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.

Adb.posts.find( { tags : ['tutorial'] } );

Bdb.posts.find( { $array : {tags: 'tutorial') > );

Cdb.posts.find( { tags : 'tutorial' } );

Ddb.posts.findInArray( { tags : 'tutorial' > );

Show Suggested Answer

Suggested Answer: C

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

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Xuan

7 months ago

I agree, C is the only one that makes sense here!

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Lonna

7 months ago

Wait, can you really use $array like that? Seems off.

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Christa

7 months ago

No way, D is totally wrong.

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Hobert

7 months ago

I think A looks good too, but it’s not quite right.

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Tracey

8 months ago

Option C is definitely the right choice!

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Ivan

8 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

8 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

8 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

8 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

8 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

8 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

8 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

8 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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