Hadoop cluster with 6 x 2 TB hard drives?

A) RAID 10
B) RAID 1+0
C) RAID 5
D) JBOD

4. Which two occur when individual blocks are returned to DATANODE on a cluster local filesystem?

A) The datanode updates it's log of checkum verification
B) A metadata file is written to the datanode containing the checksums for each block
C) The datanode runs a block scanner datablock scanner to verify the return blocks.
D) The datanode writes a metadata file with the name of the file the block is associated with
E) A metadata file is return to the datanode containing all the other node locations in the namespace

5. Your cluster implements hdfs high availability (HA) your two namenodes are named hadoop01 and hadoop02. What occurs when you execute the command:
Sudo -u hdfs haadmin -failover hadoop01 hadoop02

A) Hadoop01 becomes inactive and hadoop02 becomes the active namenode
B) Hadoop02 becomes the standby namenode and hadoop01 becomes the active namenode
C) Hadoop01 is fenced, and hadoop02 becomes the active namenode
D) Hadoop02 is fenced, and hadoop01 becomes active namenode

Solutions: