Logical Operations Exam CFR-210 Topic 3 Question 76 Discussion

Actual exam question for Logical Operations's CFR-210 exam

Question #: 76
Topic #: 3

An attacker has sent malicious macro-enabled Office files. Which of the following regular expressions will return a list of macro-enabled files?

A^.*?\.(?:xls|ppt|doc)m

B^.*(?:xls|ppt|doc)m.*

C^.*?\.(?:xls|ppt|doc)m$

D^.*(?:xls|ppt|doc)m

Show Suggested Answer

Suggested Answer: B

by Han at Sep 15, 2024, 02:56 AM

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Elouise

4 months ago

I'm going to have to go with Option A. It's the only one that properly uses the '?' to make the extension optional. Gotta love those non-greedy quantifiers!

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Desiree

4 months ago

Option D? Really? That's missing the file extension entirely. Might as well just search for 'xls', 'ppt', and 'doc' and hope for the best.

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Vivan

3 months ago

Option D is incorrect. It's missing the file extension at the end.

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Donte

3 months ago

B) ^.*(?:xls|ppt|doc)m.*

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Rosendo

4 months ago

C) ^.*?\\.(?:xls|ppt|doc)m$

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Albina

4 months ago

A) ^.*?\\.(?:xls|ppt|doc)m

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Stephaine

4 months ago

Hmm, Option B is a bit too broad for my liking. I'd rather have something a bit more specific to just the file extension.

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Cornell

4 months ago

I would go with Option C, it looks for the file extension at the end of the file name.

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Elenora

4 months ago

I agree, Option B seems too general and could potentially return false positives.

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Rosamond

4 months ago

I think Option A might be the best choice, it specifically looks for the file extensions.

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Jennie

5 months ago

I'm going with Option C. The $ at the end ensures we're only matching the file extension, not just any part of the filename.

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Rosendo

4 months ago

I see your point, but I still believe Option C is the best option. The $ at the end ensures we're only matching the file extension.

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Dahlia

4 months ago

I agree with User1, Option A seems to be the most accurate choice for identifying macro-enabled files.

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Elin

4 months ago

I think Option A is the correct one. It includes the file extensions and the m for macro-enabled files.

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Matthew

5 months ago

Can you explain why you think C is the correct answer?

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Sage

5 months ago

Option A looks good to me. It's a pretty comprehensive regex that should catch all those macro-enabled files.

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Jerry

3 months ago

User 4: Let's go with option A then, it seems like the best option.

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Kayleigh

4 months ago

User 3: I agree, option A looks like the most accurate choice.

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Yuette

4 months ago

Yeah, option A seems like it will capture all the macro-enabled files.

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Sabina

4 months ago

I think option A is the correct regex to use.

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Tess

5 months ago

I disagree, I believe the correct answer is C) ^.*?\\.(?:xls|ppt|doc)m$

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Matthew

5 months ago

I think the answer is A) ^.*?\\.(?:xls|ppt|doc)m

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