Free Nokia 4A0-255 Exam Actual Questions

The questions for 4A0-255 were last updated On Nov 19, 2024

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Question No. 1

Which of the following best describes self-phase modulation?

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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

Consider two EDFA amplifiers in cascade. Each EDFA has an average input signal power of 10 mW and an average noise power of 1 mW. What is the OSNR of the system at the receiver.

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Correct Answer: A

Question No. 4

What is guardband required for?

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Correct Answer: D

Question No. 5

Which of the following is NOT a functionality provided by a coherent receiver?

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Correct Answer: C

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