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Cloudera CCA-470 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Cluster Installation and Configuration | - Cluster setup and node management - Installing and configuring CDH4 components |
| HDFS Administration | - NameNode and DataNode management - HDFS architecture and data replication |
| MapReduce and Job Management | - Job execution and scheduling - Troubleshooting failed jobs |
| Cluster Maintenance and Monitoring | - Monitoring cluster health and performance - Log analysis and debugging |
| Hadoop and CDH Architecture | - CDH4 architecture overview and services - Hadoop ecosystem components (HDFS, MapReduce) |
| Upgrade and Migration (CDH4 focus) | - Upgrading CDH components - Compatibility and migration considerations |
Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH) Sample Questions:
Question 1
You are a Hadoop cluster with a NameNode on host mynamenode. What are two ways to determine available HDFS space in your cluster?
A. Connect to http://mynamemode:50070/ and locate the DFS Remaining value.
B. Run hadoop dfsadmin -SpaceQuota and subtract HDFS Used from Configured Capacity.
C. Run hadoop dfsadmin -report and locate the DFS Remaining value.
D. Run hadoop fs -du/and locate the DFS Remaining value.
Question 2
Which MapReduce v2 (MR2/YARN) daemon is a per-machine slave responsible for launching application containers and monitoring application resources usage?
A. ApplicationMasterService
B. ApplicationMaster
C. TaskTracker
D. ResourceManager
E. JobTracker
F. NodeManager
Question 3
On a cluster running MapReduce v1 (MRv1), a MapReduce job is given a directory of 10 plain text as its input directory. Each file is made up of 3 HDFS blocks. How many Mappers will run?
A. 1
B. We cannot say; the number of Mappers is determined by the developer
C. 30
D. 10
Question 4
What do you need to do when adding new slave nodes to a cluster?
A. Add a new entry to /etc/slavenodes on the NameNode host.
B. add the new node's DNS name to the conf/slaves file on the master node.
C. Restart the NameNode daemon.
D. Halt and resubmit any running MapReduce jobs to guarantee correctness.
E. Increase the value of dfs.number.of.nodes in hdfs-site.xml.
Question 5
Which daemon spawns child JVMs to perform MapReduce processing?
A. NameNode
B. TaskTracker
C. DataNode
D. JobTracker
E. Secondary NameNode
Solutions:
| Question 1 Answer: C,D | Question 2 Answer: B | Question 3 Answer: C | Question 4 Answer: B | Question 5 Answer: B |
