EX378 Online Dumps Boost Your Career

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June 3, 2025

The EX378 Red Hat Certified Cloud-native Developer exam certification exam is challenging, and it's natural to feel anxious and nervous before taking the exam. Practicing with EX378 dumps questions can help alleviate this anxiety by boosting your confidence. As you practice and become more familiar with the exam format and content, you'll feel more confident in your abilities, which can help you perform better on the actual EX378 exam. Practicing with EX378 questions can increase your chances of success in the certification exam. Practice free RedHat EX378 exam dumps below.

Page 1 of 11

1. Use @Bulkhead with an asynchronous method.

See the Explanation.

2. Use @IfBuildProfile annotation to create a bean only in a specific profile.

See the Explanation.

3. How do you add events to a span for additional observability?

See the Explanation.

4. Create a reactive endpoint returning a Uni.

See the Explanation.

5. How do you manually inject context into outbound requests using OpenTelemetry APIs?

See the Explanation.

6. Override MicroProfile default config source ordinal in microprofile-config.properties.

See the Explanation.

7. How do you set parent context manually when starting a new span?

See the Explanation.

8. How do you acknowledge messages explicitly in a method that consumes Message?

See the Explanation.

9. Create a histogram for execution durations.

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10. How do you declare a channel that should be automatically acknowledged before method execution?

See the Explanation.

Page 2 of 11

11. Create reusable config profile for staging environment.

See the Explanation.

12. How do you conditionally trace only certain endpoints in Quarkus?

See the Explanation.

13. List all supported Micrometer registries in Quarkus.

See the Explanation.

14. How do you ensure context is passed from one service to another in a trace?

See the Explanation.

15. Use fallback together with retry.

See the Explanation.

16. How do you persist a new entity using the Active Record pattern in a Quarkus Panache application?

See the Explanation.

17. How do you view trace ID in Quarkus logs for a request?

See the Explanation.

18. Export metrics to a Graphite agent.

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19. Enable Health UI explicitly if not available.

See the Explanation.

20. Access and print all configuration properties from all ConfigSources.

See the Explanation.

Page 3 of 11

21. Use a config profile to set different timeouts for environments.

See the Explanation.

22. How do you define and use a derived query method in Panache repository?

See the Explanation.

23. How do you inject REST client configurations for reuse across environments (dev, prod)?

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24. Inject a property into a JAX-RS resource class.

See the Explanation.

25. How do you override default headers for a specific REST method in the client interface?

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26. Style HealthCheck response with documentation-like messages.

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27. Access fault tolerance config via MicroProfile Config programmatically.

See the Explanation.

28. Apply bean validation with @Valid and @NotNull.

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29. What is a span in OpenTelemetry, and how does it relate to a trace?

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30. Create an HTTP DELETE method to remove a resource.

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Page 4 of 11

31. Group application-specific metrics with naming convention.

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32. What is the purpose of using Message as a parameter instead of plain T in a reactive messaging method?

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33. Simulate heavy load to observe bulkhead behavior.

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34. Accept multiple media types in a resource.

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35. How do you emit messages to a channel using @Outgoing?

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36. Apply fallback with CircuitBreaker.

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37. Declare content type for request and response.

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38. Create a config mapping interface using MicroProfile Config 2.0+.

See the Explanation.

39. How do you specify a global API title, description, and version in OpenAPI?

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40. How do you invoke a remote service using POST with the REST Client Reactive?

See the Explanation.

Page 5 of 11

41. Configure FT globally for a specific bean using FQN.

See the Explanation.

42. How do you configure REST clients with multiple base URIs using interfaces?

See the Explanation.

43. How do you define a default error response schema across all endpoints?

See the Explanation.

44. Apply @Bulkhead to a JAX-RS endpoint to throttle API usage.

See the Explanation.

45. Use a configuration property to control bean behavior via conditional logic.

See the Explanation.

46. Return a 204 No Content for empty results.

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47. How do you use @Outgoing with Emitter to emit messages based on a business rule?

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48. Ensure Quarkus includes health extensions.

See the Explanation.

49. Demonstrate the default ordering of config sources.

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50. Validate configuration value range and fail-fast on invalid input.

See the Explanation.

Page 6 of 11

51. Create a health check that only runs once at startup.

See the Explanation.

52. Simulate a failure in readiness based on time window.

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53. How do you define a custom query method in the Author entity using Panache Active Record?

See the Explanation.

54. Group fault tolerance settings by prefix for manageability.

See the Explanation.

55. Use @Timed annotation to instrument method duration.

See the Explanation.

56. How do you retrieve all books written by a specific author using Panache?

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57. How do you log messages as they pass through a reactive processor method?

See the Explanation.

58. Create a custom error response using a POJO.

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59. Limit access to the /q/metrics endpoint.

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60. How do you annotate a JAX-RS method to include OpenAPI metadata?

See the Explanation.

Page 7 of 11

61. Create a ConfigSourceProvider that registers multiple sources.

See the Explanation.

62. Measure asynchronous job time using Timer.Sample.

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63. Inject optional configuration property and provide runtime fallback.

See the Explanation.

64. Configure a secured endpoint using JWT bearer token.

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65. Create a reusable config value class and inject it into multiple beans.

See the Explanation.

66. How do you include external documentation links in OpenAPI?

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67. How do you trace asynchronous tasks in Quarkus while maintaining context?

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68. How do you write a test for a custom Panache method in a Quarkus test class?

See the Explanation.

69. Create a custom ConfigSource that reads from an in-memory map.

See the Explanation.

70. How do you delete an Author and automatically remove all related Book records?

See the Explanation.

Page 8 of 11

71. How do you retrieve a count of all books using Panache?

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72. Access MP-JWT in a CDI bean (non-JAX-RS).

See the Explanation.

73. How do you correlate front-end requests (e.g., Angular/React) with backend traces?

See the Explanation.

74. Combine @Asynchronous and @Timeout for non-blocking protection.

See the Explanation.

75. How do you add versioning metadata to your OpenAPI spec (e.g., semver)?

See the Explanation.

76. Add a second health check to the database group.

See the Explanation.

77. Configure bulkhead values using MicroProfile Config.

See the Explanation.

78. Use a nested bean to group related configuration properties.

See the Explanation.

79. Track memory usage using a gauge and lambda.

See the Explanation.

80. How do you propagate trace context across microservices using the REST Client Reactive?

See the Explanation.

Page 9 of 11

81. How do you sort results with Panache’s query API?

See the Explanation.

82. 1. Create a configuration property for the application name and inject it into a CDI bean.

See the Explanation.

83. Customize token validation logic with a filter.

See the Explanation.

84. Use a Java record as a JSON DTO.

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85. How do you structure a trace to include parent-child and sibling spans?

See the Explanation.

86. Inject a configuration property into a constructor using MicroProfile Config.

See the Explanation.

87. Implement a liveness check that fails after 3 failed pings.

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88. Programmatically access all health group statuses.

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89. Use MicroProfile Config to externalize retry settings.

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90. Expose a health check for a database connection.

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Page 10 of 11

91. Expose a dynamic gauge with an object supplier.

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92. How do you insert data into related entities (Author and Book) with the relationship setup?

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93. META-INF/microprofile-config.properties C ordinal 100

You can test which value is picked when you set a key in multiple sources.

3 1. Manually specify the priority of a config source in a custom implementation.

See the Explanation.

94. Return a streaming response.

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95. Log CircuitBreaker transitions with a wrapper method.

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96. Use constructor injection in a REST resource.

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97. How do you perform a DELETE request using the REST Client interface?

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98. Create a custom principal name from a JWT claim.

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99. Use MicroProfile Config to customize CircuitBreaker.

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100. How do you define an interface that performs path parameter substitution for a dynamic path?

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Page 11 of 11

101. How do you define a custom query in a Panache repository to return all books starting with a prefix?

See the Explanation.

102. Check CircuitBreakerOpenException in fallback.

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103. How do you use message metadata (e.g., Kafka headers) in a consumer method?

See the Explanation.

104. Inject JsonWebToken and extract standard claims.

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105. Support wildcard path parameters.

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106. Log when bulkhead rejects new calls.

See the Explanation.

107. Combine property values from multiple config sources.

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108. Access HTTP server request metrics.

See the Explanation.

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EX378 Online Dumps Boost Your Career

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