← Back to exam page

4A0-255 – Nokia Advanced Optical Network Design

Loading demo links...

Showing 4–5 of 5 questions

Question 4

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

Select an option, then click Submit answer.

  • ○

    QPSK

  • ○

    BPSK

  • ○

    4QAM

  • ○

    DP-QPSK


Question 5

Which ofthe following statements about Raman amplification is FALSE?

Select an option, then click Submit answer.

  • ○

    Amplification occurs along the fiber

  • ○

    Chromatic dispersion within the fiber is increased.

  • ○

    Flat gain can be achieved in any transmission band.

  • ○

    OSNR is improved compared to EDFAs permitting lingers spans