Exam AZ-400 topic 7 question 42 discussion

It should be C. a multi-stage Dockerfile "Build and test with a multi-stage Dockerfile: build and tests execute inside the container using a multi-stage Docker file, as such test results are not published back to the pipeline." https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/test/publish-test-results?view=azure-devops&tabs=trx%2Cyaml

For Docker based apps there are many ways to build your application and run tests: Build and test in a build pipeline: build and tests execute in the pipeline and test results are published using the Publish Test Results task. Build and test with a multi-stage Dockerfile: build and tests execute inside the container using a multi-stage Docker file, as such test results are not published back to the pipeline. Build, test, and publish results with a Dockerfile: build and tests execute inside the container and results are published back to the pipeline. See the example below. --> So multi-stage docker file. https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/test/publish-test-results?view=azure-devops&tabs=trx%2Cyaml

The link, still provides a good argumentation for selecting C https://learn.microsoft.com/en-us/azure/devops/pipelines/tasks/reference/publish-test-results-v2?view=azure-pipelines&viewFallbackFrom=azure-devops&tabs=trx%2Ctrxattachments%2Cyaml#docker

Inline Testing Requirements: The goal is to execute tests within the pipeline without impacting the final image or published test results. We want to isolate the testing environment from the build process. Separation of Concerns No Test Result Publication

Multi Stage Dockerfile. We can build and test in the pipeleine

To prevent the test results from being published to the pipeline, you can use the --exit-code-from option when running the docker-compose up command.

Build and test in a build pipeline: builds and tests execute in the pipeline and test results are published using the Publish Test Results task. Build and test with a multi-stage Dockerfile: builds and tests execute inside the container using a multi-stage Docker file, as such test results are not published back to the pipeline. Build, test, and publish results with a Dockerfile: builds and tests execute inside the container, and results are published back to the pipeline. See the example below. https://learn.microsoft.com/en-us/azure/devops/pipelines/tasks/reference/publish-test-results-v2?view=azure-pipelines&viewFallbackFrom=azure-devops&tabs=trx%2Ctrxattachments%2Cyaml#docker

this question appeared on today's (20/06/23) exam.selected D. scored 955. should be correct! cheers

C. a multi-stage Dockerfile

B and D are wrong for sure Between A and C, C is the answer Multi-stage builds are preferred

Build and test in a build pipeline v/s Build and test with a multi-stage Dockerfile: v/s Build, test, and publish results with a Dockerfile: So, Build and test with a multi-stage Dockerfile: satisfy this.

Multistage is right answer

Exam Question April 1st 2022, went with Multi-Stage.

IMHO the answer is C https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/test/publish-test-results?view=azure-devops&tabs=trx%2Cyaml#docker

Multistage is right answer "Build and test with a multi-stage Dockerfile: build and tests execute inside the container using a multi-stage Docker file, as such test results are not published back to the pipeline." https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/test/publish-test-results?view=azure-devops&tabs=trx%2Cyaml

IHOP, Answer is D, because the question mentions "Prevent the results from being published to the pipeline" if you need to publish results then it is multi-stage.

Build and test WITHOUT publishing ==> multi-stage