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

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

A) A list of cross-connections, including A-end, Z-end, frequency, ID number, OCH trail name, and administrative/operational states.
B) OCH trail name, ITU channel, administrative/operational states, protection states, and Wave Keys for both directions.
C) 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.
D) 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.

3. 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 = 5
(ii) number of serviceaffectingalarms = 2
(Hi) number of conditions = 14
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 = 2
(ii) number of service affecting alarms = 2
(Hi) number of conditions = 18
D) (i) total number of alarms = 7
(ii) number of service affecting alarms = 5
(Hi) number of conditions = 7

4. What is the default severity level for a Threshold Crossing Alert (TCA) alarm?

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

Solutions: