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Free EX188 sample questions

Real questions from the Red Hat Certified Specialist in Containers practice bank, with the correct answer and an explanation for each one. No junk, no filler.

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Showing 6 of 12 free sample questions.

Question 1Choose one

You are a Cloud Architect designing a containerized application build process for a financial institution. You need to create a `Containerfile` that compiles a Go application from source and then packages the binary into a minimal runtime image to reduce the attack surface and image size. The build requires several dependencies that are not needed in production. Which strategy should you implement to satisfy these requirements?

Question 2Choose one

A DevOps engineer is optimizing a Containerfile for a Python application. The application source code changes frequently, but the dependencies (requirements.txt) change rarely. The current Containerfile rebuilds all dependencies every time the code changes. How should the engineer restructure the Containerfile to maximize build cache efficiency? flowchart TD Start([Start Build]) --> Layer1[Base Image] Layer1 --> Layer2[Install Sys Deps] Layer2 --> Layer3[?] Layer3 --> Layer4[?] Layer4 --> Layer5[CMD Run App]

Question 3Choose one

You are writing a Containerfile for a web server that must not run as the root user for security compliance. You have created a user named `webuser` with ID 1001. Which instruction sequence correctly configures the container to run as this user?

Question 4Choose one

A security audit requires that a specific directory `/opt/app/data` in your container image be pre-populated with data from a tarball named `assets.tar.gz`. The archive is located in the build context. You want the archive to be automatically extracted into the destination directory inside the image. Which Containerfile instruction should you use?

Question 5Choose one

You are creating a custom database container that needs to initialize a data directory at runtime. You want to ensure that if the user mounts a host directory to `/var/lib/db`, the appropriate SELinux context is applied so the container can write to it. Which Containerfile instruction defines this mount point to inform container runtimes of its purpose?

Question 6Choose one

A developer is building a container that needs to accept a configuration value at build time to select a specific software version, but this value should NOT persist as an environment variable in the final running container. Which instruction should be used?

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