[UPDATED] Nokia 4A0-265 Certification Exam Questions [Q18-Q37]

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[UPDATED] Nokia 4A0-265 Certification Exam Questions

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Q18. Suppose a Raman amplifier has been plugged into slot 1/8. Which command should the user enter to retrieve the total optical power detected at the ingress interface?

show interface 1/8 opin

show interface 1/8 power

show Interface 1/8/LINEIN

show interface 1/8/UNEIN detail

Q19. On a bidirectional optical amplifier configuration, which of the following are Wavelength Tracker detection points?

LINEOUT and SIGOUT interfaces.

SIG interface only.

LINE and SIG interfaces.

An optical amplifier has no Wavelength Tracker detection points.

Q20. 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?

Invalid topology (PRCDRERR-TOPO)

Amplifier Gain Tilt Adjustments Suspended (PWRTILTSUSP)

Power Adjustment Failure (PWRADJFAIL)

Gain Adjustment Exceeded Max Value (PWRMAXGAIN)

Q21. Consider the exhibit. Given the following power readings, what is the calculated span loss from Node A to Node B?

10.0 dB

8.0 dB

5.0 dB

2.0 dB

Q22. Which of the following statements about the alarm masking mechanism is TRUE?

The alarm masking mechanism makes sure that alarms are always present on the downstream interfaces to facilitate the troubleshooting process.

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.

The alarm masking mechanism always forwards masked alarms to an external Network Management System (NMS) for alarm correlation.

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.

Q23. Which of the following commands is used to retrieve the total output power level?

show interface am2125a 1/6/lineout

show interface am2125a 1/6/lineout detail

show interface am212 5a 1/6/lineout pm

show interface am2125a 1/6/lineout wavekey

Q24. Consider the exhibit. A single directional fiber cut is occurring between two amplifiers in unidirectional configuration with Raman pump.
Multiple services are crossing the affected span.
Which node(s) will report an Incoming Payload LOS” alarm?

No node, as a Raman pump is used in Node A.

Node C only.

Both Node A and Node C

Neither Node A nor Node C.

Q25. Which of the following statements about optical power vs amplification stages is TRUE?

Ingress amplifiers are always more powerful [than egress amplifiers, to reduce the impact of non-linear effects.

When channels pass through amplifiers, all of them always experience a similar amplification.

When multiple channels pass through a shared port (for example, an amplifier line interface), the total aggregated power reflects the number of channels currently present.

The Optical Supervisory Channel (OSC) is amplified when passing through all amplifier types, except for Raman which is not based on EDFA.

Q26. Which of the following issues can cause a “Loss too low” message to be displayed after a power adjustment has been provided?

Unstable optical power levels

A dirty fiber connector

An incorrect EPT network design

A defective WSS unit

Q27. Suppose a channel-related alarm is reported on an 1830 PSS node, and is related to a possible Wave Keys clock source issue. What is the recommended order for the following troubleshooting steps?

1. Retrieve the channel power trace.
2. Determine the active clock reference source.
3. Switch to alternate clock source (PF).
4. Replace the suspect PF.

1. Retrieve the channel power trace.
2. Replace the suspect PF.
3. Determine the active clock reference source.
4. Switch to alternate clock source (PF).

1. Determine the active clock reference source.
2. Replace the suspect PF.
3. Retrieve the channel power trace.
4. Switch to alternate clock source (PF).

1. Replace the suspect PF.
2. Retrieve the channel power trace.
3. Switch to alternate clock source (PF).
4. Determine the active clock reference source.

Q28. Which of the following statements about the Wavelength Tracker (WT) capability is TRUE?

Wave Keys are originated by optical amplifiers.

WT uses a unique identifier based on a pair of numbers encoded by Raman amplifiers into each service wavelength direction.

WT is compatible with other vendor domains, but the user must make sure that Wave Keys are unique on the crossed domains.

WT uses a unique identifier based on a pair of numbers encoded by Optical Transponders OTs) into each service wavelength direction.

Q29. When troubleshooting possible generic fiber cuts, the recommended first step is to: 1. Review alarms at nodes where power loss occurs.
What is the next recommended step?

Review PM data to determine if the problem is intermittent.

Perform network power traces to attempt to determine the point of power loss.

Monitor amplifier total power in/out to isolate the direction of a possible cut.

Review EPT design for calculated span loss.

Q30. Suppose a network operator needs to configure the 10GbE client interface 1/7/C1 with a GFP-F encapsulation mode. Which command should be used?

config interface 1/7/C1 tenGige encmode gfp-f

config encmode interface 1/7/C1 10client gfp-f

config interface 1/7/C1 encmode 10client gfp-f

config encmode interface 1/7/C1 tenGige gfp-f

Q31. Suppose a node is experiencing a little unexpected attenuation over the Optical Supervisory Channel (OSC) transmit direction. Which of the following statements is FALSE?

No OSC-related alarms will raise on the local node.

A “Data Link Down” alarm will raise on the adjacent node.

A Power adjustments action will fail on the local node.

Traffic will pass between the local and adjacent node.

Q32. What is the default severity level for a Threshold Crossing Alert (TCA) alarm?

Critical

Major

Minor

Warning

Q33. Suppose a “Channel Absent” alarm is reported on an 1830 PSS node. What is the recommended order for the following troubleshooting steps?

1. Go to the suspected troubled node / card / port and look at Wave Keys (in / out).
2. Retrieve the cross-connection (XC) details and see what Wave Keys should be present.
3. Check observed Wave Keys against expected Wave Keys.
4. Retrieve the channel power trace.

1. Retrieve the channel power trace.
2. Retrieve the cross-connection (XC) details and see what Wave Keys should be present.
3. Go to the suspected troubled node / card / port and look at Wave Keys (in / out).
4. Check observed Wave Keys against expected Wave Keys.

1. Retrieve the cross-connection (XC) details and see what virave Keys should be present.
2. Go to the suspected troubled node / card / port and look at Wave Keys (in / out).
3. Retrieve the channel power trace.
4. Check observed Wave Keys against expected Wave Keys.

1. Check observed Wave Keys against expected Wave Keys.
2. Go to the suspected troubled node / card / port and look at Wave Keys (in / out).
3. Retrieve the channel power trace.
4. Retrieve the cross-connection (XC) details and see what Wave Keys should be present.