MENU
What does the totalKeysExamined field returned by the explain method indicate?
Suggested Answer: B
Get Premium C100DBA Questions
as Interactive Web-Based Practice Test or PDF
Real Exam Format
Detailed Explanations
Instant Access
Get Your Practice Test
34 comments · newest first
VE
Vesta
10 months ago
I’m surprised it’s not about matching documents!
LO
Louvenia
11 months ago
Nope, it's definitely about documents.
SO
Sommer
11 months ago
Wait, I thought it was about index entries?
CA
Cassie
11 months ago
Totally agree, it's D for sure!
DA
Dawne
11 months ago
It's the number of documents scanned.
VI
Vincent
12 months ago
I’m leaning towards it being the number of documents scanned, but I need to double-check my notes on that.
RO
Roxanne
12 months ago
I practiced a similar question, and I feel like it has to do with how many documents match the query condition.
OR
Ora
12 months ago
I remember something about it indicating the number of documents scanned, but I could be mixing it up with another concept.
LA
Laurel
1 year ago
I think the totalKeysExamined field might refer to the number of index entries scanned, but I'm not entirely sure.
LA
Lamar
1 year ago
I feel pretty confident about this one. The totalKeysExamined field is going to show the number of index entries that were scanned as part of executing the query, which is what option B is describing. The other options don't seem to match up as well.
SE
Selma
1 year ago
Okay, I've got a strategy here. The question is asking what the totalKeysExamined field indicates, so I need to think about what that field is telling me about the query execution. I'm leaning towards option B, since that sounds like it's describing the index usage.
MU
Murray
1 year ago
Hmm, I'm a bit unsure about this one. I know the explain method provides details on the query execution, but I'm not totally clear on the difference between the number of documents that match the query and the number of index entries scanned.
WI
Wilda
1 year ago
This seems like a straightforward question about the explain method in MongoDB. I think the key is to understand what the totalKeysExamined field represents.
TW
Twanna
1 year 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?
CA
Caitlin
1 year 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.
SE
Selma
1 year ago
Definitely not C) or D). B) seems to be the most accurate choice.
RO
Rodrigo
1 year ago
Yeah, I agree. A) doesn't seem right after reading the other options.
PR
Precious
1 year ago
I think B) is the correct answer too. It makes more sense.
CH
Charlene
1 year 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.
CO
Coral
1 year ago
I'm not sure, but I think it might be D) Number of documents scanned.
DE
Denae
1 year ago
I agree with you, I also think it's A).
MA
Margot
1 year ago
I think it's A) Number of documents that match the query condition.
DE
Desiree
1 year 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.
VI
Viva
1 year ago
A) Number of documents that match the query condition
TR
Trinidad
1 year ago
C) Details the completed execution of the winning plan as a tree of stages
JA
Jamie
1 year ago
B) Number of index entries scanned
BE
Belen
1 year 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.
KA
Kayleigh
1 year ago
A) Number of documents that match the query condition
CO
Coletta
1 year ago
C) Details the completed execution of the winning plan as a tree of stages
TH
Theola
1 year ago
B) Number of index entries scanned
GI
Gilma
1 year ago
A) seems logical, but I think B) is the correct answer.
RA
Rashad
2 years ago
I agree with Barbra, it makes sense that it would be the number of index entries scanned.
CH
Chandra
2 years ago
I believe it actually represents the number of documents scanned.
BA
Barbra
2 years ago
I think the totalKeysExamined field indicates the number of index entries scanned.