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Microsoft DP-100 Exam - Topic 10 Question 40 Discussion

Actual exam question for Microsoft's DP-100 exam
Question #: 40
Topic #: 10
[All DP-100 Questions]

You are solving a classification task.

You must evaluate your model on a limited data sample by using k-fold cross-validation. You start by configuring a k parameter as the number of splits.

You need to configure the k parameter for the cross-validation.

Which value should you use?

Show Suggested Answer Hide Answer
Suggested Answer: B

Leave One Out (LOO) cross-validation

Setting K = n (the number of observations) yields n-fold and is called leave-one out cross-validation (LOO), a special case of the K-fold approach.

LOO CV is sometimes useful but typically doesn't shake up the data enough. The estimates from each fold are highly correlated and hence their average can have high variance.

This is why the usual choice is K=5 or 10. It provides a good compromise for the bias-variance tradeoff.


by Nobuko at May 06, 2022, 10:46 AM

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Shelba
4 months ago
k=0.9? That’s just confusing, right?
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Lucy
4 months ago
I thought k=1 was valid too, but it’s not really cross-validation then.
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Lorrine
4 months ago
Wait, can you even use k=0.5? That seems off.
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Walker
5 months ago
Totally agree, k=10 gives a good balance!
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Elvis
5 months ago
k=10 is the standard choice for k-fold cross-validation.
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Paulene
5 months ago
I think k=10 is often recommended, but I wonder if the size of the dataset might influence the optimal k value.
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Lennie
5 months ago
I don't recall ever seeing k values like 0.5 or 0.9 in our practice questions. Those seem off to me.
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Rasheeda
5 months ago
I feel like k=10 is a common choice for k-fold cross-validation, but I'm not entirely sure if that's the best for every situation.
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Charlena
5 months ago
I remember that k should be greater than 1 for cross-validation to work properly, so I think k=1 is definitely not the right choice.
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Vilma
5 months ago
Hmm, I'm a bit unsure about this. I know franchises can scale quickly, but I'm not sure about the other options. I'll need to review my notes on franchise models.
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Nelida
5 months ago
This is a tricky one. I feel like I need to really understand the context of a "high-risk operation" to determine the key characteristics. I'll make sure to read through the question carefully and consider each option thoughtfully before answering.
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Chan
5 months ago
Hmm, this looks like a tricky one. I'll need to think carefully about the data format the Azure Function needs to handle.
upvoted 0 times
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Domingo
5 months ago
I vaguely remember that Medicaid is usually the secondary payer for people who have both, but I'm not entirely sure.
upvoted 0 times
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Delisa
5 months ago
This question seems straightforward. I think the answer is B - to integrate an approach to business management.
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