Cloudera : CCA-470 Questions & Answers
Updated: May 30, 2026
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Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH) Sample Questions:
1. Your cluster has nodes in seven racks, and you have provided a rack topology script. What is Hadoop's block placement policy, assuming a block replication factor of three?
A) One copy of the block is written to a node in each of three racks
B) All three of the block are written to nodes on the same rack
C) Because there are seven racks the block is written to a node on each rack
D) One copy of the block is written to a node in one rack; two copies are written to two nodes in a different rack
2. What is the recommended disk configuration for slave nodes in your Hadoop cluster with 6 x 2 TB hard drives?
A) RAID 1+0
B) RAID 5
C) RAID 10
D) JBOD
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) 30
B) 10
C) We cannot say; the number of Mappers is determined by the developer
D) 1
4. Your Hadoop cluster has 12 slave nodes, a block size set to 64MB, and a replication factor of three.
Choose which best describes how the Hadoop Framework distributes block writes into HDFS from a Reducer outputting a 150MB file?
A) The slave node on which the Reducer runs gets the first copy of every block written. Other block replicas will be placed on other nodes.
B) The Reducer will generate twelve blocks and write them to slave nodes nearest the node on which the Reducer runs.
C) Reducers don't write blocks into HDFS
D) The Reducer will generate nine blocks and write them randomly to nodes throughout the cluster.
5. Which of the following scenarios makes HDFS unavailable?
A) DataNode failure
B) Secondary NameNode failure
C) NameNode failure
D) TaskTracker failure
E) JobTracker failure
Solutions:
| Question # 1 Answer: D | Question # 2 Answer: D | Question # 3 Answer: A | Question # 4 Answer: A | Question # 5 Answer: A |
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