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CompTIA Exam DA0-001 Topic 2 Question 27 Discussion

Actual exam question for CompTIA's DA0-001 exam
Question #: 27
Topic #: 2
[All DA0-001 Questions]

A database consists of one fact table that is composed of multiple dimensions. Each dimension is represented by a denormalized table. This structure is an example of a:

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Suggested Answer: D

A star schema is a type of database schema that consists of one fact table and multiple dimension tables. The fact table contains the measures or metrics of the business process, such as sales, orders, or transactions. The dimension tables contain the attributes or characteristics of the business entities, such as products, customers, or locations. The fact table is connected to the dimension tables by foreign keys that reference the primary keys of the dimension tables.The fact table is located at the center of the schema, while the dimension tables are located at the edges, forming a star-like shape1.

A star schema is an example of a denormalized schema, which means that the dimension tables are not normalized and may contain redundant or repeated data. This is done to improve the performance and simplicity of queries, as there are fewer joins and tables involved.A star schema is suitable for data warehouses and business intelligence applications that require fast and efficient data retrieval2.


by Fletcher at Feb 13, 2024, 03:37 AM

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Nieves
6 months ago
I think it's A) non-relational schema because it doesn't follow the relational model.
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Renato
6 months ago
I'm leaning towards C) snowflake schema because it has normalized dimensions.
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Aretha
6 months ago
I disagree, I believe it is D) star schema.
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Dyan
6 months ago
I think the answer is B) galaxy schema.
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Martin
7 months ago
Definitely star schema. The other options like non-relational schema and snowflake schema don't quite fit the description provided.
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Jess
7 months ago
Yeah, the star schema is a type of dimensional modeling approach where you have a central fact table surrounded by dimension tables. This allows for efficient querying and analysis.
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Pauline
7 months ago
I agree, the star schema is the correct answer here. The fact table with multiple denormalized dimension tables is a classic star schema design.
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Leana
7 months ago
Hmm, this question seems like it's testing our knowledge of database design patterns. Based on the description, I think the answer is D) star schema.
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