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MongoDB Exam C100DBA Topic 6 Question 96 Discussion

Actual exam question for MongoDB's C100DBA exam
Question #: 96
Topic #: 6
[All C100DBA Questions]

What does the totalKeysExamined field returned by the explain method indicate?

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Suggested Answer: B

by Salena at Sep 11, 2024, 04:49 AM

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Twanna
2 months ago
Wait, is this a trick question? What if the totalKeysExamined field actually returns the number of times the developer scratched their head while writing the query?
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Caitlin
2 months ago
Hmm, I was leaning towards A) until I read these other responses. Now I'm convinced B) is the correct answer. The other options just seem way off the mark.
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Selma
19 days ago
Definitely not C) or D). B) seems to be the most accurate choice.
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Rodrigo
20 days ago
Yeah, I agree. A) doesn't seem right after reading the other options.
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Precious
2 months ago
I think B) is the correct answer too. It makes more sense.
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Charlene
2 months ago
C) Details the completed execution of the winning plan as a tree of stages? That's way too complex for a simple totalKeysExamined field. I'm sticking with B) - it just makes the most sense.
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Coral
1 months ago
I'm not sure, but I think it might be D) Number of documents scanned.
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Denae
1 months ago
I agree with you, I also think it's A).
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Margot
2 months ago
I think it's A) Number of documents that match the query condition.
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Desiree
3 months ago
D) Number of documents scanned? Seriously? That's way too obvious. I'm going with B) - the number of index entries scanned sounds like the most relevant information provided by the totalKeysExamined field.
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Viva
2 months ago
A) Number of documents that match the query condition
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Trinidad
2 months ago
C) Details the completed execution of the winning plan as a tree of stages
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Jamie
2 months ago
B) Number of index entries scanned
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Belen
3 months ago
A) seems logical, but I think B) is the correct answer. The totalKeysExamined field should indicate the number of index entries scanned, which is more relevant for understanding the query performance.
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Kayleigh
1 months ago
A) Number of documents that match the query condition
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Coletta
2 months ago
C) Details the completed execution of the winning plan as a tree of stages
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Theola
2 months ago
B) Number of index entries scanned
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Gilma
2 months ago
A) seems logical, but I think B) is the correct answer.
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Rashad
3 months ago
I agree with Barbra, it makes sense that it would be the number of index entries scanned.
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Chandra
4 months ago
I believe it actually represents the number of documents scanned.
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Barbra
4 months ago
I think the totalKeysExamined field indicates the number of index entries scanned.
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