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Cloudera CCA-410 Exam Syllabus Topics:

Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:

1. Once a client application validates its identity and is granted access to file in a cluster. What is the reminder of read path back to the client?

A) The namenode maps the read request against the block locations in it's stored metadata the block id's are stored by their distance to the client and moved to the datanode closest to the client according to hadoop rac topology. The client application then reads the blocks from the single datanode
B) the namenode maps the read request against the block locations in its stored metadata and reads those blocks from the datanodes. The client applications then read the block from the namenode
C) The namenode gives the client the block ID's and a list of Datanodes on which those blocks are found. And the application reads the block directly from the datanodes

2. You configure your hadoop development cluster with both mapreduce frameworks, mapreduceV1 (MRv1) and mapreduce v2 (MRv2/YARN). You plan to run only one set of mapreduce daemons at a time in this development environment (running both simultaneously results in an unsuitable cluster but configure in both moving between them is fine). Which two mapreduce (capitation) daemons do you need to configure to run on your masternodes?

A) Nodemanager
B) Resourcemanager
C) Jobtracker
D) Containermanager
E) Applicationmaster
F) Journalnode

3. The most important consideration for slave nodes in a Hadoop cluster running production jobs that require short turnaround times is:

A) The ratio between the number of processor cores and total storage capacity.
B) The ratio between the amount of memory and the number of disk drives.
C) The ratio between the number of processor cores and number of disk drives.
D) The ratio between the number of processor cores and the amount of memory.
E) The ratio between the amount of memory and the total storage capacity.

4. You have a cluster running 32 slave nodes and 3 master nodes running mapreduce V1 (MRv1). You execute the command:
$ hadoop fsck /
What four cluster conditions running this command will return to you?

A) Number of dead datanodes
B) Under-replicated blocks
C) The current state of the file system returned from scanning individual blocks on each datanode
D) the location for every block
E) Configure capacity of your cluster
F) the current state of the file system according to the namenode
G) Blocks replicated improperly or that don't satisfy your cluster enhancement policy (e. g. , too many blocks replicated on the same node)
H) Number of datanodes

5. What is the smallest number of slave nodes you would need to configure in your hadoop cluster to
store 100TB of data, using Hadoop default replication values, on nodes with 10TB of RAW disk space per node?

A) 100
B) 40
C) 25
D) 75
E) 10

Solutions: