Free Nokia 4A0-255 Exam Actual Questions

The questions for 4A0-255 were last updated On Mar 24, 2025

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Question No. 1

What is guardband required for?

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Correct Answer: D

Question No. 2

What does an OPU tributary slot contain, when multiplexing OTN frames?

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Correct Answer: C

Question No. 3

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

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Correct Answer: B

Question No. 4

Consider the exhibit. The grey sites (Site 1 through Site6) from an existing network, which will be extended by adding Site7 and Site8. Which of the following is NOT a common source of interoperability issues for this network extension?

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Correct Answer: B

Question No. 5

Which of the following best describes self-phase modulation?

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Correct Answer: D