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Cloudera CCA-470 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Cluster Maintenance & Upgrades | 10% | - Backup and recovery procedures - Performing rolling upgrades |
| Security & Data Management | 15% | - Security enhancements in CDH4 - HDFS optimization and maintenance - Data ingestion with Flume and Sqoop |
| CDH4 Architecture & New Features | 25% | - HDFS high availability enhancements - YARN architecture and resource management - MapReduce v2 vs MapReduce v1 differences |
| Installation & Configuration | 25% | - Cloudera Manager integration and configuration - Configuring core services in CDH4 - Upgrading clusters from CDH3 to CDH4 |
| Cluster Administration & Operations | 25% | - Managing resources with YARN schedulers - Monitoring CDH4 clusters and services - Troubleshooting common CDH4 issues |
Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH) Sample Questions:
In the context of configuring a Hadoop cluster for HDFS High Availability (HA), 'fencing' refers to:
- A. Isolating both HA NameNodes to prevent a client application from killing the NameNode daemons.
- B. Isolating the standby NameNode from write access to the fsimage and edits files.
- C. Isolating a failed NameNode from write access to the fsimage and edits files so that is cannot resume write operations if it recovers.
- D. Isolating the cluster's master daemon to limit write access only to authorized clients.
Explanation: Only visible for Test4Engine members. You can sign-up / login (it's free).
You've configured your cluster with HDFS Federation. One NameNode manages the /data namesapace and another Name/Node manages the /reports namespace. How do you configure a client machine to access both the /data and the /reports directories on the cluster?
- A. Configure the client to mount the /data namespace. As long as a single namespace is mounted and the client participates in the cluster, HDFS grants access to all files in the cluster to that client.
- B. Configure the client to mount both namespaces by specifying the appropriate properties in the core-site.xml
- C. You cannot configure a client to access both directories in the current implementation of HDFS Federation.
- D. You don't need to configure any parameters on the client machine. Access is controlled by the NameNodes managing the namespace.
Explanation: Only visible for Test4Engine members. You can sign-up / login (it's free).
For a MapReduce job, what's the relationship between tasks and task attempts?
- A. There are always at least as many task attempts as there are tasks.
- B. There are always at most as many task attempts as there are tasks.
- C. There are always exactly as many task attempts as there are tasks.
Which three processes does HDFS High Availability (HA) enable on your cluster?
- A. Automatically 'fail over' between NameNodes if one goes down
- B. Write data to two clusterssimultaneously
- C. Manually 'fail over' between NameNodes
- D. Shut one NameNode down for maintenance without halting the cluster
- E. Configure unlimited hot standby NameNode.
Explanation: Only visible for Test4Engine members. You can sign-up / login (it's free).
The failure of which daemon makes HDFS unavailable on a cluster running MapReduce v1 (MRv1)?
- A. Application Manager
- B. NameNode
- C. DataNode
- D. Node Manager
- E. Resource Manager
- F. Secondary NameNode
Explanation: Only visible for Test4Engine members. You can sign-up / login (it's free).
