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Cloudera CCA-410 Exam Syllabus Topics:

Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:

1. You have a cluster running with the fair scheduler enabled and configured. You submit multiple jobs to the cluster. Each job is assigned to a pool. What are the two key points to remember about how jobs are scheduled with the fair scheduler?

A) Each pools share of the tasks slots remains static within the execution of any individual job
B) Each pools share of task slots may change throughout the course of job execution
C) Pools get a dynamically-allocated share of the available task slots (subject to additional constraints)
D) Each pool gets 1/N of the total available tasks slots, where N is the no of jobs running on the cluster
E) Each pool gets 1/M of the total available tasks slots, where M is the no. of nodes in the cluster
F) Pools are assigned priorites.pools with higher priorities an executed b4 pools with lower priorities

2. On a cluster running MapReduce v1 (MRv1), a MapReduce job is given a directory of 10 plain text as its input directory. Each file is made up of 3 HDFS blocks. How many Mappers will run?

A) 1
B) 30
C) We cannot say; the number of Mappers is determined by the developer
D) 10

3. Which MapReduce daemon instantiates user code, and executes map and reduce tasks on a cluster running MapReduce v1 (MRv1)?

A) ResourceManager
B) ApplicationMaster
C) NodeManager
D) JobTracker
E) NameNode
F) DataNode
G) TaskTracker

4. You set up the Hadoop cluster using NameNode Federation. One NameNode manages the/users namespace and one NameNode manages the/data namespace. What happens when client tries to write a file to/reports/myreport.txt?

A) The file successfully writes to /users/reports/myreports/myreport.txt.
B) The file successfully writes to /report/myreport.txt. The metadata for the file is managed by the first NameNode to which the client connects.
C) The file writes fails silently; no file is written, no error is reported.
D) The client throws an exception.

5. The most important consideration for slave nodes in a Hadoop cluster running production jobs that require short turnaround times is:

A) The ratio between the amount of memory and the total storage capacity.
B) The ratio between the number of processor cores and total storage capacity.
C) The ratio between the number of processor cores and the amount of memory.
D) The ratio between the number of processor cores and number of disk drives.
E) The ratio between the amount of memory and the number of disk drives.

Solutions: