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Cloudera CCA-470 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Installation & Configuration | 25% | - Upgrading clusters from CDH3 to CDH4 - Configuring core services in CDH4 - Cloudera Manager integration and configuration |
| Cluster Administration & Operations | 25% | - Monitoring CDH4 clusters and services - Troubleshooting common CDH4 issues - Managing resources with YARN schedulers |
| Cluster Maintenance & Upgrades | 10% | - Performing rolling upgrades - Backup and recovery procedures |
| Security & Data Management | 15% | - Security enhancements in CDH4 - HDFS optimization and maintenance - Data ingestion with Flume and Sqoop |
| CDH4 Architecture & New Features | 25% | - MapReduce v2 vs MapReduce v1 differences - YARN architecture and resource management - HDFS high availability enhancements |
Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH) Sample Questions:
You have a cluster running with the Fair in Scheduler enabled. There are currently no jobs running on the cluster, and 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 at the same time.
Which of the following describes how the Fair Scheduler operates? (Choose 2)
- A. When job B gets submitted, job A has to finish first, before job B can get scheduled.
- B. When job A gets submitted, it doesn't consume all the task slots.
- C. When job B gets submitted, it will get assigned tasks, while job A continues to run with fewer tasks.
- D. When job A gets submitted, it consumes all the task slots.
Correct Answer: A,D 🗳️
Explanation: Only visible for TestPassed members. You can sign-up / login (it's free).
Compare the hardware requirements of the NameNode with that of the DataNodes in a Hadoop cluster:
- A. The NameNode requires more memory and no disk drives.
- B. The NameNode requires more memory and requires greater disk capacity than the DataNodes.
- C. The NameNode requires more memory but less disk capacity.
- D. The NameNode and DataNodes should have the same hardware configuration.
- E. The NameNode requires less memory and fewer number of disk drives than the DataNodes.
Correct Answer: C 🗳️
Explanation: Only visible for TestPassed members. You can sign-up / login (it's free).
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. Any machine running the DataNode daemon can immediately join the cluster.
- C. Presented with a blank dfs.hosts property, the NameNode will permit DataNodes specified in mapred.hosts to join the cluster.
- D. No new can be added to the cluster until you specify them in the dfs.hosts file.
Correct Answer: D 🗳️
Explanation: Only visible for TestPassed members. You can sign-up / login (it's free).
Which three distcp features can you utilize on a Hadoop cluster?
- A. Use distcp to copy HBase table files.
- B. Use distcp to run an internal MapReduce job to copy files.
- C. Use distcp to copy data between directories inside the same cluster.
- D. Use distcp to copy files only between two clusters or more. You cannot use distcp to copy data between directories inside the same cluster.
- E. Use distcp to copy physical blocks from the source to the target destination in your cluster.
Correct Answer: A,B,C 🗳️
Explanation: Only visible for TestPassed members. You can sign-up / login (it's free).
You have a cluster running with the FIFO scheduler enabled. You submit a large job A to the
cluster which you expect to run for one hour. Then, you submit job B to the cluster, which you expect to run a couple of minutes only. Let's assume both jobs are running at the same priority.
How does the FIFO scheduler execute the jobs? (Choose 3)
- A. Given jobs A and B submitted in that order, all tasks from job A will be scheduled before all tasks from job B.
- B. The order of execution of tasks within a job may vary.
- C. Since job B needs only a few tasks, if might finish before job A completes.
- D. When a job is submitted, all tasks belonging to that job are scheduled.
Correct Answer: A,B,D 🗳️
Explanation: Only visible for TestPassed members. You can sign-up / login (it's free).
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