Real Data-Management-Foundations Dumps & Data-Management-Foundations Training For Exam
Real Data-Management-Foundations Dumps & Data-Management-Foundations Training For Exam
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WGU Data-Management-Foundations Training For Exam & Exam Dumps Data-Management-Foundations Zip
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WGU Data Management – Foundations Exam Sample Questions (Q48-Q53):
NEW QUESTION # 48
What is the last step in the logical design process for designing a database?
- A. Analyze data requirements
- B. Apply a normal form
- C. Discover entities
- D. Determine cardinality
Answer: B
Explanation:
Thelogical design phasein database development focuses onstructuring data efficientlyto eliminate redundancy and ensure integrity. Thefinal step in logical designis toapply normalization (normal forms)to optimize the database schema.
Steps in Logical Database Design:
* Discover entities# Identify real-world objects (e.g., Customers, Orders).
* Determine cardinality# Define relationships between entities (one-to-one, one-to-many).
* Analyze data requirements# Determine the attributes each entity needs.
* Apply normal forms# Eliminate redundancy and improve data consistency.
Example Usage:
* After identifying entities likeStudentsandCourses, applying3rd Normal Form (3NF)ensures that data isorganized without redundancy.
Why Other Options Are Incorrect:
* Option A (Analyze data requirements) (Incorrect):Doneearlierto define attributes.
* Option C (Determine cardinality) (Incorrect):Donebeforenormalization to establish relationships.
* Option D (Discover entities) (Incorrect):Done at thebeginningof database design.
Thus, the correct answer isApply a normal form, as normalization is thelast step in logicaldesign.
NEW QUESTION # 49
Which action does the % operator accomplish in MySQL?
- A. Subtracts a numeric value from another
- B. Raises a numeric value to the power of another
- C. Divides two numeric values and returns the remainder
- D. Compares two numeric values for equality
Answer: C
Explanation:
The % operator in MySQL is known as themodulus operator. It returns theremainderof a division operation between two numbers.
Example:
sql
SELECT 10 % 3; -- Output: 1 (10 divided by 3 gives remainder 1)
* Option A (Incorrect):Raising a number to a power is done using the POW() function or