Nagios Core Administrator Certification Exam
Questions With Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of Nagios Core?
A. Database management
B. Network monitoring and alerting
C. Web hosting
D. File storage
Answer: B
Rationale: Nagios Core is designed for monitoring IT infrastructure
such as servers, network devices, services, and applications. It
generates alerts when systems fail or thresholds are breached.
2. Which file is the main configuration file for Nagios Core?
A. services.cfg
B. nagios.ini
, C. nagios.cfg
D. core.conf
Answer: C
Rationale: The nagios.cfg file is the central configuration file that
controls global settings, object definitions inclusion, and core daemon
behavior.
3. What is a Nagios plugin primarily used for?
A. Installing the Nagios server
B. Sending emails
C. Checking the status of services or hosts
D. Creating dashboards
Answer: C
Rationale: Plugins are external scripts or binaries used by Nagios to
perform checks on hosts and services and return status results.
4. Which protocol is commonly used by NRPE?
A. HTTP
B. SSH
, C. TCP
D. FTP
Answer: C
Rationale: NRPE (Nagios Remote Plugin Executor) communicates over
TCP, typically on port 5666, to execute remote checks.
5. What does "active check" mean in Nagios?
A. Checks initiated by the monitored host
B. Checks initiated by Nagios server
C. Manual checks only
D. Disabled checks
Answer: B
Rationale: Active checks are initiated by the Nagios monitoring server
at scheduled intervals.
6. What is a "passive check"?
A. A check initiated by Nagios automatically
B. A check initiated by external applications
C. A check that is always failing
D. A disabled monitoring method
, Answer: B
Rationale: Passive checks are submitted by external applications or
scripts to Nagios rather than being initiated by Nagios itself.
7. Which directory typically stores Nagios plugins?
A. /etc/nagios/
B. /usr/local/nagios/libexec/
C. /var/nagios/plugins/
D. /opt/nagios/bin/
Answer: B
Rationale: The default plugin directory is /usr/local/nagios/libexec/,
where all check plugins are stored.
8. What is the default web interface URL path for Nagios?
A. /monitor
B. /nagios
C. /admin
D. /status
Answer: B
Questions With Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of Nagios Core?
A. Database management
B. Network monitoring and alerting
C. Web hosting
D. File storage
Answer: B
Rationale: Nagios Core is designed for monitoring IT infrastructure
such as servers, network devices, services, and applications. It
generates alerts when systems fail or thresholds are breached.
2. Which file is the main configuration file for Nagios Core?
A. services.cfg
B. nagios.ini
, C. nagios.cfg
D. core.conf
Answer: C
Rationale: The nagios.cfg file is the central configuration file that
controls global settings, object definitions inclusion, and core daemon
behavior.
3. What is a Nagios plugin primarily used for?
A. Installing the Nagios server
B. Sending emails
C. Checking the status of services or hosts
D. Creating dashboards
Answer: C
Rationale: Plugins are external scripts or binaries used by Nagios to
perform checks on hosts and services and return status results.
4. Which protocol is commonly used by NRPE?
A. HTTP
B. SSH
, C. TCP
D. FTP
Answer: C
Rationale: NRPE (Nagios Remote Plugin Executor) communicates over
TCP, typically on port 5666, to execute remote checks.
5. What does "active check" mean in Nagios?
A. Checks initiated by the monitored host
B. Checks initiated by Nagios server
C. Manual checks only
D. Disabled checks
Answer: B
Rationale: Active checks are initiated by the Nagios monitoring server
at scheduled intervals.
6. What is a "passive check"?
A. A check initiated by Nagios automatically
B. A check initiated by external applications
C. A check that is always failing
D. A disabled monitoring method
, Answer: B
Rationale: Passive checks are submitted by external applications or
scripts to Nagios rather than being initiated by Nagios itself.
7. Which directory typically stores Nagios plugins?
A. /etc/nagios/
B. /usr/local/nagios/libexec/
C. /var/nagios/plugins/
D. /opt/nagios/bin/
Answer: B
Rationale: The default plugin directory is /usr/local/nagios/libexec/,
where all check plugins are stored.
8. What is the default web interface URL path for Nagios?
A. /monitor
B. /nagios
C. /admin
D. /status
Answer: B
