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WGU C175/D426 DATA MANAGEMENT FOUNDATIONS OA FINAL
EXAM QUESTIONS WITH DETAILED- VERIFIED ANSWERS- ALREADY
GRADED A+ || NEWEST EXAM 2025-2026
Information Technology (IT) / Database Management
The exam covers: database fundamentals (DBMS, schemas, metadata), data
modeling (ERD, cardinality, modality, keys), SQL (DML, DDL, joins,
aggregations, subqueries), normalization (1NF‑3NF, anomalies, functional
dependencies), database administration (transactions, ACID, indexing, views,
security), data warehousing (ETL, star/snowflake schemas, OLAP), NoSQL
concepts, and data governance. Emphasizes relational theory, integrity
constraints, and practical query writing
DOMAIN 1 – DATABASE FUNDAMENTALS
1. What is the broad definition of data?
A) Numbers captured on digital media only
B) Raw facts captured on printed or digital media
C) Alphanumeric combinations a computer can read
D) Any information transferred from print to digital
CORRECT ANSWER: B
Rationale: Data is defined as raw, unprocessed facts that can be captured on
any medium (printed or digital). The other options are too narrow.
2. Which characteristic distinguishes unstructured data?
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A) It cannot be copied and pasted.
B) It is easily queried by business applications.
C) It does not follow a data model.
D) It is stored in rows and columns.
CORRECT ANSWER: C
Rationale: Unstructured data (e.g., emails, videos) lacks a predefined data
model or schema.
3. Which statement about flat files is true?
A) They contain no internal hierarchical organization.
B) They have a limit of 256 records.
C) They can only contain two‑dimensional data.
D) They are always encrypted.
CORRECT ANSWER: A
Rationale: Flat files have no internal hierarchy or structural relationships;
they are simple sequential files.
4. How was data retrieved before DBMSs?
A) Randomly from linked files
B) Sequentially from simple files
C) Using set operations on complex files
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D) Using relationships between logical entities
CORRECT ANSWER: B
Rationale: File‑based systems accessed data sequentially, which was slow
and inflexible.
5. Which two benefits does a DBMS provide for working with data? (Select
two.)
A) Enables data sharing
B) Duplicates redundant data for security
C) Permits storage of vast volumes of data
D) Increases the complexity of data organization
CORRECT ANSWERS: A and C
Rationale: A DBMS allows concurrent data sharing and can handle very large
datasets.
6. What is the primary role of a DBMS?
A) To store data in operating system files
B) To provide an interface for defining, creating, querying, updating, and
administering databases
C) To replace all spreadsheets
D) To compile Java programs
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CORRECT ANSWER: B
Rationale: A DBMS is software that manages data, enabling definition,
manipulation, and administration.
7. Which component interprets SQL queries and generates an execution
plan?
A) Storage Manager
B) Transaction Manager
C) Query Processor
D) Authorization Module
CORRECT ANSWER: C
Rationale: The Query Processor parses, optimizes, and executes queries.
8. The Transaction Manager is responsible for enforcing which set of
properties?
A) CRUD
B) ACID
C) BASE
D) DDL
CORRECT ANSWER: B
Rationale: The Transaction Manager ensures Atomicity, Consistency,
Isolation, and Durability for transactions.
WGU C175/D426 DATA MANAGEMENT FOUNDATIONS OA FINAL
EXAM QUESTIONS WITH DETAILED- VERIFIED ANSWERS- ALREADY
GRADED A+ || NEWEST EXAM 2025-2026
Information Technology (IT) / Database Management
The exam covers: database fundamentals (DBMS, schemas, metadata), data
modeling (ERD, cardinality, modality, keys), SQL (DML, DDL, joins,
aggregations, subqueries), normalization (1NF‑3NF, anomalies, functional
dependencies), database administration (transactions, ACID, indexing, views,
security), data warehousing (ETL, star/snowflake schemas, OLAP), NoSQL
concepts, and data governance. Emphasizes relational theory, integrity
constraints, and practical query writing
DOMAIN 1 – DATABASE FUNDAMENTALS
1. What is the broad definition of data?
A) Numbers captured on digital media only
B) Raw facts captured on printed or digital media
C) Alphanumeric combinations a computer can read
D) Any information transferred from print to digital
CORRECT ANSWER: B
Rationale: Data is defined as raw, unprocessed facts that can be captured on
any medium (printed or digital). The other options are too narrow.
2. Which characteristic distinguishes unstructured data?
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A) It cannot be copied and pasted.
B) It is easily queried by business applications.
C) It does not follow a data model.
D) It is stored in rows and columns.
CORRECT ANSWER: C
Rationale: Unstructured data (e.g., emails, videos) lacks a predefined data
model or schema.
3. Which statement about flat files is true?
A) They contain no internal hierarchical organization.
B) They have a limit of 256 records.
C) They can only contain two‑dimensional data.
D) They are always encrypted.
CORRECT ANSWER: A
Rationale: Flat files have no internal hierarchy or structural relationships;
they are simple sequential files.
4. How was data retrieved before DBMSs?
A) Randomly from linked files
B) Sequentially from simple files
C) Using set operations on complex files
, Page 3 of 86
D) Using relationships between logical entities
CORRECT ANSWER: B
Rationale: File‑based systems accessed data sequentially, which was slow
and inflexible.
5. Which two benefits does a DBMS provide for working with data? (Select
two.)
A) Enables data sharing
B) Duplicates redundant data for security
C) Permits storage of vast volumes of data
D) Increases the complexity of data organization
CORRECT ANSWERS: A and C
Rationale: A DBMS allows concurrent data sharing and can handle very large
datasets.
6. What is the primary role of a DBMS?
A) To store data in operating system files
B) To provide an interface for defining, creating, querying, updating, and
administering databases
C) To replace all spreadsheets
D) To compile Java programs
, Page 4 of 86
CORRECT ANSWER: B
Rationale: A DBMS is software that manages data, enabling definition,
manipulation, and administration.
7. Which component interprets SQL queries and generates an execution
plan?
A) Storage Manager
B) Transaction Manager
C) Query Processor
D) Authorization Module
CORRECT ANSWER: C
Rationale: The Query Processor parses, optimizes, and executes queries.
8. The Transaction Manager is responsible for enforcing which set of
properties?
A) CRUD
B) ACID
C) BASE
D) DDL
CORRECT ANSWER: B
Rationale: The Transaction Manager ensures Atomicity, Consistency,
Isolation, and Durability for transactions.
