WGU D288 | 1
WGU D288 — Back-End Programming | Study Guide |
Latest Update 2026/2027 | Practice Questions and Answers
| Exam Review
Table of Contents
1. Spring Framework and Spring Boot Fundamentals
2. Spring Initializr and Project Setup
3. Dependency Injection and Inversion of Control
4. Object-Oriented Programming in Java for Back-End Development
5. Spring Data JPA and Repository Pattern
6. Entity Mapping and Relational Database Design
7. RESTful Web Services and Spring MVC
8. Spring Data REST and Repository Exposure
9. Data Validation and Error Handling
10. Design Patterns in Spring Applications
11. Database Integration with MySQL
12. Services Layer, Checkout Logic, and Transaction Management
13. Testing and Debugging Back-End Applications
14. Security, Configuration, and Deployment
, WGU D288 | 2
Question 1: Which of the following best describes the primary purpose of the Spring
Framework in back-end development?
A) To provide a lightweight container that manages the lifecycle and configuration of
application objects
B) To replace the Java Virtual Machine
C) To serve as a front-end rendering engine
D) To eliminate the need for a relational database
Correct Answer: A) To provide a lightweight container that manages the lifecycle and
configuration of application objects
The Spring Framework is fundamentally an inversion of control (IoC) container that
manages the creation, configuration, and lifecycle of application objects (beans). It does not
replace the JVM, render front-end views, or eliminate the need for databases.
Question 2: What is the primary advantage of using Spring Boot over the traditional Spring
Framework?
A) It eliminates the need for Java
B) It provides auto-configuration and embedded servers to simplify setup
C) It only supports NoSQL databases
D) It removes the need for dependency injection
Correct Answer: B) It provides auto-configuration and embedded servers to simplify
setup
Spring Boot reduces boilerplate configuration by providing auto-configuration, starter
dependencies, and embedded servers (e.g., Tomcat). It does not replace Java, dependency
injection, or limit database choices.
Question 3: Which annotation is used to mark a class as a Spring Boot application entry
point?
A) @SpringBootApplication
B) @Configuration
C) @ComponentScan
D) @EnableAutoConfiguration
Correct Answer: A) @SpringBootApplication
, WGU D288 | 3
@SpringBootApplication is a convenience annotation that combines @Configuration,
@EnableAutoConfiguration, and @ComponentScan. It is placed on the main class to enable
Spring Boot's auto-configuration and component scanning.
Question 4: What does the @RestController annotation indicate in a Spring Boot application?
A) That the class is a RESTful web service controller
B) That the class is a database entity
C) That the class is a repository interface
D) That the class is a configuration class
Correct Answer: A) That the class is a RESTful web service controller
@RestController combines @Controller and @ResponseBody, indicating that the class
handles REST requests and returns data directly as JSON or XML. It is used for RESTful web
service endpoints.
Question 5: Which of the following is a core principle of the Spring Framework?
A) Inversion of Control (IoC)
B) Hard-coded dependencies
C) Monolithic architecture
D) Manual object instantiation
Correct Answer: A) Inversion of Control (IoC)
Inversion of Control is a core principle where the framework controls the flow of the program
and the creation of objects, rather than the application code. This is achieved through
dependency injection.
Question 6: What is the role of the Spring Initializr?
A) To generate a Spring Boot project structure with selected dependencies
B) To compile Java code
C) To deploy applications to production
D) To manage database migrations
Correct Answer: A) To generate a Spring Boot project structure with selected
dependencies
, WGU D288 | 4
Spring Initializr is a web-based tool that generates a Spring Boot project skeleton with the
chosen build system (Maven/Gradle), Java version, and dependencies (e.g., Spring Web,
Spring Data JPA, MySQL Driver, Lombok).
Question 7: Which dependency is required to enable Spring Data JPA in a Spring Boot
project?
A) spring-boot-starter-data-jpa
B) spring-boot-starter-web
C) spring-boot-starter-security
D) spring-boot-starter-test
Correct Answer: A) spring-boot-starter-data-jpa
The spring-boot-starter-data-jpa dependency includes Spring Data JPA, Hibernate, and the
necessary configuration for JPA-based data access. Spring Web is for web applications,
Security for authentication, and Test for testing.
Question 8: What is the purpose of the Lombok library in a Spring Boot project?
A) To reduce boilerplate code by generating getters, setters, constructors, and other methods
B) To provide a web server
C) To manage database connections
D) To handle authentication
Correct Answer: A) To reduce boilerplate code by generating getters, setters,
constructors, and other methods
Lombok is a Java library that uses annotations (e.g., @Data, @Getter, @Setter) to
automatically generate common methods at compile time, reducing boilerplate code in entity
and service classes.
Question 9: Which dependency is required to use MySQL as the database in a Spring Boot
application?
A) mysql-connector-java
B) postgresql
C) h2
D) mongodb-driver
WGU D288 — Back-End Programming | Study Guide |
Latest Update 2026/2027 | Practice Questions and Answers
| Exam Review
Table of Contents
1. Spring Framework and Spring Boot Fundamentals
2. Spring Initializr and Project Setup
3. Dependency Injection and Inversion of Control
4. Object-Oriented Programming in Java for Back-End Development
5. Spring Data JPA and Repository Pattern
6. Entity Mapping and Relational Database Design
7. RESTful Web Services and Spring MVC
8. Spring Data REST and Repository Exposure
9. Data Validation and Error Handling
10. Design Patterns in Spring Applications
11. Database Integration with MySQL
12. Services Layer, Checkout Logic, and Transaction Management
13. Testing and Debugging Back-End Applications
14. Security, Configuration, and Deployment
, WGU D288 | 2
Question 1: Which of the following best describes the primary purpose of the Spring
Framework in back-end development?
A) To provide a lightweight container that manages the lifecycle and configuration of
application objects
B) To replace the Java Virtual Machine
C) To serve as a front-end rendering engine
D) To eliminate the need for a relational database
Correct Answer: A) To provide a lightweight container that manages the lifecycle and
configuration of application objects
The Spring Framework is fundamentally an inversion of control (IoC) container that
manages the creation, configuration, and lifecycle of application objects (beans). It does not
replace the JVM, render front-end views, or eliminate the need for databases.
Question 2: What is the primary advantage of using Spring Boot over the traditional Spring
Framework?
A) It eliminates the need for Java
B) It provides auto-configuration and embedded servers to simplify setup
C) It only supports NoSQL databases
D) It removes the need for dependency injection
Correct Answer: B) It provides auto-configuration and embedded servers to simplify
setup
Spring Boot reduces boilerplate configuration by providing auto-configuration, starter
dependencies, and embedded servers (e.g., Tomcat). It does not replace Java, dependency
injection, or limit database choices.
Question 3: Which annotation is used to mark a class as a Spring Boot application entry
point?
A) @SpringBootApplication
B) @Configuration
C) @ComponentScan
D) @EnableAutoConfiguration
Correct Answer: A) @SpringBootApplication
, WGU D288 | 3
@SpringBootApplication is a convenience annotation that combines @Configuration,
@EnableAutoConfiguration, and @ComponentScan. It is placed on the main class to enable
Spring Boot's auto-configuration and component scanning.
Question 4: What does the @RestController annotation indicate in a Spring Boot application?
A) That the class is a RESTful web service controller
B) That the class is a database entity
C) That the class is a repository interface
D) That the class is a configuration class
Correct Answer: A) That the class is a RESTful web service controller
@RestController combines @Controller and @ResponseBody, indicating that the class
handles REST requests and returns data directly as JSON or XML. It is used for RESTful web
service endpoints.
Question 5: Which of the following is a core principle of the Spring Framework?
A) Inversion of Control (IoC)
B) Hard-coded dependencies
C) Monolithic architecture
D) Manual object instantiation
Correct Answer: A) Inversion of Control (IoC)
Inversion of Control is a core principle where the framework controls the flow of the program
and the creation of objects, rather than the application code. This is achieved through
dependency injection.
Question 6: What is the role of the Spring Initializr?
A) To generate a Spring Boot project structure with selected dependencies
B) To compile Java code
C) To deploy applications to production
D) To manage database migrations
Correct Answer: A) To generate a Spring Boot project structure with selected
dependencies
, WGU D288 | 4
Spring Initializr is a web-based tool that generates a Spring Boot project skeleton with the
chosen build system (Maven/Gradle), Java version, and dependencies (e.g., Spring Web,
Spring Data JPA, MySQL Driver, Lombok).
Question 7: Which dependency is required to enable Spring Data JPA in a Spring Boot
project?
A) spring-boot-starter-data-jpa
B) spring-boot-starter-web
C) spring-boot-starter-security
D) spring-boot-starter-test
Correct Answer: A) spring-boot-starter-data-jpa
The spring-boot-starter-data-jpa dependency includes Spring Data JPA, Hibernate, and the
necessary configuration for JPA-based data access. Spring Web is for web applications,
Security for authentication, and Test for testing.
Question 8: What is the purpose of the Lombok library in a Spring Boot project?
A) To reduce boilerplate code by generating getters, setters, constructors, and other methods
B) To provide a web server
C) To manage database connections
D) To handle authentication
Correct Answer: A) To reduce boilerplate code by generating getters, setters,
constructors, and other methods
Lombok is a Java library that uses annotations (e.g., @Data, @Getter, @Setter) to
automatically generate common methods at compile time, reducing boilerplate code in entity
and service classes.
Question 9: Which dependency is required to use MySQL as the database in a Spring Boot
application?
A) mysql-connector-java
B) postgresql
C) h2
D) mongodb-driver
