Diagnose a CI/CD Pipeline Failure (such as Missing Dependency, Incompatible Versions of Components, and Failed Tests) 350-901 Practice Questions (Page 2)

Questions 6–10

1. 6application · medium

   A CI/CD pipeline for a PHP application fails during the build stage. The log shows: 'PHP Fatal error: Class 'PDO' not found'. The application uses a MySQL database. The build runs in a Docker container based on php:7.4-cli. What is the most likely cause of this failure?

   • AThe MySQL database is not reachable from the container.
   • BThe application code has a syntax error.
   • CThe PHP PDO extension is not installed in the Docker image.
   • DThe PHP version is incompatible with the application.
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2. 7foundation · easy

   A CI/CD pipeline fails during the test stage. The developer wants to see the details of the failed test, including the expected and actual values. Which artifact should the developer examine?

   • AThe source code.
   • BThe test report.
   • CThe build artifact.
   • DThe deployment log.
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4. 8foundation · easy

   A CI/CD pipeline fails during the test stage. The test report shows that a unit test for a function 'calculate_total' failed. What is the most appropriate first step to diagnose the root cause?

   • AReview the test report to see the expected and actual values from the failed assertion.
   • BRerun the pipeline without any changes to see if the failure is intermittent.
   • CDelete the failing test to make the pipeline pass.
   • DCheck the build logs to see if the compilation succeeded.
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5. 9foundation · easy

   A developer is debugging a CI/CD pipeline failure. The pipeline fails during the test stage, and the test report shows that a test failed. Which debugging technique is most appropriate to isolate the root cause?

   • ARun the failing test locally with the same environment configuration.
   • BRerun the entire pipeline to see if the failure is consistent.
   • CDelete the failing test to make the pipeline pass.
   • DIncrease the timeout for the test stage.
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6. 10foundation · easy

   A CI/CD pipeline fails during the build stage with an error indicating that a library 'foo' version 2.0 is required, but version 1.5 is installed. What is the most likely cause of this failure?

   • AThe library 'foo' is not compatible with the operating system of the build environment.
   • BThe project's dependency manifest specifies an incompatible version of the library.
   • CThe library 'foo' is not available in the package repository.
   • DThe build environment has a network issue preventing the download of the library.
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