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Nokia Optical Diagnostics and Troubleshooting Sample Questions:

1. Which of the following statements about using Nokia product documentation in the troubleshooting process is TRUE?

A) Before investigating a problem it is important to check the Engineering and Planning Tool User Guide (EPTUG) if a possible issue has already been acknowledged by the Product Unit (PU).
B) The Customer Release Notes (CRNs) provides instructions to perform the automated provisioning, commissioning, and power balancing functions in a customer network based on the Nokia 1830 PS5 platform.
C) The Customer Release Notes (CRNs) document collects documented solved known issues, new issues discovered after the product software has been released.as well as software upgrade procedures and firmware details.
D) Before investigating a problem it is important to check the User Provisioning Guide (UPG) if a possible issue has already been acknowledged by the Product Unit (PU).

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

3. A power adjustment has succeeded conditionally because of gain settings set to higher levels than expected by design. Which of the following alarms will raise?

A) Gain Adjustment Exceeded Max Value (PWRMAXGAIN)
B) Invalid topology (PRCDRERR-TOPO)
C) Amplifier Gain Tilt Adjustments Suspended (PWRTILTSUSP)
D) Power Adjustment Failure (PWRADJFAIL)

4. Which of the following statements about the alarm masking mechanism is TRUE?

A) The alarm masking mechanism always forwards masked alarms to an external Network Management System (NMS) for alarm correlation.
B) The alarm masking mechanism preserves the events' original time stamps, when related alarms gets hidden and then eventually displayed because of the mechanism itself, so that the user can still know the date and time of the original issue.
C) The alarm masking mechanism updates the events' original time stamps when it masks/shows alarms, so that when an alarm is not masked anymore, the user can see the updated date and time associated with the original issue.
D) The alarm masking mechanism makes sure that alarms are always present on the downstream interfaces to facilitate the troubleshooting process.

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