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Cloudera CCA-410 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Security and User Management | - Authentication and authorization
|
| Topic 2: MapReduce and Processing Framework | - MapReduce v1 execution model (CDH4)
|
| Topic 3: Cluster Monitoring and Troubleshooting | - Monitoring tools and logs
|
| Topic 4: HDFS Management | - Data lifecycle operations
|
| Topic 5: Cluster Architecture and Installation | - CDH4 cluster planning and deployment
|
Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:
Your Hadoop cluster contains nodes in three racks. Choose which scenario results if you leave the dfs.hosts property in the NameNode's configuration file empty (blank)?
- A. The NameNode will update dfs.hosts property to include machines running the DataNode daemon on the next NameNode reboot or with a dfsadmin -refreshNodes.
- B. Presented with a blank dfs.hosts property, the NameNode will permit DataNodes specified in mapred.hosts to join the cluster.
- C. Any machine running the DataNode daemon can immediately join the cluster.
- D. No new can be added to the cluster until you specify them in the dfs.hosts file.
Correct Answer: D 🗳️
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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 number of processor cores and number of disk drives.
- B. The ratio between the number of processor cores and total storage capacity.
- C. The ratio between the amount of memory and the total storage capacity.
- D. The ratio between the amount of memory and the number of disk drives.
- E. The ratio between the number of processor cores and the amount of memory.
Correct Answer: A 🗳️
Your Hadoop cluster has 25 nodes with a total of 100 TB (4 TB per node) of raw disk space allocated HDFS storage. Assuming Hadoop's default configuration, how much data will you be able to store?
- A. Approximately 100TB
- B. Approximately 10TB
- C. Approximately 33 TB
- D. Approximately 25TB
Correct Answer: C 🗳️
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What is the recommended disk configuration for slave nodes in your Hadoop cluster with 6 x 2 TB hard drives?
- A. RAID 1+0
- B. RAID 10
- C. JBOD
- D. RAID 5
Correct Answer: C 🗳️
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You install Cloudera Manager on a cluster where each host has 1 GB of RAM. All of the services show their status as concerning. However, all jobs submitted complete without an error.
Why is Cloudera Manager showing the concerning status KM the services?
- A. The slave nodes, haven't sent a heartbeat in 60 minutes
- B. A slave node's disk ran out of space
- C. DataNode service instance has crashed.
- D. The slave nodes are swapping.
Correct Answer: A 🗳️
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