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MongoDB C100DBA Exam - Topic 1 Question 24 Discussion

Actual exam question for MongoDB's C100DBA exam
Question #: 24
Topic #: 1
[All C100DBA Questions]

What does the following $slice query return using the following command? db.posts.find( {}, { comments: { $slice: [ -10, 5 ] } } )

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Suggested Answer: A

by Weldon at May 04, 2022, 12:51 AM

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Laurel
7 months ago
I thought it would return the last 10 comments, not just 5.
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Krissy
7 months ago
Nope, it's definitely not option C.
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Alise
7 months ago
Wait, how does that even work? Sounds weird.
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Stevie
7 months ago
Totally agree, it's option A!
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Olive
8 months ago
It returns 5 comments starting from the last 10.
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Gail
8 months ago
I’m confused about whether it starts counting from the last 10 comments or if it just returns the last 5 comments.
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Oliva
8 months ago
I remember practicing a similar question where negative values indicated starting from the end of the array, so maybe it’s option A?
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Trinidad
8 months ago
I think the $slice operator is supposed to return a subset of an array, but I'm not entirely sure how the negative index works in this context.
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Hyun
8 months ago
I feel like I saw something about how $slice can take two parameters, but I can't recall exactly how they interact.
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Malcolm
8 months ago
Okay, I've got this. The Business Case is the DSDM product that is used for prioritization within a project portfolio, so that's my answer.
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Sharen
8 months ago
Okay, I'm feeling pretty confident about this one. I think Option C is the way to go - creating a Triggered Send and then enabling the custom Reply Mail Management settings to send the auto-reply. That should do the trick.
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