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Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:

1. Compare the hardware requirements of the NameNode with that of the DataNodes in a Hadoop cluster running MapReduce v1 (MRv1):

A) The NameNode requires less memory and less disk capacity than the DataNodes.
B) The NameNode and DataNodes should the same hardware configuration.
C) The NameNode requires more memory and no disk drives.
D) The NameNode requires more memory but less disk capacity.
E) The NameNode requires more memory and requires greater disk capacity than the DataNodes.

2. Which MapReduce daemon instantiates user code, and executes map and reduce tasks on a cluster running MapReduce v1 (MRv1)?

A) TaskTracker
B) ResourceManager
C) NameNode
D) JobTracker
E) ApplicationMaster
F) DataNode
G) NodeManager

3. In HDFS, you view a file with rw-r--r-- set as its permissions. What does this tell you about the file?

A) The file's contents can be modified by the owner, but no-one else
B) The file cannot be deleted by anyone but the owner
C) The file cannot be deleted by anyone
D) The file cannot be run as a MapReduce job
E) As a Filesystem in Userspace (FUSE), HDFS files are available to all user's on a cluster regardless of their underlying POSIX permissions.

4. In a cluster configured with HDFS High Availability (HA) but NOT HDFS federation, each map task run:

A) In the same Java Virtual Machine as the JobTracker.
B) In its own Java Virtual Machine.
C) In the same Java Virtual Machine as the DataNode.
D) In the same Java Virtual Machine as the TaskTracker

5. You configure Hadoop cluster with both MapReduce frameworks, MapReduce v1 (MRv1) and MapReduce v2 (MRv2/YARN). Which two MapReduce (computational) daemons do you need to configure to run on your master nodes?

A) ResourceManager
B) JournalNode
C) JobTracker
D) ApplicationMaster
E) NodeManager

Solutions: