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Nokia 4A0-255 Practice Test Questions Answers

Exam Code: 4A0-255 (Updated 40 Q&As)
Exam Name: Nokia Advanced Optical Network Design
Last Update: 09-Aug-2025
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  • Single Choice: 40 Q&A's

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    4A0-255 Questions and Answers

    Question # 1

    Suppose there is a 40 Gbit/s signal which has a symbol rate of Gbaud/s. Which modulation format is being used?

    A.

    QPSK

    B.

    BPSK

    C.

    4QAM

    D.

    DP-QPSK

    Question # 2

    Which of the following can be detected through power monitoring with an Optical Time Domain Reflect meter?

    A.

    Intrusions on fibers

    B.

    Power injection one channel

    C.

    Hacking of L1 encryption

    D.

    Intrusions in the cryptographic keys

    Question # 3

    Refer to the exhibit that shows a demand matrix, a network topology with candidate links (in thick bluelinesand dashed lines), the definednetwork in thick blue lines and the demand routing (colored numbers in the figure). Every link is 80 km long. Which of the following requirements is supported by this network design with the displayed demand routing?

    A.

    1+1 protection

    B.

    Minimum cost design

    C.

    Minimum latency

    D.

    Resilience against two link faults

    Question # 4

    Which of the following statements about the Decision (HDEFC) decoding and soft decision FEC (SDFEC) decoding is FALSE?

    A.

    HDFEC injects less latency into the decoding process than SDFEC.

    B.

    HDFEC provides a higher coding gain than SDEFC

    C.

    HDFEC uses fewer thresholds than SDEFC.

    D.

    HDFEC discards bits earlier in the decoding process than SDEFC.

    Question # 5

    Consider the exhibit that shows a network design in EPT.

    Seven segments are definedsegment lengths are shown in the list below the network map.

    3 services are defined each service carries a 10G signal, is protected by diverse path and is router by shorted distance.

    Which of the following links is the heavily loaded?

    A.

    Site A- SiteB

    B.

    SiteC–SiteD

    C.

    SiteE-SiteF

    D.

    All three links have the same load

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