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?

ANumber of documents that match the query condition

BNumber of index entries scanned

CDetails the completed execution of the winning plan as a tree of stages

DNumber of documents scanned

Show Suggested Answer

Suggested Answer: B

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

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Desiree

4 days 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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Belen

9 days 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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