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Listening Quiz: Cải thiện hiệu suất truy vấn bằng việc đánh chỉ mục – Easy Level
Th4 12, 2024
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bởi
Anna Phạm
trong
Tiếng Anh dành cho Kỹ sư phần mềm (English for Software Engineer)
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1.
What is the main topic of the conversation?
Designing a new website layout
Fixing a broken computer network
Improving database query performance with indexing
Training employees for customer service
Explanation:
The speakers discuss how indexing can speed up database queries and which indexes to use.
2.
According to Daniel, which index is good for most queries?
Bitmap index
Hash index
Clustered index
B-tree index
Explanation:
Daniel says, ‘A B-tree index is good for most queries.’
3.
What does Daniel say about hash indexes?
They are good for exact matches
They should never be combined with other indexes
They only help with text searches
They are best for sorting large tables
Explanation:
Daniel explains that hash indexes are good for exact matches.
4.
Why does Daniel say combining indexes can be useful?
Because Olivia wants to use only hash indexes
Because different indexes help different kinds of queries
Because one index always slows the database down
Because query types do not matter
Explanation:
Daniel says combining indexes can improve different queries, which implies different indexes help different kinds of queries.
5.
How do Olivia and Daniel decide which index is best?
By asking the IT department to choose for them
By selecting the index with the shortest name
By looking at query types and data structure
By using the fastest computer available
Explanation:
Daniel says they look at query types and data structure to choose the best index.
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