1. Which of the following is a common hadoop maintenance issue?
a) Lack of tools
b) Lack of configuration management
c) Lack of web interface
d) None of the mentioned
Explanation: Without a centralized configuration management framework, you end up with a number of issues that can cascade just as your usage picks up.
2. Point out the correct statement.
a) RAID is turned off by default
b) Hadoop is designed to be a highly redundant distributed system
c) Hadoop has a networked configuration system
d) None of the mentioned
Explanation: Hadoop deployment is sometimes difficult to implement.
3. ___________ mode allows you to suppress alerts for a host, service, role, or even the entire cluster.
a) Safe
b) Maintenance
c) Secure
d) All of the mentioned
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.
4. Which of the following is a configuration management system?
a) Alex
b) Puppet
c) Acem
d) None of the mentioned
Explanation: Administrators may use configuration management systems such as Puppet and Chef to manage processes.
5. Point out the wrong statement.
a) If you set the HBase service into maintenance mode, then its roles (HBase Master and all Region Servers) are put into effective maintenance mode
b) If you set a host into maintenance mode, then any roles running on that host are put into effective maintenance mode
c) Putting a component into maintenance mode prevent events from being logged
d) None of the mentioned
Explanation: Maintenance mode only suppresses the alerts that those events would otherwise generate.
6. Which of the following is a common reason to restart hadoop process?
a) Upgrade Hadoop
b) React to incidents
c) Remove worker nodes
d) All of the mentioned
Explanation: The most common reason administrators restart Hadoop processes is to enact configuration changes.
7. __________ Manager’s Service feature monitors dozens of service health and performance metrics about the services and role instances running on your cluster.
a) Microsoft
b) Cloudera
c) Amazon
d) None of the mentioned
Explanation: Manager’s Service feature presents health and performance data in a variety of formats.
8. Which of the tab shows all the role instances that have been instantiated for this service?
a) Service
b) Status
c) Instance
d) All of the mentioned
Explanation: The Instances page displays the results of the configuration validation checks it performs for all the role instances for this service.
9. __________ is a standard Java API for monitoring and managing applications.
a) JVX
b) JVM
c) JMX
d) None of the mentioned
Explanation: Hadoop includes several managed beans (MBeans), which expose Hadoop metrics to JMX-aware applications.
10. NameNode is monitored and upgraded in a __________ transition.
a) safemode
b) securemode
c) servicemode
d) none of the mentioned
Explanation: The HDFS service has some unique functions that may result in additional information on its Status and Instances pages.