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Exam Data-Management-Foundations Topic 1 Question 1 Discussion

Actual exam question for WGU's Data-Management-Foundations exam
Question #: 1
Topic #: 1
What is information independence?

Suggested Answer: D Vote an answer

Information independencerefers to theseparation between data storage and data access. It allows a database'slogical structureto be modifiedwithout affecting existing applications.
Types of Information Independence:
* Logical Data Independence# Ability to change theconceptual schema(e.g., renaming columns, adding new attributes)without modifying applications.
* Physical Data Independence# Ability to change thephysical storage structure(e.g., indexing, partitioning)without affecting queries.
Example of Logical Data Independence:
* Anew columnis added to the Customers table, but existing queriesstill work without modification.
Example of Physical Data Independence:
* Data is moved to SSD storagefor performance improvement, but queriesrun the same way.
Why Other Options Are Incorrect:
* Option A (Incorrect):Changing thedatabase type(e.g., MySQL to PostgreSQL) isnotinformation independence.
* Option B (Incorrect):Making changes toqueriesis unrelated to database independence.
* Option C (Incorrect):Interchanging databases is related todata portability, notinformation independence.
Thus, the correct answer isD - An ability to change the organization of data, asinformation independence ensuresmodifications do not disrupt database operations.

by Susanna at Oct 31, 2025, 07:46 AM

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Here are all the actual test exam dumps for IT exams. Most people prepare for the actual exams with our test dumps to pass their exams. So it's critical to choose and actual test pdf to succeed.

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