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Listening Quiz: Thảo luận về nút thắt cổ chai trong hiệu suất truy vấn cơ sở dữ liệu – Easy Level
Th10 25, 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 conversation mainly about?
A discussion about ways to improve database query performance
A lesson on how to write software code
A meeting to choose a new database provider
A report about a power outage in the office
Explanation:
William and Jessica discuss why some queries are slow and ways to speed them up, such as adding indexes, optimizing query structure, and checking logs.
2.
According to Jessica, what causes the slow query speed?
Many users run big queries at the same time
The database has too many stored files
The indexes were removed from the database
The server is turned off during business hours
Explanation:
Jessica says the database is busy and that many users run big queries at the same time.
3.
What does Jessica say about adding indexes?
It reduces the number of users in the system
It uses more space but helps speed up queries
It deletes old logs automatically
It makes the database smaller and slower
Explanation:
Jessica says adding indexes will use more space but help speed up queries.
4.
What can be inferred about the database right now?
It is currently experiencing heavy use
It only accepts small queries
It has no slow queries at all
It cannot be improved further
Explanation:
Jessica says the database is busy and many users are running big queries at the same time, which suggests heavy use.
5.
How do William and Jessica check which queries are slow?
They ask each user to report errors directly
They compare the database with another company’s system
They restart the database every hour
They use logs to check query times and errors
Explanation:
Jessica says they use logs to check query times and errors.
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