ZCE Advanced Troubleshooting Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. A Zabbix agent is showing "not supported" for all items. What is the
most likely cause?
A) Wrong template assigned
B) Firewall blocking passive checks
C) Incorrect item key syntax
D) Database corruption
Correct answer: C) Incorrect item key syntax
Rationale: If an item key is invalid or misspelled, the agent cannot process
it, resulting in "not supported" errors.
2. Which log is most useful when troubleshooting Zabbix server crashes?
A) /var/log/messages
B) zabbix_server.log
,C) httpd.log
D) dmesg
Correct answer: B) zabbix_server.log
Rationale: The Zabbix server log contains detailed runtime errors and crash
diagnostics.
3. A trigger is not firing despite clear data conditions being met. What
should you check first?
A) Frontend cache
B) Trigger expression syntax
C) User permissions
D) Proxy version
Correct answer: B) Trigger expression syntax
Rationale: Incorrect expressions prevent triggers from evaluating properly.
4. What does a "Zabbix agent is unreachable" error usually indicate?
A) Wrong macro used
B) Network connectivity issue
C) Database overload
D) Incorrect trigger dependency
,Correct answer: B) Network connectivity issue
Rationale: This error commonly occurs when the server cannot reach the
agent due to network or firewall issues.
5. Which component processes item checks in a distributed setup?
A) Frontend
B) Proxy
C) API server
D) Web server
Correct answer: B) Proxy
Rationale: Zabbix proxies handle data collection in distributed monitoring
environments.
6. A newly added item shows no data. What is the first thing to verify?
A) Host DNS resolution
B) Item is enabled and correctly configured
C) Dashboard widgets
D) Maintenance mode
Correct answer: B) Item is enabled and correctly configured
Rationale: Disabled or misconfigured items do not collect data.
7. What is the default port for Zabbix agent communication?
, A) 3306
B) 80
C) 10050
D) 10051
Correct answer: C) 10050
Rationale: Zabbix agents listen on port 10050 by default.
8. High CPU usage on Zabbix server is most commonly caused by:
A) Too many frontend users
B) Excessive unsupported items
C) High number of active checks and triggers
D) Slow DNS resolution only
Correct answer: C) High number of active checks and triggers
Rationale: Heavy monitoring workloads increase CPU usage significantly.
9. Which database issue can cause slow Zabbix performance?
A) High RAM availability
B) Missing indexes
C) Too many dashboards
D) Low agent version
Correct answer: B) Missing indexes
Rationale: Poor database indexing slows query performance drastically.
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. A Zabbix agent is showing "not supported" for all items. What is the
most likely cause?
A) Wrong template assigned
B) Firewall blocking passive checks
C) Incorrect item key syntax
D) Database corruption
Correct answer: C) Incorrect item key syntax
Rationale: If an item key is invalid or misspelled, the agent cannot process
it, resulting in "not supported" errors.
2. Which log is most useful when troubleshooting Zabbix server crashes?
A) /var/log/messages
B) zabbix_server.log
,C) httpd.log
D) dmesg
Correct answer: B) zabbix_server.log
Rationale: The Zabbix server log contains detailed runtime errors and crash
diagnostics.
3. A trigger is not firing despite clear data conditions being met. What
should you check first?
A) Frontend cache
B) Trigger expression syntax
C) User permissions
D) Proxy version
Correct answer: B) Trigger expression syntax
Rationale: Incorrect expressions prevent triggers from evaluating properly.
4. What does a "Zabbix agent is unreachable" error usually indicate?
A) Wrong macro used
B) Network connectivity issue
C) Database overload
D) Incorrect trigger dependency
,Correct answer: B) Network connectivity issue
Rationale: This error commonly occurs when the server cannot reach the
agent due to network or firewall issues.
5. Which component processes item checks in a distributed setup?
A) Frontend
B) Proxy
C) API server
D) Web server
Correct answer: B) Proxy
Rationale: Zabbix proxies handle data collection in distributed monitoring
environments.
6. A newly added item shows no data. What is the first thing to verify?
A) Host DNS resolution
B) Item is enabled and correctly configured
C) Dashboard widgets
D) Maintenance mode
Correct answer: B) Item is enabled and correctly configured
Rationale: Disabled or misconfigured items do not collect data.
7. What is the default port for Zabbix agent communication?
, A) 3306
B) 80
C) 10050
D) 10051
Correct answer: C) 10050
Rationale: Zabbix agents listen on port 10050 by default.
8. High CPU usage on Zabbix server is most commonly caused by:
A) Too many frontend users
B) Excessive unsupported items
C) High number of active checks and triggers
D) Slow DNS resolution only
Correct answer: C) High number of active checks and triggers
Rationale: Heavy monitoring workloads increase CPU usage significantly.
9. Which database issue can cause slow Zabbix performance?
A) High RAM availability
B) Missing indexes
C) Too many dashboards
D) Low agent version
Correct answer: B) Missing indexes
Rationale: Poor database indexing slows query performance drastically.
