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Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:

1. Cluster Summary
45 files and directories, 12 blocks = 57 total. Heap Size is 15.31 MB / 193.38MB(7%)

Refer to the above screenshot.
You configure the Hadoop cluster with seven DataNodes and the NameNode's web UI displays the details shown in the exhibit.
What does this tells you?

A) Your cluster has lost all HDFS data which had blocks stored on the dead DataNode.
B) The HDFS cluster is in the safe mode.
C) The DataNode JVM on one host is not active.
D) One physical host crashed.

2. What are the permissions of a file in HDFS with the following:rw-rw-r-x?

A) No one can modify the content of the file
B) the owner and group can read the file other can't
C) HDFS runs in user space which makes all users with access to the namespace able to read, write and modify all files
D) the owner and group can modify the contents of the file other can't
E) the owner and group cannot delete the file, but other can

3. 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) Journalnode
C) Nodemanager
D) Resourcemanager
E) Containermanager
F) Jobtracker

4. Identify two features/issues that MapReduce v2 (MRv2/YARN) is designed to address:

A) Standardize on a single MapReduce API.
B) HDFS latency.
C) Ability to run frameworks other than MapReduce, such as MPI.
D) Reduce complexity of the MapReduce APIs.
E) Resource pressure on the JobTrackr
F) Single point of failure in the NameNode.

5. Your developers request that you enable them to use Hive on your Hadoop cluster. What do install and/or configure?

A) Install the Hive interpreter on the master node running the JobTracker, and configure a shared remote Hive Metastore.
B) Install the Hive interpreter on the client machines only, and configure a shared remote Hive Metastore.
C) Install the Hive interpreter on the client machines and all nodes on the cluster
D) Install the Hive Interpreter on the client machines and all the slave nodes, and configure a shared remote Hive Metastore.

Solutions: