GAQM CFA-001 Exam - Topic 4 Question 127 Discussion

Actual exam question for GAQM's CFA-001 exam

Question #: 127
Topic #: 4

[All CFA-001 Questions]

In an echo data hiding technique, the secret message is embedded into a __________as an echo.

ACover audio signal

BPhase spectrum of a digital signal

CPseudo-random signal

DPseudo- spectrum signal

Show Suggested Answer

Suggested Answer: A

by Meaghan at Aug 18, 2026, 08:46 AM

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Georgeanna

3 days ago

I think it's A) Cover audio signal. Makes sense for echo hiding.

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Michel

9 days ago

Pseudo-random signal? That sounds a bit off to me.

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Cheryl

14 days ago

I've seen this technique used a lot, A makes sense.

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Rashad

19 days ago

Wait, are we sure it's not B? Sounds plausible.

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Viola

24 days ago

Totally agree, it's all about the audio!

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Xochitl

29 days ago

A) Cover audio signal is the right answer!

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Sonia

1 month ago

I’m leaning towards A) Cover audio signal, but I vaguely recall something about pseudo-random signals being used in other contexts. Not completely confident, though.

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Ethan

1 month ago

I feel like it could be A too, but I have this nagging doubt about B) Phase spectrum. We talked about that in relation to signal processing.

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Ilene

1 month ago

I remember practicing a similar question, and I think it was also about embedding in audio. So, A) Cover audio signal sounds right to me.

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Josephine

2 months ago

I think the answer might be A) Cover audio signal, but I'm not entirely sure. We discussed this in class, and it seems to fit the definition.

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