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MongoDB C100DBA Exam - Topic 1 Question 41 Discussion

Actual exam question for MongoDB's C100DBA exam
Question #: 41
Topic #: 1
[All C100DBA Questions]

The________operator can be used to identify an element in the array to be updated without explicitly specifying

the position of the element.

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Suggested Answer: D

by Lawrence at May 05, 2022, 10:12 AM

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Desirae
4 months ago
I thought you had to know the index to update an array element.
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Tawny
4 months ago
I agree, $elemMatch is the way to go!
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Cassandra
4 months ago
Wait, can you really update without the index? Sounds odd.
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Nickolas
4 months ago
Nah, I believe it's $slice.
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Gail
5 months ago
I think it's definitely $elemMatch!
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Hubert
5 months ago
I think it’s $<, but I’m not entirely confident. It seems to fit the description of updating elements directly.
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Eleonora
5 months ago
I feel like we discussed that you can update without knowing the index, but I can't remember which operator does that.
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Julio
5 months ago
I think the answer might be $elemMatch, but I'm not completely sure. It sounds familiar from our practice questions.
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Lashanda
5 months ago
I remember something about updating arrays, but I can't recall if $slice is the right operator for this.
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Yvonne
5 months ago
Hmm, this looks like a tricky one. I'll need to think carefully about the dashboard categories provided out-of-the-box.
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Luis
5 months ago
Okay, let me think this through step-by-step. The command sets the LDNS probe order to DNS, PING, and TCP. So the order to calculate the dynamic proximity will be the DNS UDP query, then the ping, and finally the TCP. I'm confident that D. Round-trip time (RTT) is the correct answer.
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Delsie
5 months ago
Okay, let's see here. The product led approach seems like it could be relevant, but I'm not sure if that's the best fit for a quote renewal. I'll have to think this through.
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Kizzy
5 months ago
I think as the points get closer to the line, r2 should become larger, right? That just makes sense.
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