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Exam CKS Topic 3 Question 53 Discussion

Actual exam question for Linux Foundation's CKS exam
Question #: 53
Topic #: 3
You are responsible for managing the software supply chain of a critical application deployed in a Kubernetes cluster. This application utilizes a library called 'lib-crypto' for secure cryptographic operations. How can you ensure that the version of 'lib-ctypto' deployed in your Kubernetes environment is the same as the one specified in the Software Bill of Materials (SBOM) for the application?

Suggested Answer:

Solution (Step by Step) :
1. Obtain the SBOM: Retrieve the SBOM for your application. This document will contain a list of all the components and their versions, including 'lib- crypto'. The SBOM can be generated using various tools like 'cyclonedx-boms or 'Sbom-cli'.
2. Parse the S80M: IJse a suitable tool or script to parse the SdOM and extract the version of 'lib-crypto' from the S80M_
3. Verify in the Deployment Manifest: Inspect the deployment manifest for your application. Look for the container definition that uses the 'lib-crypto' image. Ensure that the image tag used in the deployment manifest matches the version of 'Iib-crypto' extracted from the SBOM_
4. Implement Image Scanning: Integrate an image scanning tool like 'Clair' or 'Anchores into your CI/CD pipeline. This will scan the 'Iib-crypto' image before deployment to ensure it doesn't contain any vulnerabilities or unexpected components.
5. Use a Container Registry with SBOM Support: Consider using a container registry like JFrog Xray or Snyk Container which supports storing and verifying S80Ms for each image. This provides a centralized mechanism for tracking and validating the software components in your container images.

by Sibyl at Jun 30, 2026, 07:35 AM

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