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Huawei Exam H13-922 Topic 1 Question 72 Discussion

Actual exam question for Huawei's H13-922 exam
Question #: 72
Topic #: 1
[All H13-922 Questions]

(Judgment) In the MVCC mode, when each transaction retrieves data, it only sees a snapshot of the data some time ago, not the latest state of the data.

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Suggested Answer: A, D

by Emerson at Jul 12, 2024, 10:46 AM

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Tesha
8 months ago
Haha, who needs distribution columns when you can just store all your data on a floppy disk? That's the real performance hack!
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Kelvin
7 months ago
B) Columns with fewer values are suitable as distribution columns, which can ensure that the data distribution is relatively concentrated.
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Jaime
7 months ago
A) Normally, the primary key of the table is selected as the distribution column.
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Aliza
8 months ago
C looks good to me! Targeting a specific name in the filter means the name column should be the distribution column. Easy peasy!
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Jarod
7 months ago
C) The filter condition of the query is name = 'wang five', so the name column should be used as the distribution column.
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Farrah
8 months ago
B) Columns with fewer values are suitable as distribution columns, which can ensure that the data distribution is relatively concentrated.
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Clorinda
8 months ago
A) Normally, the primary key of the table is selected as the distribution column.
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Rosalind
8 months ago
I agree with Nettie, A makes more sense as the distribution column.
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Leota
9 months ago
I think C could also be a valid option, depending on the query.
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Elenore
9 months ago
Hmm, I'm not sure. This question is making my head spin. Maybe I should have studied more probability distributions instead of binge-watching that new Netflix show.
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Carlota
9 months ago
D is the way to go! Join conditions are the key to efficient data distribution for complex queries.
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Laquita
9 months ago
I think B is the correct answer. Columns with fewer values can be better distributed across the nodes, improving query performance.
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Dusti
7 months ago
I agree, B is the correct answer for better query performance.
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Hassie
8 months ago
B) Columns with fewer values are suitable as distribution columns, which can ensure that the data distribution is relatively concentrated.
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Pedro
8 months ago
A) Normally, the primary key of the table is selected as the distribution column.
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Nettie
9 months ago
I disagree, I believe A is the correct choice.
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Corrie
9 months ago
I think the correct answer is B.
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