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Question ID 20595

Assuming a large properly configured multi-rack Hadoop cluster, which scenario should not
result in loss of HDFS data assuming the default replication factor settings?

Option A

Ten percent of DataNodes simultaneously fail.

Option B

All DataNodes simultaneously fail.

Option C

An entire rack fails.

Option D

Multiple racks simultaneously fail.

Option E

Seventy percent of DataNodes simultaneously fail.

Correct Answer A
Explanation Reference: http://stackoverflow.com/questions/12399197/in-a-large-properly-configured- multi-rack-hadoop-cluster-which-scenarios-will-b


Question ID 20596

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

Option A

 Disk drives per machine, nothing else matters.

Option B

 Processors and disk drives per machine, the workload doesn't matter

Option C

Processor core counts and workload type, the ratio doesn't matter

Option D

Disk drives per core and workload types

Option E

Disk drives per core without consideration to workload types

Correct Answer D
Explanation

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