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Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:

1. How do you access the long messages a mapreduce application generates after you run it on your cluster?

A) You browse the /logs directly in HDFS where all jobs log files as store
B) You connect to the job tracker web UI and locate the details for your job this will include long messages
C) You remotely log in to any slave node in the cluster to browse your jobs log files in/var/log/hadoop/archive directly
D) You browse the currect working directory of the client machine from which You submitted the job

2. Your running a hadoop cluster with a name node on the host mynamenode.
What are two ways you can determine available HDFS space in your cluster?

A) Run hadoop DFSAdmin -spaceQuota and subtract DFS used % from configured capacity
B) Run hadoop dfsadmin - report and locate the DFS remaming value
C) Connect to http://mynamenode:50070/and locate the dfs remaining value
D) Run hadoop fs -du / and locate the dfs remaining value

3. You install Cloudera Manager on a cluster where each host has 1 GB of RAM. All of the services show their status as concerning. However, all jobs submitted complete without an error.
Why is Cloudera Manager showing the concerning status KM the services?

A) DataNode service instance has crashed.
B) The slave nodes are swapping.
C) A slave node's disk ran out of space
D) The slave nodes, haven't sent a heartbeat in 60 minutes

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

5. Under which scenario would it be most appropriate to consider using faster (e.g 10 Gigabit) Ethernet as the network fabric for your Hadoop cluster?

A) When the typical workloads consists of processor-intensive tasks.
B) When the typical workloads consumes a large amount of input data, relative to the entire capacity of HDFS.
C) When the typical workloads generates a large amount of intermediate data, on the order of the input data itself.
D) When the typical workloads generates a large amount of output data, significantly larger than the amount of intermediate data.

Solutions: