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MongoDB C100DBA Exam - Topic 1 Question 2 Discussion

Actual exam question for MongoDB's C100DBA exam
Question #: 2
Topic #: 1
[All C100DBA Questions]

Which of the following commands finds all the documents in the posts collection with post timestamp field as null?

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Suggested Answer: C

by Vincent at May 06, 2022, 11:52 AM

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Minna
7 months ago
$type as null? Really? That seems off.
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Nobuko
7 months ago
Definitely not D, that doesn't make sense.
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Nickie
7 months ago
Wait, C has a syntax error, right?
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Marla
7 months ago
I think B is the right choice!
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Jules
8 months ago
Option A is incorrect, it should be $type.
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Benedict
8 months ago
Option C looks wrong to me, but I can't remember why. I think it had something to do with the syntax being off.
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Flo
8 months ago
I'm leaning towards option A, but I feel like `$type` is the right operator for checking field types.
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Verdell
8 months ago
I remember practicing a question where we had to find documents with null fields, but I can't recall the exact syntax.
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Jade
8 months ago
I think the command should check for null values, but I'm not sure if it's `$type` or something else.
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Rima
8 months ago
Okay, I've got a strategy for this. Video conferencing is all about connecting people remotely, so the key is whether it's real-time or not. I'll re-read the question carefully and go with the option that best fits.
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Thomasena
8 months ago
This looks like a straightforward manufacturing account question. I'll need to calculate the prime cost based on the information provided in the table.
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Kerry
8 months ago
Hmm, the monitor is marking the member as down even though it's working directly. I wonder if there's an issue with the monitor configuration.
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