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Basics of OLAP Operations Quiz

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Questions and Answers

What is the main benefit of Online Analytical Processing (OLAP) servers?

Fast, consistent, and interactive access to information (correct)

Real-time data processing

Limited access for managers and analysts

Slow and inconsistent access to information

Which of the following is NOT an OLAP operation as mentioned in the text?

Roll-up

Pivot (rotate)

Drill-down

Data cleansing (correct)

How does Roll-up operation work in OLAP?

By climbing up a concept hierarchy for a dimension (correct)

By expanding the data cube

By climbing down a concept hierarchy for a dimension

By reducing the dimension of analysis

What are the key OLAP operations based on the multidimensional view of data?

Roll-up, Drill-down, Slice and dice, Pivot (rotate) Signup and view all the answers

How does Roll-up operation in OLAP perform aggregation on a data cube?

By climbing up a concept hierarchy for a dimension or by dimension reduction Signup and view all the answers

What is the purpose of the Online Analytical Processing (OLAP) server?

To provide fast, consistent, and interactive access to information for managers and analysts Signup and view all the answers

Study Notes

Online Analytical Processing (OLAP)

The main benefit of OLAP servers is to provide fast and efficient querying and analysis of data.
The NOT OLAP operation is updating data, as OLAP is primarily designed for querying and analysis, not for modifying data.

OLAP Operations

Key OLAP operations based on the multidimensional view of data include Roll-up, Drill-down, Slice, and Dice.
Roll-up operation works by aggregating data from a detailed level to a more summarized level, reducing the granularity of the data.

Roll-up Operation in OLAP

Roll-up operation performs aggregation on a data cube by collapsing a dimension, reducing the number of dimensions, and aggregating data points along the remaining dimensions.
The purpose of the OLAP server is to provide fast and efficient querying and analysis of data, supporting business intelligence and decision-making.

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Description

Test your knowledge of Online Analytical Processing (OLAP) operations such as Roll-up, Drill-down, Slice and dice, and Pivot. Understand how OLAP servers work based on a multidimensional data model for fast and interactive access to information.