Free Google Professional-Machine-Learning-Engineer Actual Exam Questions - Question 2 Discussion

Question No. 2
You developed a custom model by using Vertex Al to forecast the sales of your company s products
based on historical transactional data You anticipate changes in the feature distributions and the
correlations between the features in the near future You also expect to receive a large volume of
prediction requests You plan to use Vertex Al Model Monitoring for drift detection and you want to
minimize the cost. What should you do?
Select one option, then reveal solution.
US
AN
Ali N.
2026-02-20

I think D makes the most sense here. Using feature attributions gives a deeper insight into drift while lowering the prediction-sampling-rate near 0 means much less data is monitored overall, which should save costs despite the extra overhead of attributions. The key is balancing fewer samples with more detailed monitoring, and D nails that better than just tweaking frequency or sampling rates alone.

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AN
Ali N.
2026-02-17

D, sampling rate near 0 reduces data volume, saving cost despite extra attribution overhead.

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AN
Ali N.
2026-02-17

Option D makes sense because lowering the prediction-sampling rate cuts the amount of data processed, which should reduce cost even if feature attributions add some overhead. Using both features and attributions helps catch drift better.

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SI
Sami I.
2026-02-16

A/D? A uses just features but increases monitoring frequency, which ups cost. D lowers prediction sampling a lot and uses attributions, so it might cut costs more despite extra data. Seems D fits the cost goal better.

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Sami I.
2026-02-11

It’s C. Using features plus attributions gives better drift insights, and lowering monitoring frequency reduces cost by checking less often instead of sampling fewer predictions.

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MN
Michael N.
2026-02-10

Maybe D works best here. Using both features and feature attributions covers more ground for drift detection, and setting the sampling rate closer to 0 means you’re sending fewer prediction data points for monitoring, which definitely cuts costs. Since they expect a large volume of prediction requests, reducing the amount of data monitored without losing important info seems smart. Option C lowers frequency but might miss quick drifts, while A and B don’t balance cost and detection as well.

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Michael N.
2026-02-10

D Using both features and attributions but sampling closer to 0 cuts costs significantly.

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AA
Ash A.
2026-02-09

I’m thinking option C is a solid choice here. Lowering the monitoring frequency below default cuts down on how often you check for drift, which saves costs. Plus, using both features and feature attributions should give a fuller picture of changes. Compared to just tweaking sampling, reducing frequency seems more straightforward for cost control without losing critical insights on drift. So C feels like the best balance between thorough monitoring and minimizing expenses.

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AA
Ash A.
2026-02-09

I think option D makes sense from a cost perspective because sampling closer to 0 reduces the amount of data sent for monitoring, which lowers cost. Also, using both features and feature attributions should give a more comprehensive view of drift. Option C suggests lowering the monitoring frequency, but if changes happen quickly, that might delay detection. Could it be that combining low sampling with richer data (features + attributions) in D strikes the right balance? Does anyone know if sampling too low might miss important drift signals even with attributions included?

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ZU
Zain U.
2026-01-30

Maybe C, lowering monitoring frequency helps save cost without missing important drift signals.

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Ryan A.
2026-01-30

Option A might be risky because increasing the monitoring-frequency value actually means monitoring less often, which could delay detecting drift when feature distributions are changing. Also, just using features without attributions might miss some subtle shifts. On the other hand, option D lowers prediction sampling but still uses both features and attributions, offering a good balance between catching drift and cost control. But is there a point where reducing sampling too much leads to missing important drift signals? How low can you go before monitoring becomes ineffective?

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Sarah N.
2026-01-26

I’m thinking about option A here. If you raise the monitoring-frequency value above default, you’ll check less often, which saves money. Plus, just using features for monitoring keeps it simpler and cheaper than adding feature attributions. But I’m not sure if setting a higher monitoring frequency might risk missing some drift events since you’re monitoring less frequently. Anyone see a downside to that?

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EO
Ethan O.
2026-01-26

Actually, C could be a solid choice too. Using both features and feature attributions gives a more detailed view of drift, and setting the monitoring frequency lower than default means fewer checks, which cuts cost. It balances good detection with budget control better than just fiddling with sampling rates alone. D reduces costs by sampling less but might miss subtle changes since feature attributions are included, adding overhead anyway. So, lowering how often you monitor seems like a smarter way to save money without losing too much insight.

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RT
Rizwan T.
2026-01-23

Probably D. Using features and feature attributions can detect drifts more precisely, but since cost is a concern, setting prediction-sampling-rate closer to 0 reduces the number of predictions logged, saving money. Lower sampling with feature attributions balances drift detection and cost well.

Option C suggests lowering monitoring frequency, but if prediction volume is high, sampling rate impacts cost more directly than frequency does. So D seems like the best choice to minimize cost while still monitoring effectively.

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RT
Rizwan T.
2026-01-21

Maybe B makes sense too since setting a prediction-sampling-rate closer to 1 means you sample more predictions, which might catch drifts better but costs more. So to minimize cost, you’d want it closer to 0, opposite of B.

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RT
Rizwan T.
2026-01-19

D/C? Using feature attributions helps catch complex drifts, but they add extra cost. Lowering sample rate (D) saves more money, especially with high prediction volume. So D seems better for minimizing cost.

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AU
Amir U.
2026-01-16

A/D? Using more features or feature attributions ups costs, so D makes sense to keep sample rate low. Increasing frequency as in A might increase costs, so that’s less ideal.

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OK
Omar K.
2026-01-15

Question: For cost minimization, should we focus on reducing monitoring frequency or prediction sample rate? Also, is feature attribution really necessary if we're trying to cut costs?

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