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Cloudera CCA-410 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Security and Cluster Operations | - Operational maintenance
|
| Topic 2: Hadoop Cluster Architecture (CDH4) | - Core Hadoop components
|
| Topic 3: Cluster Monitoring and Troubleshooting | - Fault diagnosis
|
| Topic 4: HDFS Administration | - Filesystem management
|
| Topic 5: Data Processing Tools and Ecosystem | - Query and workflow tools
|
| Topic 6: Cluster Installation and Configuration | - CDH4 setup
|
Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:
Using cloudera manager on CDH4 cluster running mapreduce V1(MRv1), you delete a tasktracker role instance from a host that also a runs a datanode role instance and a region server role instance.cloudera
Manager make changes to the cluster and prompts you to the accept the changes.
What other configuration option will cloudera manager automatically prompt you to change?
- A. The option to failover to the instance by namenode
- B. the option to immediately rebalance the cluster
- C. The option to change java maximum heap sizes for the other role instances
- D. the option to specify an alternate slave host to place the received data node role instance
Correct Answer: D 🗳️
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. 10
- C. We cannot say; the number of Mappers is determined by the developer
- D. 30
Correct Answer: D 🗳️
Which two occur when individual blocks are returned to DATANODE on a cluster local filesystem?
- A. The datanode writes a metadata file with the name of the file the block is associated with
- B. The datanode runs a block scanner datablock scanner to verify the return blocks.
- C. A metadata file is written to the datanode containing the checksums for each block
- D. The datanode updates it's log of checkum verification
- E. A metadata file is return to the datanode containing all the other node locations in the namespace
Correct Answer: A,B 🗳️
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Your existing Hadoop cluster has 30 slave nodes, each of which has 4 x 2T hard drives. You plan to add another 10 nodes. How much disk space can your new nodes contain?
- A. The new nodes can contain any amount of disk space
- B. The new nodes must all contain 8TB of disk space, but it does not matter how the disks are configured
- C. The new nodes must all contain 4 x 2TB hard drives
- D. The new nodes cannot contain more than 8TB of disk space
Correct Answer: A 🗳️
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
Correct Answer: C 🗳️
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