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Welcome to the Building Blocks of Data Warehouse MCQs Page

Dive deep into the fascinating world of Building Blocks of Data Warehouse with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Building Blocks of Data Warehouse, a crucial aspect of Data Warehousing and OLAP. In this section, you will encounter a diverse range of MCQs that cover various aspects of Building Blocks of Data Warehouse, 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.

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

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Building Blocks of Data Warehouse. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Building Blocks of Data Warehouse MCQs | Page 7 of 10

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Q61.
Why might a data warehouse implementation team choose to use in-house programs for data extraction instead of outside tools?

a.

Lower initial costs

b.

Easier data integration

c.

Faster extraction process

d.

Improved data quality

Discuss
Answer: (a).Lower initial costs Explanation:In-house programs for data extraction may have lower initial costs compared to purchasing outside tools.
Q62.
Where is the source data extracted into after the extraction function in the staging area?

a.

Data warehouse

b.

Legacy platform

c.

Separate physical environment

d.

Source systems

Discuss
Answer: (c).Separate physical environment Explanation:Source data is often extracted into a separate physical environment, such as flat files or a data-staging relational database, before being moved to the data warehouse.
Q63.
What is the primary purpose of data transformation in the context of a data warehouse?

a.

Data extraction from source systems

b.

Data cleansing and standardization

c.

Data loading into the data warehouse

d.

Data querying and analysis

Discuss
Answer: (b).Data cleansing and standardization Explanation:Data transformation involves cleaning, standardizing, and preparing data extracted from various source systems.
Q64.
Why is data transformation for a data warehouse more challenging than for an operational system?

a.

Data warehouse data comes from fewer sources

b.

Data warehouse data is already clean

c.

Data transformation is only required for the initial load

d.

Data warehouse data comes from many disparate sources

Discuss
Answer: (d).Data warehouse data comes from many disparate sources Explanation:Data transformation in a data warehouse is more challenging because data comes from many disparate sources, and ongoing changes must also be managed.
Q65.
What is the primary objective of cleaning data during the data transformation process?

a.

Converting data to a different format

b.

Eliminating duplicates

c.

Resolving synonyms

d.

Summarizing data

Discuss
Answer: (b).Eliminating duplicates Explanation:Cleaning data during data transformation involves tasks like eliminating duplicates.
Q66.
What is semantic standardization in the context of data transformation?

a.

Standardizing data types and field lengths

b.

Resolving synonyms and homonyms

c.

Combining data from multiple source records

d.

Summarizing data

Discuss
Answer: (b).Resolving synonyms and homonyms Explanation:Semantic standardization involves resolving synonyms and homonyms, ensuring that terms from different source systems are handled consistently.
Q67.
Which of the following is NOT a part of data transformation?

a.

Sorting and merging of data

b.

Standardization of data elements

c.

Combining pieces of data from different sources

d.

Purging source data

Discuss
Answer: (d).Purging source data Explanation:Data transformation typically involves cleaning, standardization, combining, and summarizing data, but not purging source data.
Q68.
Why are primary keys in a data warehouse different from those in operational systems?

a.

They are longer in length

b.

They are stored in a separate database

c.

They cannot have built-in meanings

d.

They are generated automatically

Discuss
Answer: (c).They cannot have built-in meanings Explanation:Primary keys in a data warehouse cannot have built-in meanings, as opposed to operational systems.
Q69.
What does the data transformation function include when data needs to be summarized in the data warehouse?

a.

Data cleansing

b.

Standardization of data elements

c.

Resolving synonyms

d.

Appropriate summarization

Discuss
Answer: (d).Appropriate summarization Explanation:Data transformation function includes summarization when data needs to be summarized in the data warehouse.
Q70.
What is the outcome of the data transformation function in the data staging area?

a.

Raw, unprocessed data

b.

Integrated, cleaned, standardized, and summarized data

c.

Data ready for querying and analysis

d.

Data ready for loading into the data warehouse

Discuss
Answer: (b).Integrated, cleaned, standardized, and summarized data Explanation:The data transformation function results in integrated, cleaned, standardized, and summarized data ready for loading into the data warehouse.
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