MongoDB C100DBA Exam - Topic 1 Question 40 Discussion

Actual exam question for MongoDB's C100DBA exam

Question #: 40
Topic #: 1

Consider a collection posts which has fields: Jd, post_text, post_author, post_timestamp, post_tags etc. Which of the following query retrieves ONLY the key named post_text from the first document retrieved?

Adb.posts.finOne({},{_id:0, post_text:1})

Bdb.posts.findOne({post_text: 1})

Cdb.posts.find({},{_id:Of post_text:1})

Ddb.posts.finOne},{post_text:l})

Show Suggested Answer

Suggested Answer: A

by Evangelina at May 03, 2022, 07:20 AM

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Serina

4 months ago

Wait, can you really use finOne? That sounds off.

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Arthur

4 months ago

D is definitely wrong, looks like a mess!

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Lorean

4 months ago

C has a typo, it should be _id: 0 instead of _id:Of.

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Nickole

4 months ago

I think B looks right too, but it’s not for retrieving only one document.

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Shantell

5 months ago

A is the correct syntax for MongoDB.

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My

5 months ago

I’m pretty sure option D has a typo with "finOne" and "l" instead of "1". That can't be right!

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Marti

5 months ago

Option C seems off to me; I don't think you can use "Of" like that in a query.

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Brunilda

5 months ago

I remember practicing with similar queries, and I feel like findOne should be used, but I can't recall the exact syntax for it.

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Rikki

5 months ago

I think option A looks familiar, but I'm not entirely sure if it retrieves only post_text correctly.

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Pearly

5 months ago

Okay, let me see. Reports and widgets - that makes sense. I remember learning about those in the dashboard module. I think I've got this one figured out.

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Emmanuel

5 months ago

And the SBC is likely providing an edge proxy function, acting as the entry and exit point for the provider's network. That makes sense given its role as the source and destination.

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Mona

5 months ago

I'm not sure about this one. I'll need to think it through carefully.

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Essie

5 months ago

Hmm, I'm not totally sure about this one. The ipconfig command is related to network settings, but I'm not sure if it's specifically for displaying a client's address. I might need to think about this one a bit more.

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Iluminada

5 months ago

Okay, let me see here. Gavin is performing a website security audit, and the question is asking about the tool he's most likely using. I'm thinking Nikto or Nmap are the best bets, but I'll have to double-check the details of each tool to make sure I'm choosing the right one.

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