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Cloudera CCA-410 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Cluster Monitoring and Troubleshooting | - Performance tuning and optimization
|
| Topic 2: Cluster Architecture and Installation | - Cloudera Manager administration
|
| Topic 3: MapReduce and Processing Framework | - MapReduce v1 execution model (CDH4)
|
| Topic 4: HDFS Management | - HDFS architecture and operations
|
| Topic 5: Security and User Management | - Authentication and authorization
|
Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:
Which two features does Kerberos security add to a Hadoop cluster?
- A. Authentication for user access to the cluster against a central server
- B. User authentication on all remote procedure calls (RPcs)
- C. Root access to the cluster for users hdfs and mapred but non-root acess clients
- D. Encryption on all remote procedure calls (RPCs)
- E. Encryption for data on disk ("at rest")
Correct Answer: A,B 🗳️
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How must you format the underlying filesystem of your Hadoop cluster's slave nodes running on Linux?
- A. They may be formatted in nay Linux filesystem
- B. They must be formatted as HDFS
- C. They must be formatted as either ext3 or ext4
- D. They must not be formatted - - HDFS will format the filesystem automatically
Correct Answer: A 🗳️
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Each slave node in your cluster has four 2 TB hard drives installed (4x2TB). You set a value of the dfs.du.datanode.received parameter to 100GB on each slave node. How does this alter HDFS block storage?
- A. 25 GB on each hard drive may not be used to store HDFS Blocks
- B. 100 GB on each hard drive may not be used to store HDFS blocks
- C. a maximum of 100GB on each hard drive may be used to store HDFS blocks
- D. All Hard drives may be used to store HDFS blocks as long as at least 100GB in total is available on the node
Correct Answer: B 🗳️
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What determines the number of Reduces that run a given MapReduce job on a cluster running MapReduce v1 (MRv1)?
- A. It is set by the Hadoop framework and is based on the number of InputSplits of the job.
- B. It is set by the developer.
- C. It is set and fixed by the cluster administrator in mapred-site.xml. The number set always run for any submitted job.
- D. It is set by the JobTracker based on the amount of intermediate data.
Correct Answer: B 🗳️
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When planning a hadoop cluster, what general rule governs the hardware requirements between master nodes and slave nodes?
- A. The master nodes requires more memory but less disk capacity
- B. The master and slave nodes should have the same hardware configuration
- C. The master nodes requires more memory and no disk drives
- D. The master nodes require more memory and greater disk capacity then the slave nodes
- E. the master nodes requires less memory and fewer number disk drives than the slave nodes
Correct Answer: A 🗳️
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