Free Nokia 4A0-205 Practice Test & Real Exam Questions

Exam Code/Number: 4A0-205
Exam Name/Title: Nokia Optical Networking Fundamentals
Certification Provider: Nokia
Corresponding Certification: Nokia Optical Network Professional

Exam Questions: 62
Updated On: Jul 11, 2026

Question #15

Which of the following is an example of optical protection mechanism?

A. GR and SBR combined

B. OSNCP (e.g., via Y-cable or OPS card)

C. GMPLS-enabled SBR

D. Optical regeneration (e.g., back-to-back regeneration)

Discussion 0

Correct Answer: B Vote an answer

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Question #16

Which of the following statements about the ODUk unit is TRUE?

A. The ODUk is the first container in which the client signal is inserted.

B. The ODUk contains the FEC.

C. The ODUk is the basic payload that can be electronically groomed and switched in the OTN network.

D. The ODUk is processed at an optical level.

Discussion 0

Correct Answer: C Vote an answer

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Question #17

What is the main function of an optical amplifier?

A. Demodulating the incoming signal

B. Compensating for chromatic dispersion

C. Compensating for optical power attenuation

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

Discussion 0

Correct Answer: C Vote an answer

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Question #18

What is the block that converts the colorless (or black and white) client signal to a specific optical channel in a WDM system?

A. Dispersion compensation module (DCM)

B. Static filter device (SFD)

C. Optical transponder (OT)

D. Wavelength router (WR)

Discussion 0

Correct Answer: C Vote an answer

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Question #19

With reference to the power budget, what is the meaning of receiver dynamic range?

A. It is the maximum receiver power to prevent an overload.

B. It is the range between the receiver overload power and its sensitivity.

C. It is the minimum power to be received for a given BER.

D. It is the range between the maximum transmit power and the minimum transmit power.

Discussion 0

Correct Answer: B Vote an answer

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Question #20

WDM allows transmission systems to:

A. Transport multiple signals transparently, onto several wavelengths, all together over one single fiber

B. Increase the bit rate of each client signal by spreading it over multiple wavelengths

C. Allocate different signals to different time slots

D. Share a single signal among multiple fibers doing load balancing, and thus increasing the reliability of the optical transmission

Discussion 0

Correct Answer: A Vote an answer

Question #21

Which type of ports are present in the Colorless Wavelength Router (CWR)?

A. Colorless bi-directional ports

B. DeMux ports

C. Black and white ports

D. Colorless uni-directional ports only

Discussion 0

Correct Answer: A Vote an answer

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