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Updated: Aug 31, 2025
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Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH) Sample Questions:
1. Identify which two daemons typically run each slave node in a Hadoop cluster running MapReduce v1 (MRv1)
A) NameNode
B) TaskTracker
C) Secondary NameNode
D) JobTracker
E) DataNode
F) NodeManager
2. How does the NameNode know DataNodes are available on a cluster running MapReduce v1 (MRv1)
A) DataNodes listed in the dfs.hosts file. The NameNode uses as the definitive list of available DataNodes.
B) DataNodes heartbeat in the master on a regular basis.
C) The NameNode broadcasts a heartbeat on the network on a regular basis, and DataNodes respond.
D) The NameNode send a broadcast across the network when it first starts, and DataNodes respond.
3. 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.
4. Compare the hardware requirements of the NameNode with that of the DataNodes in a Hadoop cluster running MapReduce v1 (MRv1):
A) The NameNode and DataNodes should the same hardware configuration.
B) The NameNode requires more memory but less disk capacity.
C) The NameNode requires more memory and no disk drives.
D) The NameNode requires more memory and requires greater disk capacity than the DataNodes.
E) The NameNode requires less memory and less disk capacity than the DataNodes.
5. Choose three reasons why should you run the HDFS balancer periodically?
A) To ensure that there is capacity in HDFS tor additional data.
B) To help HDFS deliver consistent performance under heavy loads.
C) To improve data locality for MapReduce tasks.
D) To ensure that all blocks in the cluster are 128MB in size.
E) To ensure that there is consistent disk utilization across the DataNodes.
Solutions:
| Question # 1 Answer: B,E | Question # 2 Answer: B | Question # 3 Answer: C | Question # 4 Answer: B | Question # 5 Answer: B,C,E |
All CCA-470 exam subjects are from your Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam dumps.
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