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MongoDB C100DBA Exam - Topic 1 Question 18 Discussion

You perform the following operation in the shell: db.foo.insert( { } ); What gets inserted?
C) A document with an _id assigned to be an Objectld
A) A document will be inserted with the same _id as the last document inserted
B) A document that matches the collection's existing schema, but with null fields
D) An empty document
E) No document will be inserted; an error will be raised

MongoDB C100DBA Exam - Topic 1 Question 18 Discussion

Actual exam question for MongoDB's C100DBA exam
Question #: 18
Topic #: 1
[All C100DBA Questions]

You perform the following operation in the shell: db.foo.insert( { } ); What gets inserted?

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Suggested Answer: C

by Ronny at May 04, 2022, 12:36 AM

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Tambra
8 months ago
Nope, it’s just an empty document, nothing fancy!
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Beckie
9 months ago
I think it just gets an auto-generated _id.
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Larae
9 months ago
Wait, really? I thought it would raise an error.
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Buck
9 months ago
Definitely D! That's how it works.
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Freeman
9 months ago
An empty document gets inserted.
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Jamal
9 months ago
I feel like the answer is A, but I also remember something about ObjectId being assigned automatically.
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Delsie
9 months ago
I’m a bit confused; I thought the insert would create a new document with a unique _id, but I can't recall the exact details.
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Donte
9 months ago
I think an empty document gets inserted, but I'm not entirely sure if it will have an _id or not.
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Rebbecca
9 months ago
I remember practicing a question where an empty document was inserted, so I’m leaning towards option D.
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Britt
9 months ago
I'm feeling pretty confident about this one. The scenario clearly outlines the customer data issues, like duplication and lack of synchronization, that an MDM tool is designed to solve. I'll select data duplication, data accuracy/quality, and data completeness.
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Celeste
9 months ago
Okay, let me see. I know tags can make data more understandable, so I'm leaning towards C.
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