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Databricks Certified Professional Data Scientist Exam - Topic 5 Question 79 Discussion

Actual exam question for Databricks's Databricks Certified Professional Data Scientist exam
Question #: 79
Topic #: 5
[All Databricks Certified Professional Data Scientist Questions]

Let's say you have two cases as below for the movie ratings

1. You recommend to a user a movie with four stars and he really doesn't like it and he'd rate it two stars

2. You recommend a movie with three stars but the user loves it (he'd rate it five stars). So which statement correctly applies?

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Suggested Answer: A

by Leatha at Feb 12, 2025, 03:35 AM

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Verda
3 months ago
D is definitely not the answer, it has to be one of the others.
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Talia
3 months ago
Wait, how can the RMSE be the same? That seems off!
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Miesha
3 months ago
C could be true, depends on the context.
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Lelia
4 months ago
I disagree, B makes more sense to me.
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Darell
4 months ago
A is correct, RMSE contribution is the same.
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Valentin
4 months ago
I feel like this could go either way, but I lean towards option C since the contributions could vary based on the actual ratings.
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Hoa
4 months ago
If I recall correctly, the contribution to RMSE should be different because the errors are different in magnitude.
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Cecilia
4 months ago
I'm not so sure about that. I remember a practice question where the RMSE varied based on how far off the prediction was.
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Marvel
5 months ago
I think the RMSE contribution might be the same in both cases since we're looking at the difference from the predicted ratings.
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Luis
5 months ago
I'm leaning towards option C. The contribution to RMSE could vary depending on the specific values involved, even though the direction of the error is the same in both cases.
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Catina
5 months ago
Okay, I think I've got this. The key is recognizing that the RMSE formula squares the differences between predicted and actual ratings. So even though the magnitude of the error is different in the two cases, the squared contribution to RMSE would be the same.
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Aleta
5 months ago
Hmm, I'm a bit confused on how the RMSE would be impacted here. I'll need to review the RMSE formula and consider how the differences in predicted and actual ratings would affect the overall error.
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Kristeen
5 months ago
This is a tricky one. I'll need to think through the RMSE (root mean squared error) calculation carefully to determine how the contribution differs in these two cases.
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Lisbeth
9 months ago
Haha, none of the above? That's a bold move. I bet the exam writers thought they were being really clever with this one. But I'm going to have to agree - option B is the way to go here.
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Von
9 months ago
Hmm, I'm not sure about that. I think option C might be more accurate - the contribution to the RMSE could vary depending on the specific ratings and the algorithm used. It's not always a straightforward calculation.
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Jeanice
8 months ago
User 4: So, none of the above?
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Elly
8 months ago
User 3: It's not always a straightforward calculation.
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Stephania
8 months ago
User 2: Yeah, the contribution to the RMSE could vary.
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Bobbye
8 months ago
User 3: So it's not always the same, depending on the specific cases.
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Chandra
9 months ago
User 1: I think option C is more accurate.
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Phyliss
9 months ago
User 2: Yeah, it makes sense. The ratings and algorithm play a role in that.
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Avery
9 months ago
User 1: I think option C is correct, the contribution to the RMSE could vary.
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Michael
10 months ago
I'd have to go with option B. The contribution to the RMSE is definitely different in these two scenarios. The error is more significant when the user's rating is way off from the recommended one.
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Kendra
9 months ago
So, it's safe to say that the contribution to the RMSE varies depending on how the user rates the movie.
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Wilda
9 months ago
I agree, the error would be more significant when the user's rating is far from the recommendation.
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Rickie
9 months ago
I think option B is correct. The RMSE would be different in each case.
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Hildred
10 months ago
The RMSE (Root Mean Squared Error) is going to be different in these two cases. When the user rates a 4-star movie as 2-stars, the error is much greater than when they rate a 3-star movie as 5-stars.
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Albina
9 months ago
C) In both cases, the contribution to the RMSE, could varies
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Jesus
9 months ago
The RMSE will be higher in the first case where the user rates a 4-star movie as 2-stars.
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Lindsey
9 months ago
A) In both cases, the contribution to the RMSE is the different
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Rodrigo
11 months ago
I'm not sure, but I think D) None of the above could also be a possibility
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Sylvie
11 months ago
I agree with Scarlet, because the contribution to the RMSE could vary depending on how much the user liked or disliked the movie
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Scarlet
11 months ago
I think the answer is C)
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