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Cloudera CCA-470 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: CDH4 Architecture & New Features | 25% | - YARN architecture and resource management - MapReduce v2 vs MapReduce v1 differences - HDFS high availability enhancements |
| Topic 2: Cluster Administration & Operations | 25% | - Managing resources with YARN schedulers - Troubleshooting common CDH4 issues - Monitoring CDH4 clusters and services |
| Topic 3: Cluster Maintenance & Upgrades | 10% | - Performing rolling upgrades - Backup and recovery procedures |
| Topic 4: Security & Data Management | 15% | - Security enhancements in CDH4 - Data ingestion with Flume and Sqoop - HDFS optimization and maintenance |
| Topic 5: Installation & Configuration | 25% | - Upgrading clusters from CDH3 to CDH4 - Cloudera Manager integration and configuration - Configuring core services in CDH4 |
Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH) Sample Questions:
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. You cannot configure a client to access both directories in the current implementation of HDFS Federation.
- C. You don't need to configure any parameters on the client machine. Access is controlled by the NameNodes managing the namespace.
- D. Configure the client to mount both namespaces by specifying the appropriate properties in the core-site.xml
Correct Answer: B 🗳️
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You are running a Hadoop cluster with all monitoring facilities properly configured. Which scenario will go undetected?
- A. Map or reduce tasks that are stuck in an infinite loop.
- B. A DataNode is disconnected from the cluster.
- C. MapReduce jobs that are causing excessive memory swaps.
- D. HDFS is almost full.
- E. The NameNode goes down.
Correct Answer: A 🗳️
In the context of configuring a Hadoop cluster for HDFS High Availability (HA), 'fencing' refers to:
- A. Isolating a failed NameNode from write access to the fsimage and edits files so that is cannot resume write operations if it recovers.
- B. Isolating both HA NameNodes to prevent a client application from killing the NameNode daemons.
- C. Isolating the cluster's master daemon to limit write access only to authorized clients.
- D. Isolating the standby NameNode from write access to the fsimage and edits files.
Correct Answer: A 🗳️
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How must you format the underlying filesystem of your Hadoop cluster's slave nodes running on Linux?
- A. They must be formatted as HDFS
- B. They must not be formatted - - HDFS will format the filesystem automatically
- C. They must be formatted as either ext3 or ext4
- D. They may be formatted in nay Linux filesystem
Correct Answer: C 🗳️
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In a cluster configured with HDFS High Availability (HA) but NOT HDFS federation, each map task run:
- A. In its own Java Virtual Machine.
- B. In the same Java Virtual Machine as the JobTracker.
- C. In the same Java Virtual Machine as the DataNode.
- D. In the same Java Virtual Machine as the TaskTracker
Correct Answer: A 🗳️
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