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MongoDB C100DBA Exam - Topic 1 Question 54 Discussion

Actual exam question for MongoDB's C100DBA exam

Question #: 54
Topic #: 1

[All C100DBA Questions]

Addding the index {a:l} can potentially decrease the speed of which of the following operations? Check all that apply.

Adb.collection.update({b:456>, {$inc: {a:l> })

Bdb.collection.find( {a : 232} )

Cdb.collection.insert( { a:341})

Show Suggested Answer

Suggested Answer: A, C

by Erinn at Jun 28, 2022, 03:30 AM

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Mabel

8 months ago

Definitely slows down updates and inserts.

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Jules

8 months ago

Surprised to hear that! I thought indexes only helped.

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Marisha

9 months ago

I think it might also affect inserts, right?

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Stefanie

9 months ago

Totally agree, especially with updates!

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Lynda

9 months ago

Adding an index can slow down updates.

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Margarita

9 months ago

I feel like I read that adding an index can slow down all write operations, but I can't recall the details.

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Tonja

9 months ago

I practiced a similar question, and I think the index might slow down the insert operation as well.

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Edda

9 months ago

I remember something about how indexes can make find operations faster, but I’m unclear about their impact on updates.

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Tonja

9 months ago

I think adding an index can slow down updates, but I'm not sure if it affects inserts too.

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Carol

9 months ago

Hmm, I'm not sure about this one. There are a few options that seem reasonable, but I'll need to think it through carefully.

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Monte

10 months ago

Okay, let's see here. I think the key is understanding how the pricing logic and cart line item object are used for these types of products. I'll need to focus on that.

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