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MongoDB C100DBA Exam - Topic 1 Question 17 Discussion

Actual exam question for MongoDB's C100DBA exam
Question #: 17
Topic #: 1
[All C100DBA Questions]

Which of the following index would be optimum for the query?

Select all valid. db.test.find( { a : 5, c : 2 })

Show Suggested Answer Hide Answer
Suggested Answer: B, C

by Jolanda at May 09, 2022, 06:53 PM

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Marva
4 months ago
Is D really a valid option? Seems like overkill to me.
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Noah
4 months ago
I agree with C, it's the simplest and most effective.
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Roxane
4 months ago
Wait, why would anyone pick A? That doesn't make sense.
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Pete
4 months ago
I think B could work too, but not as efficiently.
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Felicitas
5 months ago
Option C is definitely the best choice!
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Mari
5 months ago
I’m leaning towards C as well, but I wonder if A could be valid since it starts with c. I need to double-check that.
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Allene
5 months ago
I practiced a similar question before, and I feel like B might be overkill with all those extra fields.
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Precious
5 months ago
I'm not entirely sure, but I remember something about the order of fields in compound indexes being important. Maybe A could work too?
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Josefa
5 months ago
I think option C is definitely a good choice since it has both fields a and c in the index.
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Alease
5 months ago
Okay, the question is asking about the type of VPN implementation, and the options mention IKEv1 cluster, IKEv2 backup gateway, IKEv2 load balancer, and IKEv2 reconnect. I'll need to think through the characteristics of each one to determine which best matches the diagram.
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Gracie
5 months ago
Hmm, I'm a bit unsure about this one. The scenario seems clear, but I'm not sure which of the diagrams best represents the door open/close process. I'll need to think this through step-by-step.
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Elenor
5 months ago
I'm leaning towards A as well. Giving the tester some structure and objectives, but still allowing for exploration, seems like a good balance for this type of testing approach.
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Mari
5 months ago
I'm not too familiar with BIDIR-PIM, MP-BGP, or MSDP, so I'll need to eliminate those options and focus on understanding spine headend replication.
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Noah
5 months ago
This seems like a standard EFP calculation problem. I'll start by writing out the formula and plugging in the given values. As long as I don't make any silly mistakes, I should be able to arrive at the correct answer.
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