Jan-2024 Nokia 4A0-265 Certification Real 2024 Mock Exam [Q20-Q37]

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Jan-2024 Nokia 4A0-265 Certification Real 2024 Mock Exam

4A0-265 Exam Questions and Valid PMP Dumps PDF

To pass the Nokia 4A0-265 exam, candidates will need to demonstrate their ability to identify and troubleshoot various types of optical network problems, including signal degradation, fiber attenuation, and transmission errors. They will also be expected to understand common optical testing methods, such as power meter and optical time-domain reflectometry (OTDR) testing, and be able to interpret test results accurately.

NO.20 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

NO.21 Which of the following CLI commands displays a list of the expected and measured output power for the channels whose admin state is up?

config wavekey power detail

show wavekey wtsource

config wavekey summary

show wavekey wtsource power

NO.22 Which of the following statements correctly describes where power adjustments can be performed?

In bidirectional configurations, ingress power adjustments are performed against the ingress amplifiers, while egress power adjustments are performed against the egress amplifiers.

In bidirectional configurations, both ingress and egress power adjustments are performed against the ingress amplifiers only.

In unidirectional configurations, both ingress and egress power adjustments are performed against the ingress amplifiers only.

When Raman pumps are used, both ingress and egress power adjustments are performed against the Raman pump directly.

NO.23 Which of the following statements best describes the payload type setting?

Payload type attribute is recorded within the client payload and must be entered manually.

Payload type attribute Is recorded within the client payload and can be set automatically.

Payload type attribute is recorded within the OTN overhead and must be entered manually.

Payload type attribute is recorded within the OTN overhead and can be set automatically or manually.

NO.24 Which of the following statements best describes the output of the command: show xc 1?

OCH trail name, ITU channel, administrative/operational states, protection states, and Wave Keys for both directions.

A list of cross-connections, including A-end, Z-end, frequency, ID number, OCH trail name, and administrative/operational states.

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.

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.

NO.25 A “Power Adjustment Required” alarm was raised on the ingress amplifier in slot 1/10. Which of the following commands should be entered to manually adjust the related amplifier optical power levels?

config powermgmt ingress 1/10 scot

config powermgmt ingress 1/10 power adjustment

config powermgmt ingress 1/10

config powermgmt ingress 1/10 adjust

NO.26 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.

NO.27 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.

NO.28 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.

NO.29 Suppose a unidirectional amplifier has been plugged into slot 1/13. Which command should the user enter to retrieve the OSC pluggable module type?

show interface 1/13/OSC

show interface 1/13/OSCSFP

show interface 1/13/OSC detail

show interface 1/13/OSCSFP detail

NO.30 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.

NO.31 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)

NO.32 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.

NO.33 Consider the exhibit. Given the following power readings, what is the calculated span loss from Node A to Node B?

11.5

8.0

2.5

1.5

NO.34 What is the typical severity level of a “Loss of Signal” (LOS) alarm?

Critical

Major

Minor

Warning

NO.35 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.