Welcome to the Importance of Data Quality MCQs Page

Dive deep into the fascinating world of Importance of Data Quality with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Importance of Data Quality, a crucial aspect of Data Warehousing and OLAP. In this section, you will encounter a diverse range of MCQs that cover various aspects of Importance of Data Quality, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Data Warehousing and OLAP.

Check out the MCQs below to embark on an enriching journey through Importance of Data Quality. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Data Warehousing and OLAP.

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Importance of Data Quality MCQs | Page 7 of 10

Explore more Topics under Data Warehousing and OLAP

01

The Compelling Need for Data Warehousing

02

Building Blocks of Data Warehouse 🔒

03

Trends in Data Warehousing 🔒

04

Planning and Project Management 🔒

05

Defining the Business Requirements

06

Requirements as the Driving Force for Data warehousing 🔒

07

Architectural Components 🔒

08

Infrastructure as the Foundation for Data Warehousing 🔒

09

Role of Metadata in Data Warehousing 🔒

10

Principles of Dimensional Modeling

11

Advanced Topics in Dimensional Modeling 🔒

12

Data Extraction,Transformation and Loading 🔒

13

Matching Information to the Classes of Users

14

OLAP in the Data Warehouse 🔒

15

Data Warehousing and the Web 🔒

16

Data Mining Basics 🔒

17

The Physical Design Process 🔒

18

Data Warehouse Deployment 🔒

19

Growth and Maintenance

20

Important Terms and Definitions

Q61.

What is the purpose of "Update Security" in the database management system for data quality control?

Prevent entry of data outside defined limits

Prevent unauthorized updates to the databases

Ensure that duplicate records with the same primary key value are not entered

Ensure that nulls are not allowed in mandatory fields

Discuss

Answer: (b).Prevent unauthorized updates to the databases Explanation:"Update Security" in the database management system helps prevent unauthorized updates to the databases.

Q62.

What does "Conformance to Business Rules" in the database management system involve?

Preventing entry of data outside defined limits

Ensuring that nulls are not allowed in mandatory fields

Using trigger programs and stored procedures to enforce business rules

Preventing unauthorized updates to the databases

Discuss

Answer: (c).Using trigger programs and stored procedures to enforce business rules Explanation:"Conformance to Business Rules" in the database management system involves using trigger programs and stored procedures to enforce business rules.

Q63.

Why do some companies resist data cleansing initiatives?

Data cleansing is quick and easy

Metadata for source systems is well-documented

Users have plenty of time to focus on data quality

Data cleansing is tedious, time-consuming, and lacks proper documentation

Discuss

Answer: (d).Data cleansing is tedious, time-consuming, and lacks proper documentation Explanation:Some companies resist data cleansing initiatives because data cleansing is often considered tedious, time-consuming, and lacks proper documentation.

Q64.

What is the "clean as you go" approach to data cleansing in the context of a data warehouse?

Data cleansing is performed before loading any data into the warehouse

Only data with 100% quality is loaded into the data warehouse

Data is loaded into the data warehouse as is, and cleansing is done later

Data cleansing is performed during the data extraction process

Discuss

Answer: (c).Data is loaded into the data warehouse as is, and cleansing is done later Explanation:The "clean as you go" approach involves loading data into the data warehouse as is, and cleansing is done at a later time.

Q65.

What is one of the drawbacks of the "clean as you go" approach to data cleansing?

It takes a while to detect incorrect data

It results in 100% data quality

It requires a significant amount of effort

Data cleansing activities are quick and easy

Discuss

Answer: (a).It takes a while to detect incorrect data Explanation:One drawback of the "clean as you go" approach is that it takes a while to detect incorrect data.

Q66.

What principle should be applied when determining the extent of data cleansing for a data warehouse?

Absolute data quality

Realistic and practical data quality

Excessive data cleansing

Incomplete data cleansing

Discuss

Answer: (b).Realistic and practical data quality Explanation:The principle of "fitness-for-purpose" suggests that data cleansing should be realistic and practical, considering the specific needs of the data warehouse.

Q67.

What fundamental question must be answered when deciding which data to cleanse?

How to clean the data

Where to clean the data

When to clean the data

Which data to cleanse

Discuss

Answer: (d).Which data to cleanse Explanation:The fundamental question to be answered is "Which Data to Cleanse?"

Q68.

Where in the data flow process can data cleansing be applied?

Only in the data warehouse

Only in the source systems

In the staging area, source systems, or data warehouse

Only in the staging area

Discuss

Answer: (c).In the staging area, source systems, or data warehouse Explanation:Data cleansing can be applied in the staging area, source systems, or data warehouse, depending on the chosen strategy.

Q69.

What is a drawback of cleansing data in the staging area?

Reduced costs of bad data in the source systems

Improved alignment between reports from source systems and the data warehouse

Continual inflow of data pollution from source systems

Ease of data extraction

Discuss

Answer: (c).Continual inflow of data pollution from source systems Explanation:A drawback of cleansing data in the staging area is that data pollution continues to flow from the source systems.

Q70.

Why is cleansing data in the source systems a complex task?

Proper documentation and source code availability

Lower costs and higher efficiency

Simplified data extraction

Lack of documentation and unavailability of source code

Discuss

Answer: (d).Lack of documentation and unavailability of source code Explanation:Cleansing data in the source systems can be complex due to the lack of proper documentation and the unavailability of source code for production programs.

Page 7 of 10

Building Blocks of Data Warehouse 🔒

Trends in Data Warehousing 🔒

Planning and Project Management 🔒

Requirements as the Driving Force for Data warehousing 🔒

Architectural Components 🔒

Infrastructure as the Foundation for Data Warehousing 🔒

Role of Metadata in Data Warehousing 🔒

Advanced Topics in Dimensional Modeling 🔒

Data Extraction,Transformation and Loading 🔒

OLAP in the Data Warehouse 🔒

Data Warehousing and the Web 🔒

Data Mining Basics 🔒

The Physical Design Process 🔒

Data Warehouse Deployment 🔒

Welcome to the Importance of Data Quality MCQs Page

Importance of Data Quality MCQs | Page 7 of 10

Explore more Topics under Data Warehousing and OLAP

The Compelling Need for Data Warehousing

Defining the Business Requirements

Principles of Dimensional Modeling

Matching Information to the Classes of Users

Growth and Maintenance

Important Terms and Definitions

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