Databricks Certified Professional Data Scientist Exam - Topic 4 Question 17 Discussion

Actual exam question for Databricks's Databricks Certified Professional Data Scientist exam

Question #: 17
Topic #: 4

[All Databricks Certified Professional Data Scientist Questions]

The method based on principal component analysis (PCA) evaluates the features according to

AThe projection of the largest eigenvector of the correlation matrix on the initial dimensions

BAccording to the magnitude of the components of the discriminate vector

CThe projection of the smallest eigenvector of the correlation matrix on the initial dimensions

DNone of the above
Feature Selection:
The method based on principal component analysis (PCA) evaluates the features
according to the projection of the largest eigenvector of the correlation matrix on the
initial dimensions, the method based on Fisher's linear discriminate analysis
evaluates. Them according to the magnitude of the components of the discriminate
vector.

Show Suggested Answer

Suggested Answer: A

by Ernest at May 05, 2022, 10:55 PM

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Dean

4 months ago

Not sure about that, what if there's more to it?

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Xochitl

4 months ago

Definitely A, can't mix up PCA and LDA!

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Hubert

4 months ago

Wait, is it really just the largest eigenvector? Sounds too simple.

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Solange

4 months ago

Totally agree, it's all about that projection!

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Emmett

5 months ago

PCA uses the largest eigenvector, right?

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Art

5 months ago

I recall that PCA is all about reducing dimensionality, and it definitely involves the largest eigenvector, so I would go with A.

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Krystina

5 months ago

I’m a bit confused about the difference between the largest and smallest eigenvectors in PCA. Does it really matter which one we refer to?

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Glory

5 months ago

I remember practicing a question that mentioned the correlation matrix and eigenvectors, so I feel like A is probably correct.

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Dewitt

5 months ago

I think PCA focuses on the largest eigenvector, but I'm not entirely sure if that's the right way to phrase it.

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Catherin

5 months ago

I'm a bit confused on this one. I'll need to review the process start options more closely to figure out which one wouldn't work.

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Edward

5 months ago

Hmm, I'm a bit unsure about this one. There are a few different options, and I want to make sure I understand the right approach before selecting an answer.

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Nieves

5 months ago

Hmm, I'm not entirely sure about this one. I know Spectrum is involved in data analysis, but I can't recall if it's specifically the component that indexes metadata. I'll have to think this through carefully.

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Elbert

5 months ago

The question is pretty straightforward. I'd start by installing the FSLogix agent on the session hosts, then configuring the Profiles setting for the host pool. Shouldn't be too difficult as long as I follow the steps closely.

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Lavelle

5 months ago

I'm pretty confident the answer is TCP 2427. That's the port used for Cisco Unity Connection to communicate with Cisco UCM, so that's where I'd focus my troubleshooting.

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