1. What is Nagios?
A) A web server
B) A network monitoring tool
C) An operating system
D) A database management system
Answer: B
2. What is the purpose of Nagios?
A) Email client
B) Network discovery
C) System monitoring and alerting
D) Web development
Answer: C
3. Which programming language is Nagios written in?
A) Python
B) Ruby
C) Perl
D) Java
Answer: C
4. What is the configuration file in Nagios for defining hosts and services?
A) nagios.cfg
B) hosts.cfg
C) services.cfg
D) nagios.conf
Answer: B
5. Which command is used to check the Nagios configuration for errors?
A) nagios check
B) nagios -C
C) nagios -v
D) check_nagios
Answer: C
6. What is the primary benefit of using Nagios plugins?
A) They provide a user interface for Nagios.
B) They extend Nagios functionality by adding new features.
C) They automate the installation of Nagios.
D) They improve Nagios security.
Answer: B
7. Which component of Nagios is responsible for executing host and service checks?
A) Nagios Core
B) Nagios UI
C) Nagios Plugins
D) Nagios Scheduler
Answer: A
8. What is the main role of the Nagios NRPE plugin?
A) Network discovery
B) Remote execution of plugins on client machines
C) Web interface for Nagios
D) Log file analysis
Answer: B
9. Which Nagios command is used to schedule a downtime for a host or service?
A) schedule_downtime
B) set_downtime
C) downtime
D) enable_downtime
Answer: A
10. What does the "max_check_attempts" directive in a host or service definition specify?
A) The maximum number of hosts in the network
B) The number of times Nagios will check the host or service before considering it as a problem
C) The number of plugin checks to be executed
D) The maximum time a host can be down before an alert is sent
Answer: B
11. What is a passive check in Nagios?
A) A check performed automatically by Nagios
B) A check that doesn't require a response from the monitored device
C) A check initiated by the monitored device
D) A check performed only during business hours
Answer: B
12. Which Nagios component is responsible for sending notifications when a problem is detected?
A) Nagios UI
B) Nagios Scheduler
C) Nagios Notification Daemon (NND)
D) Nagios Core
Answer: C
13. Which notification command is used to send email notifications in Nagios?
A) send_email
B) notify_email
C) notify-host-by-email
D) send_notification
Answer: C
14. What is the purpose of the "notification_interval" directive in Nagios?
A) The interval between plugin checks
B) The interval between consecutive notifications for a problem
C) The interval for acknowledging a problem
D) The interval for scheduling downtime
Answer: B
15. Which command is used to acknowledge a problem in Nagios?
A) acknowledge_problem
B) ack
C) acknowledge-host
D) acknowledge_service
Answer: D
16. What is the role of the Nagios "check_external_command" directive?
A) It allows external commands to be run on the Nagios server.
B) It checks for external services on the monitored hosts.
C) It sends commands to the Nagios scheduler.
D) It is not a valid directive.
Answer: A
17. What is the purpose of the "event_handler" directive in Nagios?
A) To define a handler for notifications
B) To execute an external command in response to a problem
C) To define custom host checks
D) To set up a command for scheduling downtime
Answer: B
18. Which of the following is a Nagios web interface that provides additional features and reporting capabilities?
A) Nagios Dashboard
B) Nagios Web
C) Nagios Core
D) Nagios Extended
Answer: B
19. What does the Nagios Core Configuration CGI provide?
A) A command-line interface for Nagios configuration
B) A graphical interface for configuring Nagios Core
C) A log viewer
D) A real-time dashboard
Answer: B
20. Which of the following is not a valid Nagios status code for a host or service?
A) OK
B) CRITICAL
C) WARN
D) IN_PROGRESS
Answer: D
21. Which Nagios component is responsible for storing historical status and performance data?
A) Nagios RRDTool
B) Nagios Archive
C) Nagios Database
D) Nagios Perfdata
Answer: A
22. What is the default port for the Nagios web interface?
A) 80
B) 443
C) 5665
D) 8080
Answer: A
23. What is the purpose of the "use" directive in Nagios configuration?
A) To specify the username for notifications
B) To define a custom service check
C) To inherit settings from another host or service definition
D) To schedule downtime for a host
Answer: C
24. Which Nagios component is responsible for checking the status of external commands sent to Nagios?
A) Nagios Core
B) Nagios CmdListener
C) Nagios ExternalCommandListener
D) Nagios Event Broker
Answer: A
25. What is the default location for Nagios configuration files?
A) /etc/nagios
B) /usr/local/nagios/etc
C) /opt/nagios/config
D) /var/nagios/conf
Answer: B
26. What is the purpose of Nagios Event Handlers?
A) They automatically resolve problems without human intervention.
B) They provide real-time event notifications to users.
C) They execute additional actions when a problem is detected or resolved.
D) They handle scheduling and timing of checks.
Answer: C
27. Which plugin can be used to monitor CPU usage on a remote machine using NRPE?
A) check_cpu
B) check_nrpe
C) check_load
D) check_memory
Answer: A
28. What is the purpose of the "register" directive in Nagios configuration?
A) To specify whether a service check is active or passive
B) To register a new user in Nagios
C) To register a host or service definition
D) To register a downtime schedule
Answer: C
29. What does the "check_interval" directive in a service definition specify?
A) The time interval between active checks
B) The maximum check attempts before sending an alert
C) The interval for notifications
D) The interval for passive checks
Answer: A
30. Which Nagios component is responsible for processing performance data from checks?
A) Nagios Performance Processor
B) Nagios Performance Handler
C) Nagios Performance Data Collector
D) Nagios Performance Broker
Answer: D
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