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Questions and Answers
What is the purpose of the logical design phase?
What is the purpose of the logical design phase?
- To convert logical design into physical design
- To arrange the data into a series
- To define a model for the data warehouse (correct)
- To select entities, attributes, and relationships in a model
What is the primary unique identifier converted to during the physical design phase?
What is the primary unique identifier converted to during the physical design phase?
- Foreign key constraints
- Columns
- Primary key constraints (correct)
- Tables
What does the physical design phase deal with?
What does the physical design phase deal with?
- Selecting entities, attributes, and relationships in a model
- Defining a model for the data warehouse
- Storing and retrieving data effectively (correct)
- Arranging the data into a series
What is used to distinguish between one instance of an entity and another?
What is used to distinguish between one instance of an entity and another?
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What does the logical design phase involve checking?
What does the logical design phase involve checking?
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Study Notes
Logical Design Phase Purpose
- To translate user requirements into a logical model, independent of specific technologies
- Focuses on entities, attributes, and relationships, creating an abstract representation of data
Physical Design Phase Conversion
- Logical model is translated into a physical model
- Primary unique identifier from the logical model is converted to a physical model
- Physical model considers specific database management system and hardware constraints
Physical Design Phase Considerations
- Specific database management system
- Hardware and software limitations
- Storage structures and access methods
Distinguishing Entities
- Primary Key: A unique identifier used to distinguish between instances of an entity
- Ensures data integrity and efficient data access
Logical Design Phase Checks
- Data dependencies
- Data integrity
- Data consistency
- Data completeness
- Data accuracy
- Data security
- Data recovery
- Data performance
- Data scalability
- Data usability
- Data maintainability
- Data availability
- Data reliability
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Description
Test your knowledge on logical and physical design for data warehouse, including table and fact table design, and implementing effective physical data structure. This quiz covers essential concepts for designing and optimizing data warehouses.
