Data Warehousing and Data Mining · Unit 1
Data Warehouse Fundamentals
Exam-focused notes for Data Warehouse Fundamentals (Data Warehousing and Data Mining, BIT454): what the TU syllabus asks and how it has actually been tested, with 5 solved past questions from this unit.
What this unit covers
- Data warehouse definition and characteristics
- Operational database vs data warehouse
- Data warehouse components and architecture
- Data warehouse conceptual modeling techniques
- OLAP technology and multidimensional analysis
- Full cube and closed cube concepts
- Beam search mechanism
Operational database vs data warehouse
Differentiate between data warehouse and operational database. [5]
Aspect Operational Database Data Warehouse ----------------------------------------------- Purpose Supports day-to-day business operations and transactions Supports analytical queries and decision-making Data Nature Current, real-time operational data Histo...
Full solved answer →OLAP technology and multidimensional analysis
Write short notes on: (a) OLAP (b) Laplace Smoothing [5]
Definition: OLAP is a technology that enables users to quickly analyze summarized and consolidated data from a data warehouse or data mart using multidimensional views. Key Characteristics: - Supports complex analytical queries on large volumes of historica...
Full solved answer →Beam search mechanism
Define full cube. Discuss the working mechanism of beam search. [5]
A full cube in the context of data warehousing and OLAP (Online Analytical Processing) refers to a complete multidimensional data structure where all possible combinations of dimension members are materialized and stored with their corresponding aggregate v...
Full solved answer →Data warehouse conceptual modeling techniques
Explain any two conceptual modeling techniques of data warehousing. [5]
Conceptual modeling in data warehousing involves designing the logical structure of data to support analytical queries and decision-making. Two major techniques are: --- Definition: The star schema is a denormalized database design where a central fact tabl...
Full solved answer →Full cube and closed cube concepts
Differentiate between full cube and closed cube. [5]
A full cube is a 3D representation of a cube where all six faces are visible in the isometric or orthographic projection. It shows the complete structure of the cube with: - Top face visible - Front face visible - Right side face visible - All three visible...
Full solved answer →Make Unit 1 stick
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