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Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH) Sample Questions:

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

A) The blocks are sent to a single DataNode, then the application reads the blocks from that Data Node.
B) The application reads the blocks directly from the DataNodes.
C) The NameNode reads the blocks from the DataNodes, and caches them. Then, the application reads the blocks from the NameNode.

2. Choose which best describe a Hadoop cluster's block size storage parameters once you set the HDFS default block size to 64MB?

A) The block size of files in the cluster can be determined as the block is written.
B) The block size of files in the duster will all at least be 64MB.
C) The block size of files in the cluster will all be the exactly 64MB.
D) The block size of files in the Cluster will all be multiples of 64M

3. In a cluster configured with HDFS High Availability (HA) but NOT HDFS federation, each map task run:

A) In the same Java Virtual Machine as the DataNode.
B) In the same Java Virtual Machine as the TaskTracker
C) In the same Java Virtual Machine as the JobTracker.
D) In its own Java Virtual Machine.

4. The failure of which daemon makes HDFS unavailable on a cluster running MapReduce v1 (MRv1)?

A) DataNode
B) Resource Manager
C) Secondary NameNode
D) NameNode
E) Application Manager
F) Node Manager

5. What happens if a Mapper on one node goes into an infinite loop while running a MapReduce job?

A) After a period of time, the TaskTracker will kill the Map Task.
B) The job will immediately fail.
C) After a period of time, the JobTracker will restart the TaskTracker on the node on which the map task is running
D) The Mapper will run indefinitely; the TaskTracker must be restarted to kill it

Solutions:

Question # 1 Answer: B

Question # 2 Answer: C

Question # 3 Answer: D

Question # 4 Answer: D

Question # 5 Answer: A