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Nokia Optical Diagnostics and Troubleshooting Sample Questions:

1. Which of the following statements best describes the Forward Error Correction (FEC) technique?

A) FEC enables errors to be detected and corrected without retransmission. This technique is effective only above a specified OSNR threshold.
B) FEC enables errors to be detected and data to be retransmitted. This technique is effective only below a specified OSNR threshold.
C) FEC enables errors to be detected and corrected without retransmission. This technique is effective only below a specified OSNR threshold.
D) FEC enables errors to be detected and data to be retransmitted. This technique is effective only above a specified OSNR threshold.

2. 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 = 7
(ii) number of service affecting alarms = 5
(Hi) number of conditions = 7
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 = 5
(ii) number of serviceaffectingalarms = 2
(Hi) number of conditions = 14
D) (i) total number of alarms = 2
(ii) number of service affecting alarms = 2
(Hi) number of conditions = 18

3. Which of the following CLI commands displays a list of the expected and measured output power for the channels whose admin state is up?

A) config wavekey power detail
B) show wavekey wtsource
C) config wavekey summary
D) show wavekey wtsource power

4. Consider the exhibit. A single directional fiber cut is occurring between two amplifiers in bidirectional configuration. Which node(s) will report a "LD Input LOS" alarm?

A) Node B only
B) Node A and Node B
C) Node A only
D) Node C only

Solutions: