Free Nokia 4A0-205 Exam Questions

Become Nokia Certified with updated 4A0-205 exam questions and correct answers

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Total 71 Questions | Updated On: Feb 11, 2026

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Question 1

Which of the following statements best describes the general configuration of a switched WDM?

A : A master PSS-24x that hosts a PSS-32 as a sub-shelf.

B : A master PSS-8 that hosts a PSS-12x/24x as a sub-shelf.

C : A master WDM node that hosts PSS-8x/12x/24x as a sub-shelf or vice versa.

D : A master PSS-8x that hosts a PSS-16x as a sub-shelf.

Answer: C

Question 2

WDM allows transmission systems to:

A : ansport multiple signals transparently, onto several wavelengths, all together over one single fiber

B : crease the bit rate of each client signal by spreading it over multiple wavelengths

C : are a single signal among multiple fibers doing load balancing, and thus increasing the reliability of the optical transmission

D : locate different signals to different time slots

Answer: A

Question 3

Which of the following statements about Data Communication Network (DCN) is FALSE?

A : DCN is a data network carrying the management and/or signaling traffic of a telecommunication network.

B : Out of Band DCN is the part of a DCN that is not implemented by the managed network elements.

C : In Band DCN is the part of a DCN that is not implemented by the managed network elements.

D : In Band DCN is the part of a DCN that is implemented by the managed network elements.

Answer: C

Question 4

Which of the following statements is true about chromatic dispersion (CD)?

A : fferent channels have different bandwidth and this causes different CD performances.

B : fiber attenuation changes along the fiber, and when the light crosses these differences the CD takes place.

C : fferent wavelengths propagate at different speeds within the same media and therefore different colors travel in the fiber with different speed.

D : fiber attenuation introduces inter-channel interference.

Answer: C

Question 5

What is the main function of an optical amplifier?

A : Demodulating the incoming signal

B : Compensating for optical power attenuation

C : Compensating for chromatic dispersion

D : Compensating for attenuation through an optical-electrical-optical amplification

Answer: B

Page: 1 / 15

Total 71 Questions | Updated On: Feb 11, 2026

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