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Question ID 20589

In a Hadoop cluster for running production jobs that require short turnaround times, the
most important consideration for slave nodes is:

Option A

The ratio between the amount of memory and the number of disk drives.

Option B

The ratio between the amount of memory and the total storage capacity.

Option C

The ratio between the number of processor cores and the amount of memory.

Option D

The ratio between the number of processor cores and total storage capacity.

Option E

The ratio between the number of processor cores and number of disk drives.

Correct Answer C,E
Explanation


Question ID 20590

A client wants to read a file from HDFS. How does the data get from the DataNodes to the client?

Option A

The NameNode reads the blocks from the DataNodes, and caches them. Then, the application reads the blocks from the NameNode.

Option B

The application reads the blocks directly from the DataNodes.

Option C

The blocks are sent to a single DataNode, then the application reads the blocks from that Data Node.

Correct Answer B
Explanation Reference: http://kazman.shidler.hawaii.edu/ArchDocOverview.html

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