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Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH): CCA-470 Exam
"Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH)", also known as CCA-470 exam, is a Cloudera Certification. With the complete collection of questions and answers, BraindumpsPass has assembled to take you through 87 Q&As to your CCA-470 Exam preparation. In the CCA-470 exam resources, you will cover every field and category in CCAH Certification helping to ready you for your successful Cloudera Certification.
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Cloudera CCA-470 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Cluster Maintenance & Upgrades | 10% | - Backup and recovery procedures - Performing rolling upgrades |
| Topic 2: Installation & Configuration | 25% | - Upgrading clusters from CDH3 to CDH4 - Configuring core services in CDH4 - Cloudera Manager integration and configuration |
| Topic 3: CDH4 Architecture & New Features | 25% | - YARN architecture and resource management - HDFS high availability enhancements - MapReduce v2 vs MapReduce v1 differences |
| Topic 4: Security & Data Management | 15% | - Data ingestion with Flume and Sqoop - Security enhancements in CDH4 - HDFS optimization and maintenance |
| Topic 5: Cluster Administration & Operations | 25% | - Troubleshooting common CDH4 issues - Managing resources with YARN schedulers - Monitoring CDH4 clusters and services |
Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH) Sample Questions:
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, it will get assigned tasks, while job A continues to run with fewer tasks.
- B. When job A gets submitted, it consumes all the task slot
- C. When job B gets submitted, Job A has to finish first, before job it can get scheduled.
- D. When job A gets submitted, it doesn't consume all the task slot
Answer: A
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You are running a Hadoop cluster with NameNode on host mynamenode, a secondary NameNode on host mysecondary and DataNodes.
Which best describes how you determine when the last checkpoint happened?
- A. Connect to the web UI of the Secondary NameNode (http://mysecondarynamenode:50090) and look at the "Last Checkpoint" information
- B. Execute hdfs dfsadmin -saveNameSpace on the command line which returns to you the last checkpoint value in fstime file.
- C. Connect to the web UI of the NameNode (http://mynamenode:50070/) and look at the "Last Checkpoint" information
- D. Execute hdfs dfsadmin -report on the command line in and look at the Last Checkpoint information.
Answer: A
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You configure Hadoop cluster with both MapReduce frameworks, MapReduce v1 (MRv1) and MapReduce v2 (MRv2/YARN). Which two MapReduce (computational) daemons do you need to configure to run on your master nodes?
- A. ApplicationMaster
- B. NodeManager
- C. JournalNode
- D. ResourceManager
- E. JobTracker
Answer: A,D
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Identify the function performed by the Secondary NameNode daemon on a cluster configured to run with a single NameNode.
- A. In this configuration, the Secondary NameNode performs deal-time backups of the NameNode.
- B. In this configuration, the Secondary NameNode performs a checkpoint operation on the files by the NameNode.
- C. In this configuration, the Secondary NameNode servers as alternate data channel for clients to reach HDFS, should the NameNode become too busy.
- D. In this configuration, the Secondary NameNode is standby NameNode, ready to failover and provide high availability.
Answer: B
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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 will all be multiples of 64M
- B. The block size of files in the duster will all at least be 64MB.
- C. The block size of files in the cluster can be determined as the block is written.
- D. The block size of files in the cluster will all be the exactly 64MB.
Answer: D
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