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Cloudera CCA-410 Exam Syllabus Topics:

Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:

1. You set the value of dfs.block.size to 64MB in hdfs-site.xml on a client machine, but you set the same property to 128MB on your clusters name node. What happens when the client writes a file to HDFS?

A) The file will be written successfully with a block size of 64MB but client attempting to read the file will fail because the namenode believes the blocks to be 128MB in size
B) A block size of 64MB will be used
C) An execution will be thrown when the client attempts to write the file, because the values are different.
D) A block size of 128MB will be used

2. Which two daemons must be installed on master nodes in hadoop cluster running mapreduce V1 (MRV1)?

A) Tasktracker
B) Resourcemanager
C) Zookeeper
D) Datanode
E) Hmaster
F) ApplicationMaster
G) Namenode

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) 10
B) We cannot say; the number of Mappers is determined by the developer
C) 1
D) 30

4. Which two updates occur when a client application opens a stream to begin a file write on a cluster running MapReduce v1 (MRv1)?

A) The change is written to the NameNode disk.
B) The metadata in the RAM on the NameNode is flushed to disk.
C) The metadata in RAM on the NameNode is flushed disk.
D) The metadata in RAM on the NameNode is updated.
E) Once the write stream closes on the DataNode, the DataNode immediately initiates a black report to the NameNode.
F) The change is written to the edits file.

5. Using hadoop's default settings, how much data will be able to store on your hadoop cluster if it is has 12 nodes with 4TB raw diskspace per node allocated to HDFS storage?

A) Approximately 3TB
B) Approximately 12TB
C) Approximately 16TB
D) Approximately 48TB

Solutions: