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Question ID 20585

Compare the hardware requirements of the NameNode with that of the DataNodes in a
Hadoop cluster:

Option A

 The NameNode requires more memory and no disk drives.

Option B

 The NameNode requires more memory but less disk capacity.

Option C

The NameNode and DataNodes should have the same hardware configuration.

Option D

 The NameNode requires less memory and fewer number of disk drives than the DataNodes.

Option E

The NameNode requires more memory and requires greater disk capacity than the DataNodes.

Correct Answer B
Explanation Reference: http://www.atlantbh.com/how-to-build-optimal-hadoop-cluster/ (Hardware requirements, basic hardware recommendation)


Question ID 20586

You have a cluster running with the FIFO scheduler enabled. You submit a large job A to
the cluster which you expect to run for one hour. Then, you submit job B to the cluster,
which you expect to run a couple of minutes only. Lets assume both jobs are running at
the same priority.
How does the FIFO scheduler execute the jobs? (Choose 3)

Option A

 The order of execution of tasks within a job may vary.

Option B

When a job is submitted, all tasks belonging to that job are scheduled.

Option C

Given jobs A and B submitted in that order, all tasks from job A will be scheduled before all tasks from job B.

Option D

Since job B needs only a few tasks, if might finish before job A completes.

Correct Answer A,B,C
Explanation

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