Nagios Monitoring Configuration &
Setup Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
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1. What is the primary configuration file used by Nagios Core?
A. services.cfg
B. objects.cfg
C. nagios.cfg
D. commands.cfg
Answer: C. nagios.cfg
Rationale: This is the main configuration file that controls core
Nagios settings such as log file, object paths, and global options.
2. Which directory typically stores Nagios object configuration files?
A. /usr/local/nagios/bin
B. /usr/local/nagios/etc/objects
C. /var/nagios/log
, D. /etc/httpd/conf
Answer: B. /usr/local/nagios/etc/objects
Rationale: Object definitions like hosts, services, and commands are
stored in the objects directory.
3. What defines a host in Nagios?
A. A service being monitored
B. A network device or server being monitored
C. A plugin
D. A notification method
Answer: B. A network device or server being monitored
Rationale: Hosts represent physical or virtual machines under
monitoring.
4. Which component executes checks in Nagios?
A. Web server
B. NRPE daemon
C. Nagios Core engine
D. SSH service
Answer: C. Nagios Core engine
Rationale: The core engine schedules and executes checks either
directly or via plugins.
5. What is a Nagios plugin?
A. A web interface module
, B. A script or binary that performs checks
C. A configuration file
D. A logging tool
Answer: B. A script or binary that performs checks
Rationale: Plugins return status information (OK, WARNING,
CRITICAL, UNKNOWN).
6. What are valid Nagios service states?
A. START, STOP, PAUSE, RUN
B. UP, DOWN, MAINTAINED, FAILED
C. OK, WARNING, CRITICAL, UNKNOWN
D. ACTIVE, PASSIVE, IDLE, BUSY
Answer: C. OK, WARNING, CRITICAL, UNKNOWN
Rationale: These are standard service state outputs from plugins.
7. What does NRPE stand for?
A. Nagios Remote Plugin Executor
B. Network Routing Protocol Engine
C. Nagios Real-time Performance Evaluator
D. Node Remote Processing Engine
Answer: A. Nagios Remote Plugin Executor
Rationale: NRPE allows execution of plugins on remote Linux/Unix
hosts.
, 8. Which file defines commands in Nagios?
A. commands.cfg
B. hosts.cfg
C. timeperiods.cfg
D. localhost.cfg
Answer: A. commands.cfg
Rationale: Command definitions specify how checks are executed.
9. What is a host check used for?
A. Checking CPU usage
B. Determining if a host is UP or DOWN
C. Checking logs
D. Sending notifications
Answer: B. Determining if a host is UP or DOWN
Rationale: Host checks verify availability of systems.
10. What is a service in Nagios?
A. A user account
B. A network interface
C. A specific function or resource on a host
D. A plugin
Answer: C. A specific function or resource on a host
Rationale: Services monitor aspects like CPU, disk, or HTTP.
Setup Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary configuration file used by Nagios Core?
A. services.cfg
B. objects.cfg
C. nagios.cfg
D. commands.cfg
Answer: C. nagios.cfg
Rationale: This is the main configuration file that controls core
Nagios settings such as log file, object paths, and global options.
2. Which directory typically stores Nagios object configuration files?
A. /usr/local/nagios/bin
B. /usr/local/nagios/etc/objects
C. /var/nagios/log
, D. /etc/httpd/conf
Answer: B. /usr/local/nagios/etc/objects
Rationale: Object definitions like hosts, services, and commands are
stored in the objects directory.
3. What defines a host in Nagios?
A. A service being monitored
B. A network device or server being monitored
C. A plugin
D. A notification method
Answer: B. A network device or server being monitored
Rationale: Hosts represent physical or virtual machines under
monitoring.
4. Which component executes checks in Nagios?
A. Web server
B. NRPE daemon
C. Nagios Core engine
D. SSH service
Answer: C. Nagios Core engine
Rationale: The core engine schedules and executes checks either
directly or via plugins.
5. What is a Nagios plugin?
A. A web interface module
, B. A script or binary that performs checks
C. A configuration file
D. A logging tool
Answer: B. A script or binary that performs checks
Rationale: Plugins return status information (OK, WARNING,
CRITICAL, UNKNOWN).
6. What are valid Nagios service states?
A. START, STOP, PAUSE, RUN
B. UP, DOWN, MAINTAINED, FAILED
C. OK, WARNING, CRITICAL, UNKNOWN
D. ACTIVE, PASSIVE, IDLE, BUSY
Answer: C. OK, WARNING, CRITICAL, UNKNOWN
Rationale: These are standard service state outputs from plugins.
7. What does NRPE stand for?
A. Nagios Remote Plugin Executor
B. Network Routing Protocol Engine
C. Nagios Real-time Performance Evaluator
D. Node Remote Processing Engine
Answer: A. Nagios Remote Plugin Executor
Rationale: NRPE allows execution of plugins on remote Linux/Unix
hosts.
, 8. Which file defines commands in Nagios?
A. commands.cfg
B. hosts.cfg
C. timeperiods.cfg
D. localhost.cfg
Answer: A. commands.cfg
Rationale: Command definitions specify how checks are executed.
9. What is a host check used for?
A. Checking CPU usage
B. Determining if a host is UP or DOWN
C. Checking logs
D. Sending notifications
Answer: B. Determining if a host is UP or DOWN
Rationale: Host checks verify availability of systems.
10. What is a service in Nagios?
A. A user account
B. A network interface
C. A specific function or resource on a host
D. A plugin
Answer: C. A specific function or resource on a host
Rationale: Services monitor aspects like CPU, disk, or HTTP.
