Nokia 4A0-265 : Nokia Optical Diagnostics and Troubleshooting

4A0-265 real exams

Exam Code: 4A0-265

Exam Name: Nokia Optical Diagnostics and Troubleshooting

Updated: Aug 16, 2026

Q & A: 40 Questions and Answers

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Nokia 4A0-265 Exam Syllabus Topics:

SectionObjectives
Alarms, Conditions and Logs
Transmission and Power Adjustment Troubleshooting Techniques
Documentation and Support Information
Optical Signal Flow Through a Node
Performance Monitoring and Loopbacks for Troubleshooting
Troubleshooting Fiber Cuts / Line Issues and Alarm Correlation
Wavelength Tracker
Optical Transponder Configuration Troubleshooting
EPT Report Parameters and Power Commissioning Data

Nokia Optical Diagnostics and Troubleshooting Sample Questions:

1. Which of the following statements best describes the output of the command: show xc 1?

A) A list of all boards on all nodes that this cross-connection passes through, along with expected power levels, measured power levels, and allowed power deviations.
B) A list of boards that this cross-connection passes through on the local node, along with administrative/operational states, expected power levels, and measured power levels.
C) OCH trail name, ITU channel, administrative/operational states, protection states, and Wave Keys for both directions.
D) A list of cross-connections, including A-end, Z-end, frequency, ID number, OCH trail name, and administrative/operational states.


2. What is the typical severity level of a "Loss of Signal" (LOS) alarm?

A) Warning
B) Minor
C) Critical
D) Major


3. Which of the following issues can cause a "Loss too low" message to be displayed after a power adjustment has been provided?

A) A dirty fiber connector
B) A defective WSS unit
C) An incorrect EPT network design
D) Unstable optical power levels


4. Refer to the exhibit, which shows a conditions list from the 1830 PSS GUI. (i) What is the total number of alarms reported? (ii) How many service affecting alarms are displayed? (iii) How many conditions are displayed?

A) (i) total number of alarms = 2
(ii) number of service affecting alarms = 2
(Hi) number of conditions = 18
B) (i) total number of alarms = 4
(ii) number of service affecting alarms = 14
(iii) number of conditions = 2
C) (i) total number of alarms = 7
(ii) number of service affecting alarms = 5
(Hi) number of conditions = 7
D) (I) total number of alarms = 5
(ii) number of serviceaffectingalarms = 2
(Hi) number of conditions = 14


Solutions:

Question # 1
Answer: D
Question # 2
Answer: C
Question # 3
Answer: D
Question # 4
Answer: C

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