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Question ID 20597	You have a cluster running with the Fair in Scheduler enabled. There are currently no jobs running on the cluster, and you submit a job A, so that only job A is running on the cluster. A while later, you submit job B, Now job A and job B are running on the cluster at the same time. Which of the following describes how the Fair Scheduler operates? (Choose 2)
Option A	When job B gets submitted, it will get assigned tasks, while job A continues to run with fewer tasks.
Option B	When job A gets submitted, it doesn't consume all the task slots.
Option C	When job A gets submitted, it consumes all the task slots.
Option D	When job B gets submitted, job A has to finish first, before job B can get scheduled.
Correct Answer	C,D

Explanation Reference: http://hadoop.apache.org/common/docs/r0.20.2/fair_scheduler.html (introduction, first paragraph)

Question ID 20598	What would be a reasonable configuration of disk drives in a Hadoop datanode?
Option A	Four 1TB disk drives in a RAID configuration
Option B	One 1TB disk drive
Option C	Four 1TB disk drives in a JBOD configuration
Option D	48 1.5TB disk drives in a JBOD configuration
Option E	48 1.5 TB disk drives in a RAID configuration
Correct Answer	C

Explanation Reference: http://www.cloudera.com/blog/2010/03/clouderas-support-team-shares-some- basic-hardware-recommendations/ (How to pick hardware for your hadoop cluster, see first bulleted point)

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