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Cloudera CCA-470 Exam Syllabus Topics:

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

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

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

2. Which three processes does HDFS High Availability (HA) enable on your cluster?

A) Manually 'fail over' between NameNodes
B) Write data to two clusterssimultaneously
C) Automatically 'fail over' between NameNodes if one goes down
D) Configure unlimited hot standby NameNode.
E) Shut one NameNode down for maintenance without halting the cluster

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

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

4. 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) User authentication on all remote procedure calls (RPcs)
C) Encryption on all remote procedure calls (RPCs)
D) Encryption for data on disk ("at rest")
E) Authentication for user access to the cluster against a central server

5. Cluster Summary
45 files and directories, 12 blocks = 57 total. Heap Size is 15.31 MB / 193.38MB(7%)

Refer to the above screenshot.
You configure the Hadoop cluster with seven DataNodes and the NameNode's web UI displays the details shown in the exhibit.
What does this tells you?

A) One physical host crashed.
B) The DataNode JVM on one host is not active.
C) The HDFS cluster is in the safe mode.
D) Your cluster has lost all HDFS data which had blocks stored on the dead DataNode.

Solutions: