Online Access Free CCA-410 Exam Questions

For each job, the Hadoop framework generates task log files. Where are Hadoop's task log files stored?

• A.On the local disk of the slave node running the task.
• B.In HDFS, in the directory of the user who generates the job.
• C.Cached on the local disk of the slave node running the task, then copied into HDFS.
• D.Cached on the local disk of the slave node running the task, then purged immediately upon task completion.

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 12TB
• B.Approximately 48TB
• C.Approximately 3TB
• D.Approximately 16TB

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.1
• C.We cannot say; the number of Mappers is determined by the developer
• D.10

Identity four pieces of cluster information that are stored on disk on the NameNode?

• A.An edit log of changes that have been made since the last snapshot compaction by the Secondary NameNode.
• B.A catalog of DataNodes and the blocks that are stored on them.
• C.The directory structure of the files in HDFS.
• D.Names of the files in HDFS.
• E.File permissions of the files in HDFS.
• F.The status of the heartbeats of each DataNode.
• G.An edit log of changes that have been made since the last snapshot of the NameNode.

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.Reducers don't write blocks into HDFS
• B.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.
• C.The Reducer will generate twelve blocks and write them to slave nodes nearest the node on which the Reducer runs.
• D.The Reducer will generate nine blocks and write them randomly to nodes throughout the cluster.