CompTIA DY0-001 Exam - Topic 2 Question 21 Discussion

Actual exam question for CompTIA's DY0-001 exam

Question #: 21
Topic #: 2

[All DY0-001 Questions]

The most likely concern with a one-feature, machine-learning model is high error due to:

Abias

Bdimensionality.

Cvariance.

Dprobability.

Show Suggested Answer

Suggested Answer: A

A model with only one feature is unlikely to capture the true complexity of the data's underlying relationships, leading to systematic underfitting - i.e., high bias.

by Gail at Jun 21, 2026, 09:50 AM

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Valentin

2 days ago

Surprised this is even a question, it's clearly A) bias!

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Bettina

7 days ago

I think it's more about C) variance, honestly.

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Paris

12 days ago

Definitely A) bias, that's a common issue.

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Tanesha

17 days ago

I lean towards A) bias too, especially since one feature might not capture the complexity of the data.

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Vincent

22 days ago

This feels similar to a practice question we did on model evaluation. I think it could be B) dimensionality, but I'm not confident.

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Felicidad

28 days ago

I'm not entirely sure, but I remember something about variance being a concern in more complex models.

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Lucia

1 month ago

I think the answer might be A) bias, since a one-feature model could oversimplify the problem.

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