Spring Boot Actuator MCQ - Multiple Choice Questions and Answers

Spring Boot Actuator is a powerful set of production-ready features that assist developers in monitoring and managing their applications. Here, we present a set of MCQ questions to test your knowledge of Spring Boot Actuator. Note that each question is followed by the correct answer and an explanation to help reinforce your knowledge.

1. Which Spring Boot starter dependency is required to enable Actuator features?

a) spring-boot-starter-web

b) spring-boot-starter-actuator

c) spring-boot-starter-monitor

d) spring-boot-starter-info

Answer:

b) spring-boot-starter-actuator

Explanation:

The spring-boot-starter-actuator dependency adds all the required libraries to enable Actuator's functionalities.

2. Which Actuator endpoint provides metrics related to memory, garbage collection, and threads?

a) /info

b) /health

c) /metrics

d) /env

Answer:

c) /metrics

Explanation:

The /metrics endpoint provides details about various application metrics including memory, GC, and threads.

3. Which Actuator endpoint displays application environment properties?

a) /details

b) /config

c) /env

d) /properties

Answer:

c) /env

Explanation:

The /env endpoint provides details about the application's environment properties.

4. By default, which Actuator endpoints are available over the web?

a) All of them

b) None of them

c) Only /info and /health

d) Only /metrics

Answer:

c) Only /info and /health

Explanation:

For security reasons, only the /info and /health endpoints are exposed over the web by default.

5. How can you include all Actuator endpoints to be exposed over the web?

a) management.endpoints.web.exposure.include=*

b) management.endpoints.web.exposed=*

c) management.endpoints.web.all=true

d) management.endpoints.web.include.all=true

Answer:

a) management.endpoints.web.exposure.include=*

Explanation:

The property management.endpoints.web.exposure.include=* allows all endpoints to be exposed over the web.

6. Which endpoint helps in accessing the current state of the application's loggers?

a) /logs

b) /loggers

c) /logging

d) /trace

Answer:

b) /loggers

Explanation:

The /loggers endpoint provides access to the application's loggers and allows modifications to their configurations.

7. What does the /health endpoint indicate if the application context failed to start?

a) UP

b) DOWN

c) OUT_OF_SERVICE

d) UNKNOWN

Answer:

b) DOWN

Explanation:

The /health endpoint would return a status of DOWN if the application context failed to start.

8. To change the default path prefix of actuator endpoints from /actuator, which property would you set?

a) management.endpoint.path

b) management.endpoints.prefix

c) management.endpoints.web.base-path

d) management.endpoint.base-path

Answer:

c) management.endpoints.web.base-path

Explanation:

The management.endpoints.web.base-path property can be used to set a different path prefix.

9. Which endpoint provides a history of recent HTTP requests?

a) /trace

b) /history

c) /requests

d) /http-trace

Answer:

d) /http-trace

Explanation:

The /http-trace endpoint provides a trace of recent HTTP requests.

10. How can you secure Actuator endpoints?

a) Using Basic Authentication

b) Using OAuth

c) Using JWT

d) All of the above

Answer:

d) All of the above

Explanation:

Actuator endpoints can be secured using various methods like Basic Authentication, OAuth, JWT, and more.

11. Which Actuator endpoint provides details about the application’s build version, description, and custom metadata?

a) /details

b) /info

c) /meta

d) /version

Answer:

b) /info

Explanation:

The /info endpoint provides details about application metadata including build version, description, and custom attributes.

12. Which of the following is NOT an out-of-the-box status provided by the /health endpoint?

a) UP

b) DOWN

c) HALTED

d) OUT_OF_SERVICE

Answer:

c) HALTED

Explanation:

HALTED is not an out-of-the-box status provided by the /health endpoint. The others, such as UP, DOWN, and OUT_OF_SERVICE, are default statuses.

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