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Cloudera CCA-470 Exam Syllabus Topics:

Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH) Sample Questions:

1. Which two features does Kerberos security add to a Hadoop cluster?

A) Root access to the cluster for users hdfs and mapred but non-root acess clients
B) Encryption for data on disk ("at rest")
C) Encryption on all remote procedure calls (RPCs)
D) Authentication for user access to the cluster against a central server
E) User authentication on all remote procedure calls (RPcs)

2. Under which of the following scenarios would it be most appropriate to consider using faster (e.g., 10 Gigabit) Ethernet as the network fabric for your Hadoop cluster?

A) When the typical workload consumes a large amount of input data, relative to the entire Canada of HDFS.
B) When the typical workload consists of processor-intensive tasks.
C) When the typical workload generates a large amount of intermediate data, on the order of the input data itself.
D) When the typical workload generates a large amount of output data, significantly larger than the amount of intermediate data.

3. It is recommended that you run the HDFS balancer periodically. Why? (Choose 3)

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

4. You are planning a Hadoop duster, and you expect to be receiving just under 1TB of data per week which will be stored on the cluster, using Hadoop's default replication. You decide that your slave nodes will be configured with 4 x 1TB disks.
Calculate how many slave nodes you need to deploy at a minimum to store one year's worth of data.

A) 10 slave nodes
B) 100 slave nodes
C) 100 slave nodes
D) 50 slave nodes

5. 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 copied into HDFS.
B) Cached on the local disk of the slave node running the task, then purged immediately upon task completion.
C) On the local disk of the slave node running the task.
D) In HDFS, in the directory of the user who generates the job.

Solutions: