Alibaba Exam ACA-Developer Topic 7 Question 43 Discussion

Actual exam question for Alibaba's ACA-Developer exam

Question #: 43
Topic #: 7

[All ACA-Developer Questions]

What are the benefits of creating indexes on PolarDB? (Number of correct answers: 2)

AImprove the query efficiency SELECT statements.

BImprove the efficiency of DML operations such as UPDATE.

CImprove the efficiency of DDL operations.

DReduce invalid data scanning.

Show Suggested Answer

Suggested Answer: A, B, C

by Corinne at Jul 09, 2023, 07:29 PM

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Carolynn

1 months ago

Ooh, this is a tricky one. I'm going to guess A and C, because who doesn't love faster DDL ops? But I could be way off base here.

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Allene

9 days ago

User 3: I'm not sure, but I'll go with A and B just to mix it up.

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Leota

13 days ago

User 2: I agree, faster SELECT statements and DDL ops are always a plus.

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Janessa

14 days ago

User 1: I think A and C are correct.

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Aleta

2 months ago

I'm going to go with A and D. Reducing invalid data scans sounds like a nice perk of indexing.

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Lavonna

6 days ago

That's a good choice. Indexes can definitely help with those benefits.

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Terrilyn

15 days ago

D) Reduce invalid data scanning.

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Teresita

18 days ago

A) Improve the query efficiency SELECT statements.

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Rima

2 months ago

Haha, I bet the folks at PolarDB would say the benefits are 'polar' opposite of what we expect! But seriously, A and D are my picks.

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Xuan

9 days ago

It's important to consider both A and D when thinking about the benefits of indexes on PolarDB.

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Maile

25 days ago

Reducing invalid data scanning is also a great benefit of creating indexes.

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Cathern

1 months ago

I agree, creating indexes on PolarDB can really improve query efficiency.

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Rickie

2 months ago

I'm not sure about B - I thought indexes were mainly for improving read operations, not writes. But A and D definitely sound right.

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Margery

2 months ago

A and D seem like the clear winners here. Indexes are all about speeding up queries, so those make perfect sense.

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Ivan

2 months ago

So, creating indexes can make database operations faster overall.

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Scarlet

2 months ago

Yes, that's true. It can also improve the efficiency of DML operations like UPDATE.

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Ivan

2 months ago

I think creating indexes on PolarDB can improve query efficiency.

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Davida

2 months ago

I agree. It can also improve the efficiency of DML operations like UPDATE.

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Gussie

2 months ago

Yes, that's correct. Indexes help speed up SELECT statements.

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Reynalda

2 months ago

I think creating indexes on PolarDB can improve query efficiency.

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