Optimize Workflow Performance and Cost GH-200 Practice Questions (Page 3)

Questions 11–15

1. 11application · medium

   A workflow has a build job that compiles a C++ project. The team notices that the build step takes 10 minutes, and the workflow runs on every push. They want to reduce the time and cost. Which optimization is most effective?

   • AUse a larger runner with more CPU cores.
   • BIncrease the timeout-minutes for the build job.
   • CSplit the build into multiple jobs.
   • DCache the build output directory so that unchanged source files don't need to be recompiled.
   Reveal Solution Discussion Select an answer first
2. 12foundation · easy

   Which GitHub Actions feature is specifically designed to store and restore dependencies or build outputs across workflow runs to avoid re-downloading or recompiling them?

   • ASecrets
   • BArtifacts
   • CEnvironments
   • DCaching
   Reveal Solution Discussion Select an answer first
4. 13expert · hard

   A workflow builds a large monorepo with multiple independent packages. The build currently takes 25 minutes because all packages are built in a single job. The team wants to reduce the time to under 10 minutes, but they also need to ensure that the build outputs are available for later jobs. Which approach best meets both requirements?

   • AUse a single job with multiple steps, each building a package.
   • BUse a matrix job to build each package in parallel, then upload each package's output as an artifact.
   • CUse concurrency control to cancel redundant runs.
   • DUse a larger runner with more CPU cores.
   Reveal Solution Discussion Select an answer first
5. 14foundation · easy

   Which GitHub Actions feature allows you to run the same job multiple times with different configurations in parallel?

   • AArtifacts
   • BConcurrency control
   • CMatrix builds
   • DCaching
   Reveal Solution Discussion Select an answer first
6. 15application · medium

   A workflow builds a Node.js application. The build step runs `npm ci` which takes 4 minutes because it installs all dependencies from the registry. The team wants to speed up the build. What is the most effective change?

   • ARun the build on a larger runner with more memory.
   • BUse `npm install` instead of `npm ci`.
   • CAdd a caching step for the npm cache directory before running npm ci.
   • DSplit the build into multiple jobs.
   Reveal Solution Discussion Select an answer first