Category: HDFS Administration and Maintenance

__________ is a generalization of the facility provided by the MapReduce framework to collect data output by the Mapper or the Reducer.

administrator
__________ is a generalization of the facility provided by the MapReduce framework to collect data output by the Mapper or the Reducer.
OutputCollector
Excellent ! Your Answer is Correct. Explanation: Hadoop MapReduce comes bundled with a library of generally useful mappers, reducers, and partitioners.
Partitioner
Reporter
All Options are Correct

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Which of the following is a common reason to restart hadoop process?

administrator
Which of the following is a common reason to restart hadoop process?
All Options are Correct
Excellent ! Your Answer is Correct. Explanation: The most common reason administrators restart Hadoop processes is to enact configuration changes.
Upgrade Hadoop
React to incidents
Remove worker nodes

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NameNode is monitored and upgraded in a __________ transition.

administrator
NameNode is monitored and upgraded in a __________ transition.
securemode
Excellent ! Your Answer is Correct. Explanation: The HDFS service has some unique functions that may result in additional information on its Status and Instances pages.
safemode
servicemode
None of the Option is Correct

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__________ is a standard Java API for monitoring and managing applications.

administrator
__________ is a standard Java API for monitoring and managing applications.
JMX
Excellent ! Your Answer is Correct. Explanation: Hadoop includes several managed beans (MBeans), which expose Hadoop metrics to JMX-aware applications.
JVM
JVX
None of the Option is Correct

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Which of the tab shows all the role instances that have been instantiated for this service?

administrator
Which of the tab shows all the role instances that have been instantiated for this service?
Instance
Excellent ! Your Answer is Correct. Explanation: The Instances page displays the results of the configuration validation checks it performs for all the role instances for this service.
Status
Service
All Options are Correct

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__________ Manager’s Service feature monitors dozens of service health and performance metrics about the services and role instances running on your cluster.

administrator
__________ Manager’s Service feature monitors dozens of service health and performance metrics about the services and role instances running on your cluster.
Cloudera
Excellent ! Your Answer is Correct. Explanation: Manager’s Service feature presents health and performance data in a variety of formats.
Microsoft
Amazon
None of the Option is Correct

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Which of the following is a configuration management system?

administrator
Which of the following is a configuration management system?
Puppet
Excellent ! Your Answer is Correct. Explanation: Administrators may use configuration management systems such as Puppet and Chef to manage processes.
Alex
Acem
None of the Option is Correct

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___________ mode allows you to suppress alerts for a host, service, role, or even the entire cluster.

administrator
___________ mode allows you to suppress alerts for a host, service, role, or even the entire cluster.
Maintenance
Excellent ! Your Answer is Correct. Explanation: Maintenance mode can be useful when you need to take actions in your cluster and do not want to see the alerts that will be generated due to those actions.
Safe
Secure
All Options are Correct

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Point out the correct statement.

administrator
Point out the correct statement.
Hadoop is designed to be a highly redundant distributed system
Excellent ! Your Answer is Correct. Explanation: Hadoop deployment is sometimes difficult to implement.
RAID is turned off by default
Hadoop has a networked configuration system
None of the Option is Correct

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Which of the following is a common hadoop maintenance issue?

administrator
Which of the following is a common hadoop maintenance issue?
Lack of configuration management
Excellent ! Your Answer is Correct. Explanation: Without a centralized configuration management framework, you end up with a number of issues that can cascade just as your usage picks up.
Lack of tools
Lack of web interface
None of the Option is Correct

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