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Nokia 4A0-255 Exam - Topic 6 Question 15 Discussion

Suppose there is a 40 Gbit/s signal which has a symbol rate of Gbaud/s. Which modulation format is being used?
C) 4QAM
A) QPSK
B) BPSK
D) DP-QPSK

Nokia 4A0-255 Exam - Topic 6 Question 15 Discussion

Actual exam question for Nokia's 4A0-255 exam
Question #: 15
Topic #: 6
[All 4A0-255 Questions]

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

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Suggested Answer: C

by Luisa at Dec 08, 2022, 12:39 AM

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Roxane
7 months ago
Wait, how does that even work?
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Rolande
7 months ago
Not so sure about that, could be 4QAM too.
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Ashlyn
7 months ago
40 Gbit/s with Gbaud? Sounds like QPSK to me.
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Oretha
8 months ago
I think it's DP-QPSK actually.
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Meghann
8 months ago
It's definitely QPSK, right?
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Carmela
8 months ago
If the signal is 40 Gbit/s, I think that means the symbol rate should be 20 Gbaud for QPSK, but I’m not completely confident in that calculation.
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Vallie
8 months ago
I’m a bit confused about the difference between QPSK and DP-QPSK. I feel like I might be mixing them up in my head.
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Monte
8 months ago
I remember practicing a similar question where we had to determine modulation formats based on bit rates. I think QPSK could be the right choice since it doubles the data rate.
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Jody
8 months ago
I think the symbol rate is key here, but I'm not entirely sure how to calculate it from the given bit rate.
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Rodolfo
8 months ago
This seems like a straightforward accounts payable question. I'll focus on the key details - the supplier hasn't sent the invoice yet, but the buyer will pay next month. That means the amount should be recorded as an accrued expense.
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Keshia
8 months ago
Modified curl-ups sound familiar; I just can't recall if they're primarily for core strength or overall muscular assessment.
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