Try Cloudera : CCA-470 valid & accurate questions and answers
Updated: Aug 31, 2025
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Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH) Sample Questions:
1. A client wants to read a file from HDFS. How does the data get from the DataNodes to the client?
A) The NameNode reads the blocks from the DataNodes, and caches them. Then, the application reads the blocks from the NameNode.
B) The application reads the blocks directly from the DataNodes.
C) The blocks are sent to a single DataNode, then the application reads the blocks from that Data Node.
2. You set up the Hadoop cluster using NameNode Federation. One NameNode manages the/users namespace and one NameNode manages the/data namespace. What happens when client tries to write a file to/reports/myreport.txt?
A) The file successfully writes to /report/myreport.txt. The metadata for the file is managed by the first NameNode to which the client connects.
B) The file successfully writes to /users/reports/myreports/myreport.txt.
C) The client throws an exception.
D) The file writes fails silently; no file is written, no error is reported.
3. What information is stored on disk on the NameNode? (Choose 4)
A) The directory structure of the files in HDFS.
B) The status of the heartbeats of each DataNode.
C) An edit log of changes that have been made since the last backup of the NameNode.
D) Names of the files in HDFS.
E) A catalog of DataNodes and the blocks that are stored on them.
F) File permissions of the files in HDFS.
G) An edit log of changes that have been made since the last snapshot compaction by the Secondary NameNode.
4. Which MapReduce daemon instantiates user code, and executes map and reduce tasks on a cluster running MapReduce v1 (MRv1)?
A) DataNode
B) ApplicationMaster
C) ResourceManager
D) NameNode
E) TaskTracker
F) NodeManager
G) JobTracker
5. What do you need to do when adding new slave nodes to a cluster?
A) add the new node's DNS name to the conf/slaves file on the master node.
B) Halt and resubmit any running MapReduce jobs to guarantee correctness.
C) Increase the value of dfs.number.of.nodes in hdfs-site.xml.
D) Add a new entry to /etc/slavenodes on the NameNode host.
E) Restart the NameNode daemon.
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: A | Question # 3 Answer: A,D,E,G | Question # 4 Answer: E | Question # 5 Answer: A |
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