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MongoDB C100DBA Exam - Topic 1 Question 25 Discussion

Consider that our posts collection contains an array field called tags that contains tags that the user enters. {Which of the following commands will find all the posts that have been tagged as tutorial.
C) db.posts.find( { tags : 'tutorial' } );
A) db.posts.find( { tags : ['tutorial'] } );
B) db.posts.find( { $array : {tags: 'tutorial') > );
D) db.posts.findInArray( { tags : 'tutorial' > );

MongoDB C100DBA Exam - Topic 1 Question 25 Discussion

Actual exam question for MongoDB's C100DBA exam
Question #: 25
Topic #: 1
[All C100DBA Questions]

Consider that our posts collection contains an array field called tags that contains tags that the user enters. {

Which of the following commands will find all the posts that have been tagged as tutorial.

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Suggested Answer: C

by Yoko at May 03, 2022, 10:36 PM

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Xuan
8 months ago
I agree, C is the only one that makes sense here!
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Lonna
9 months ago
Wait, can you really use $array like that? Seems off.
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Christa
9 months ago
No way, D is totally wrong.
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Hobert
9 months ago
I think A looks good too, but it’s not quite right.
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Tracey
9 months ago
Option C is definitely the right choice!
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Ivan
9 months ago
I practiced a similar question where we had to find documents with specific tags, and I think option C looks right.
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Arlean
9 months ago
I'm not entirely sure, but I remember something about using `$elemMatch` for arrays. Is that relevant here?
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Ronna
9 months ago
I think the correct command should be the one that uses a simple equality check, like `tags: 'tutorial'`.
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Blythe
9 months ago
I feel like option A is close, but it seems off because of the array brackets. I might be overthinking it though.
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Leonard
9 months ago
Hmm, this one seems tricky. I'll need to carefully review the log entries to see what the "ExecutionLink From:" text refers to.
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Lemuel
9 months ago
This question seems to be testing our knowledge of VRF and routing protocols. I'll need to carefully consider the scalability and flexibility of each option.
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Laurene
9 months ago
Okay, I think I've got this. The key is that the Internships object is the master, so we need to focus on granting access to the Applications object.
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Wilford
9 months ago
I think local law is definitely part of the regulatory framework, but I'm not sure about the other options.
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