Data Warehousing and Mining Mcqs

Our collections of Multiple choice questions and answers focuses on study of ” Data Warehousing and Mining “. These questions are chosen from a collection of most authoritative and best reference books on DBMS. Our aim is to prepare an individual for competitive exams like NTS | GAT | ECAT | Data Warehouse jobs | Data Mining | DB administration jobs | Nadra Jobs | Software House and Data Base and Web Developer jobs | University and College entrance exams and various tests and job interviews. One should practice our Mcqs to assimilate knowledge on Data Warehousing and Mining comprehensively.

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A BI reporting system does not ________ .

Create meaningful information

Deliver information to users on a timely basis

Use statistical procedures to predict future events

Use disparate data sources

Which of the following are not done by Business Intelligence (BI) systems?

Analyze past and current activities only

Process and record transactions only

Both of the above are correct.

Neither of the above is correct.

Business Intelligence (BI) systems do not obtain their data by which of the following means?

Read and process data from an operational database

Process transactions

Process extracts from operational databases

Process data purchased from data vendors

The “curse of dimensionality” relates to which problem of using operational data for BI reporting?

Dirty data

Inconsistent data

Too much data

Non-integrated data

A report generated by a reporting system is delivered to the appropriate users via a user-accessed Web site. This system uses which of the following report modes?





We have Market Basket data for 1,000 rental transactions at a Video Store. There are for videos for rent — Video A, Video B, Video C and Video D. The probability that both Video C and Video D are rented at the same time is known as ________ .

The basic probability




Business Intelligence (BI) reporting systems cannot do which of the following operations?

Filter data

Group data

Modify data

Both filter and group data

Which of the following is not a component of a data warehouse?

Data extraction/cleaning/preparation programs

Data warehouse data

Data metadata

None of the above are data warehouse components.

Business Intelligence (BI) reporting analyses can be performed using ________ .

Standard SQL only

Extensions to SQL only

OLAP only

Both standard SQL and extensions to SQL

The reports generated by a reporting system are usually not delivered in which of the following media?

Web portal

Commercial courier service

Digital dashboard


Data mining applications are used accomplish which of the following tasks?

Process transactions only

Do RFM analysis only

Do what-if analysis only

Do both RFM and what-if analysis

Which of the following is an unsupervised data mining technique?

Cluster analysis only

Regression Analysis only

RFM Analysis only

Both Regression Analysis and RFM Analysis

In OLAP, we are interested in ________ .

Levels only

Dimensions only

Measures only

Measures and dimensions

Which of the following is not a reason that operational data are difficult to read?

Non-duplicated data

Dirty data

Missing values

Non-integrated data

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