Cloudera CCA-410 Exam : Cloudera Certified Administrator for Apache Hadoop CDH4

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Cloudera CCA-410 Exam Syllabus Topics:

Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:

1. How many mappers required for a map reduce, job determine on a cluster running map reduce V1 (MRv1)?

A) The number of mappers is calculated by namenode based on the number of HDFS blocks in the files
B) the jobtracker chooses the number based on no of available nodes
C) The number mappers is equal to no of input splits calculated by client submitting
D) the developer specifies the number in the job configuration

2. Using cloudera manager on CDH4 cluster running mapreduce V1(MRv1), you delete a tasktracker role instance from a host that also a runs a datanode role instance and a region server role instance.cloudera
Manager make changes to the cluster and prompts you to the accept the changes.
What other configuration option will cloudera manager automatically prompt you to change?

A) The option to change java maximum heap sizes for the other role instances
B) the option to immediately rebalance the cluster
C) The option to failover to the instance by namenode
D) the option to specify an alternate slave host to place the received data node role instance

3. Identify four characteristics of a 300MB file that has been written to HDFS with block size of 128MB and all other Hadoop defaults unchanged?

A) The third block will be 64MB
B) Each block will be replicated nine times
C) Each block will be replicated three times
D) The third Initial block will be 44 MB
E) All three blocks will be 128MB
F) Two of the initial blocks will be 128MB
G) The file will be split into three blocks when initially written into the cluster
H) The file will consume 1152MB of space in the cluster

4. 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) All three of the block are written to nodes on the same rack
B) Because there are seven racks the block is written to a node on each rack
C) One copy of the block is written to a node in each of three racks
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

5. Your company stores user profile records in an OLTP database. You want to join these records with webserver logs. You have already ingested into the hadoop file system. What is the best way to obtain and ingest these user records?

A) Ingest with flume agents
B) Ingest with SQL import
C) Ingest with Pig's Load Command
D) Ingest with hadoop streaming
E) Ingest using the HDFS put command
F) Ingest using hives LOAD DATA command

Solutions: