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Cloudera CCA-470 Exam Syllabus Topics:

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

1. Under which scenario 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 workloads consists of processor-intensive tasks.
B) When the typical workloads generates a large amount of intermediate data, on the order of the input data itself.
C) When the typical workloads consumes a large amount of input data, relative to the entire capacity of HDFS.
D) When the typical workloads generates a large amount of output data, significantly larger than the amount of intermediate data.

2. How does the HDFS architecture provide redundancy?

A) DataNodes make copies of their data blocks, and put them on different local disks.
B) Reliance on SAN devices as a DataNode interface.
C) Storing multiple replicas of data blocks on different DataNodes.
D) Reliance on RAID at each datanode.

3. When determining the most appropriate ratio of processor cores to disk drives for a Hadoop cluster, what are the considerations?

A) Disk drives per machine, nothing else matters.
B) Disk drives per core and workload types
C) Disk drives per core without consideration to workload types
D) Processors and disk drives per machine, the workload doesn't matter
E) Processor core counts and workload type, the ratio doesn't matter

4. Identity four pieces of cluster information that are stored on disk on the NameNode?

A) File permissions of the files in HDFS.
B) An edit log of changes that have been made since the last snapshot compaction by the Secondary NameNode.
C) The directory structure of the files in HDFS.
D) The status of the heartbeats of each DataNode.
E) A catalog of DataNodes and the blocks that are stored on them.
F) Names of the files in HDFS.
G) An edit log of changes that have been made since the last snapshot of the NameNode.

5. For a MapReduce job, what's the relationship between tasks and task attempts?

A) There are always at least as many task attempts as there are tasks.
B) There are always at most as many task attempts as there are tasks.
C) There are always exactly as many task attempts as there are tasks.

Solutions: