FUNDAMENTALS OF COMPUTER

DATABASE FUNDAMENTALS

DATA WAREHOUSING AND DATA MINING

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The generalization of cross-tab which is represented visually is ____ which is also called as data cube.
A
Two dimensional cube
B
Multidimensional cube
C
N-dimensional cube
D
Cuboid
Explanation: 

Detailed explanation-1: -Answer. The generalization of cross-tab which is represented visually is two dimensional cube which is also called as data cube .

Detailed explanation-2: -What is a Data Cube? A data cube (also called a business intelligence cube or OLAP cube) is a data structure optimized for fast and efficient analysis. It enables consolidating or aggregating relevant data into the cube and then drilling down, slicing and dicing, or pivoting data to view it from different angles.

Detailed explanation-3: -A database dimension is a collection of related objects, called attributes, which can be used to provide information about fact data in one or more cubes. For example, typical attributes in a product dimension might be product name, product category, product line, product size, and product price.

Detailed explanation-4: -1 Answer. For explanation: The slice operation selects one particular dimension from a given cube and provides a new sub-cube. Dice selects two or more dimensions from a given cube and provides a new sub-cube.

Detailed explanation-5: -A cube is a multidimensional structure that contains information for analytical purposes; the main constituents of a cube are dimensions and measures. Dimensions define the structure of the cube that you use to slice and dice over, and measures provide aggregated numerical values of interest to the end user.

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