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Alibaba Exam ACA-Operator Topic 6 Question 57 Discussion

Actual exam question for Alibaba's ACA-Operator exam
Question #: 57
Topic #: 6
[All ACA-Operator Questions]

When you use SQL statements to access tables in a database without an index configured, a full table scan will be performed. If a table contains a large amount of data, this kind of scan will access a large amount of data and consume a lot of the database's resources. Which of the following options are best practices when creating database indexes? (Number of correct answers: 3)

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Suggested Answer: A, C, D

by Mitsue at Apr 24, 2024, 04:20 PM

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Carmela
10 months ago
I find option E to be helpful as well, it can improve index efficiency.
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Tamesha
10 months ago
I also believe that option D is important to consider when creating indexes.
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Paul
11 months ago
I agree with option A is crucial for optimizing database access.
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Paulina
11 months ago
I think option A is a best practice because it helps improve query performance.
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Latosha
11 months ago
That's important for optimizing the use of indexes.
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Gilberto
11 months ago
And don't forget to adhere to the rightmost prefix principle when using composite indexes.
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Buffy
11 months ago
Yes, that's also a good practice to consider. It helps with performance.
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Lorean
11 months ago
What about applying indexing to fields of fixed length?
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Latosha
11 months ago
I believe that is correct, to prevent overhead on the database.
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Francine
11 months ago
Do you think a table should not have more than 6 indexed fields?
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Buffy
11 months ago
Yes, that's another good practice to follow.
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Gilberto
11 months ago
I also remember that applying indices to fields with many records is important, correct?
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Lorean
11 months ago
Yes, that's one of the best practices for creating database indexes.
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Francine
11 months ago
I think adding an index to frequently queried fields is important, right?
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