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Listening Quiz: Rà Soát Lược Đồ Kho Dữ Liệu – Advanced Level
Th8 8, 2024
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bởi
Anna Phạm
trong
Tiếng Anh dành cho Nhà khoa học dữ liệu (English for Data Scientist)
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1.
What are Sophia and William mainly discussing?
The design of a marketing brochure
A data warehouse schema and related improvements
A software bug in the accounting system
How to build a new sales team
Explanation:
They review a new data warehouse schema, including the fact table, dimensions, star schema design, indexes, and ETL process.
2.
What does William say about the star schema design?
It fits well for their reporting needs
It does not fit their reporting needs
It should be replaced immediately
It only works for small databases
Explanation:
William says, “It fits well for our reporting needs.”
3.
What does William suggest about data update frequency?
They need to refresh data only when errors appear
They should update data manually each week
They can schedule incremental loads daily
They should stop updating the warehouse
Explanation:
William responds that they can schedule incremental loads daily.
4.
What can be inferred about the current schema review?
There are several areas that may need improvement
The ETL process is not being used at all
Sophia is only interested in the table names
Everything is already perfect and no changes are needed
Explanation:
They discuss possible redundancy, normalization, optimization of indexes, and validation rules, which suggests several areas may need improvement.
5.
What concern does William mention about data risks?
The tables are too small for reporting
The schema cannot support daily loads
The database may lose all records during backups
Some edge cases might cause nulls
Explanation:
William says that some edge cases might cause nulls.
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