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Wgu C175/D426 Data Management
Foundations Oa Exam Actual Exam
2026 Latest Versions 200 Questions
And Correct Verified Answers Already
Graded A
Question 1
Which requirement within large, complex databases ensures users have
limited access to the database?
A) Recovery
B) Performance
C) Authorization
D) Confidentiality
Correct Answer: C) Authorization
Rationale: Authorization ensures that users have appropriate permissions
and limited access to database resources based on their roles.
Question 2
Which design type specifies database requirements without regard to a
specific database system?
A) Physical design
B) Conceptual design
C) Logical design
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D) Abstract design
Correct Answer: B) Conceptual design
Rationale: Conceptual design focuses on identifying and describing data
requirements independently of any specific database management system.
Question 3
What characterizes the rules of relational databases?
A) They are logical constraints that ensure the data is valid.
B) They are based on business policy and specific databases.
C) They represent data volumes and rapidly changing data structures.
D) They embody the theoretical foundation of the SQL language.
Correct Answer: A) They are logical constraints that ensure the data is valid.
Rationale: Relational database rules are logical constraints that maintain
data integrity and validity.
Question 4
Which event will result in an error code and error description when using
MySQL Server?
A) When the server or updates are incorrectly installed
B) When an SQL statement is entered to locate errors in the database
C) When an SQL statement is syntactically incorrect
D) When the database connection is lost
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Correct Answer: C) When an SQL statement is syntactically incorrect
Rationale: MySQL Server returns error codes and descriptions when SQL
syntax errors occur during statement execution.
Question 5
What is the primary purpose of a primary key in a relational database?
A) To create relationships between tables
B) To uniquely identify each row in a table
C) To improve query performance
D) To enforce data type constraints
Correct Answer: B) To uniquely identify each row in a table
Rationale: A primary key ensures that each record in a table can be uniquely
identified and accessed.
Question 6
Which type of relationship is represented by a foreign key?
A) One-to-one
B) One-to-many
C) Many-to-many
D) All of the above
Correct Answer: D) All of the above
Rationale: Foreign keys can represent one-to-one, one-to-many, and many-
to-many relationships through junction tables.
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Question 7
What does ACID stand for in database transactions?
A) Atomicity, Consistency, Isolation, Durability
B) Accuracy, Consistency, Integrity, Durability
C) Atomicity, Concurrency, Isolation, Dependency
D) Accuracy, Concurrency, Integrity, Dependency
Correct Answer: A) Atomicity, Consistency, Isolation, Durability
Rationale: ACID properties ensure reliable processing of database
transactions.
Question 8
Which SQL statement is used to retrieve data from a database?
A) GET
B) SELECT
C) EXTRACT
D) RETRIEVE
Correct Answer: B) SELECT
Rationale: The SELECT statement is used to query and retrieve data from
database tables.
Question 9
What is a foreign key constraint used for?
Wgu C175/D426 Data Management
Foundations Oa Exam Actual Exam
2026 Latest Versions 200 Questions
And Correct Verified Answers Already
Graded A
Question 1
Which requirement within large, complex databases ensures users have
limited access to the database?
A) Recovery
B) Performance
C) Authorization
D) Confidentiality
Correct Answer: C) Authorization
Rationale: Authorization ensures that users have appropriate permissions
and limited access to database resources based on their roles.
Question 2
Which design type specifies database requirements without regard to a
specific database system?
A) Physical design
B) Conceptual design
C) Logical design
,2 | Page
D) Abstract design
Correct Answer: B) Conceptual design
Rationale: Conceptual design focuses on identifying and describing data
requirements independently of any specific database management system.
Question 3
What characterizes the rules of relational databases?
A) They are logical constraints that ensure the data is valid.
B) They are based on business policy and specific databases.
C) They represent data volumes and rapidly changing data structures.
D) They embody the theoretical foundation of the SQL language.
Correct Answer: A) They are logical constraints that ensure the data is valid.
Rationale: Relational database rules are logical constraints that maintain
data integrity and validity.
Question 4
Which event will result in an error code and error description when using
MySQL Server?
A) When the server or updates are incorrectly installed
B) When an SQL statement is entered to locate errors in the database
C) When an SQL statement is syntactically incorrect
D) When the database connection is lost
,3 | Page
Correct Answer: C) When an SQL statement is syntactically incorrect
Rationale: MySQL Server returns error codes and descriptions when SQL
syntax errors occur during statement execution.
Question 5
What is the primary purpose of a primary key in a relational database?
A) To create relationships between tables
B) To uniquely identify each row in a table
C) To improve query performance
D) To enforce data type constraints
Correct Answer: B) To uniquely identify each row in a table
Rationale: A primary key ensures that each record in a table can be uniquely
identified and accessed.
Question 6
Which type of relationship is represented by a foreign key?
A) One-to-one
B) One-to-many
C) Many-to-many
D) All of the above
Correct Answer: D) All of the above
Rationale: Foreign keys can represent one-to-one, one-to-many, and many-
to-many relationships through junction tables.
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Question 7
What does ACID stand for in database transactions?
A) Atomicity, Consistency, Isolation, Durability
B) Accuracy, Consistency, Integrity, Durability
C) Atomicity, Concurrency, Isolation, Dependency
D) Accuracy, Concurrency, Integrity, Dependency
Correct Answer: A) Atomicity, Consistency, Isolation, Durability
Rationale: ACID properties ensure reliable processing of database
transactions.
Question 8
Which SQL statement is used to retrieve data from a database?
A) GET
B) SELECT
C) EXTRACT
D) RETRIEVE
Correct Answer: B) SELECT
Rationale: The SELECT statement is used to query and retrieve data from
database tables.
Question 9
What is a foreign key constraint used for?
