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Cloudera CCA-410 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Hadoop Cluster Architecture (CDH4) | - Cluster roles and services
|
| Topic 2: Cluster Installation and Configuration | - Service configuration
|
| Topic 3: Cluster Monitoring and Troubleshooting | - Fault diagnosis
|
| Topic 4: Security and Cluster Operations | - Security configuration
|
| Topic 5: HDFS Administration | - Storage maintenance
|
| Topic 6: Data Processing Tools and Ecosystem | - Data ingestion and processing tools
|
Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:
You are planning a Hadoop duster, and you expect to be receiving just under 1TB of data per week which will be stored on the cluster, using Hadoop's default replication. You decide that your slave nodes will be configured with 4 x 1TB disks.
Calculate how many slave nodes you need to deploy at a minimum to store one year's worth of data.
- A. 100 slave nodes
- B. 50 slave nodes
- C. 100 slave nodes
- D. 10 slave nodes
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You has a cluster running with the Fail Scheduler enabled. There are currently no jobs running on the cluster you submit a job A, so that only job A is running on the cluster. A while later, you submit job B.
Now job A and Job B are running on the cluster al the same time. How will the Fair' Scheduler handle these two Jobs?
- A. When job B gets submitted, Job A has to finish first, before job it can get scheduled.
- B. When job A gets submitted, it doesn't consume all the task slot
- C. When job A gets submitted, it consumes all the task slot
- D. When job B gets submitted, it will get assigned tasks, while job A continues to run with fewer tasks.
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Identity four pieces of cluster information that are stored on disk on the NameNode?
- A. The status of the heartbeats of each DataNode.
- B. File permissions of the files in HDFS.
- C. The directory structure of the files in HDFS.
- D. Names of the files in HDFS.
- E. An edit log of changes that have been made since the last snapshot of the NameNode.
- F. An edit log of changes that have been made since the last snapshot compaction by the Secondary NameNode.
- G. A catalog of DataNodes and the blocks that are stored on them.
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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. All Hard drives may be used to store HDFS blocks as long as at least 100GB in total is available on the node
- 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. 25 GB on each hard drive may not be used to store HDFS Blocks
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Which three file actions can execute as you write a file into HDFS?
- A. You can update the files contents
- B. You can index the file
- C. You can rename the file
- D. You can move the file
- E. You can delete the file
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