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| Section | Weight | Objectives |
|---|---|---|
| Container Orchestration | 22% | - Networking & Storage
|
| Cloud Native Observability | 8% | - Logging & Tracing
|
| Cloud Native Architecture | 16% | - Ecosystem & Landscape
|
| Cloud Native Application Delivery | 8% | - Delivery Models
|
| Kubernetes Fundamentals | 46% | - Containerization Basics
|
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NEW QUESTION # 269
Which option represents best practices when building container images?
Answer: A
Explanation:
Building secure, efficient, and reproducible container images is a core principle of cloud native application delivery. Kubernetes documentation and container security best practices emphasize minimizing image size, reducing attack surface, and ensuring deterministic builds. Option C fully aligns with these principles, making it the correct answer.
Multi-stage builds allow developers to separate the build environment from the runtime environment.
Dependencies such as compilers, build tools, and temporary artifacts are used only in intermediate stages and excluded from the final image. This significantly reduces image size and limits the presence of unnecessary tools that could be exploited at runtime.
Pinning the base image to a specific digest ensures immutability and reproducibility. Tags such as latest can change over time, potentially introducing breaking changes or vulnerabilities without notice. By using a digest, teams guarantee that the same base image is used every time the image is built, which is essential for predictable behavior, security auditing, and reliable rollbacks.
Installing only necessary packages further reduces the attack surface. Every additional package increases the risk of vulnerabilities and expands the maintenance burden. Minimal images are faster to pull, quicker to start, and easier to scan for vulnerabilities. Kubernetes security guidance consistently recommends keeping container images as small and purpose-built as possible.
Option A is incorrect because using the latest tag undermines build determinism and traceability. Option B is incorrect because installing extra packages "just in case" contradicts the principle of minimalism and increases security risk. Option D is incorrect because avoiding multi-stage builds and installing unnecessary packages leads to larger, less secure images and is explicitly discouraged in cloud native best practices.
According to Kubernetes and CNCF security guidance, combining multi-stage builds, immutable image references, and minimal dependencies results in more secure, reliable, and maintainable container images.
Therefore, option C represents the best and fully verified approach when building container images.
NEW QUESTION # 270
Services and Pods in Kubernetes are ______ objects.
Answer: C
NEW QUESTION # 271
What is a key advantage of using a DaemonSet in Kubernetes for deploying cluster-wide services such as logging or monitoring agents?
Answer: C
Explanation:
A DaemonSet ensures that a copy of the specified Pod runs on every eligible node. When new nodes join the cluster, Kubernetes automatically schedules the Pod on them, making DaemonSets well suited for node-level logging and monitoring agents.
NEW QUESTION # 272
What is a best practice to minimize the container image size?
Answer: C
Explanation:
A proven best practice for minimizing container image size is to use multi-stage builds, so B is correct.
Multi-stage builds allow you to separate the "build environment" from the "runtime environment." In the first stage, you can use a full-featured base image (with compilers, package managers, and build tools) to compile your application or assemble artifacts. In the final stage, you copy only the resulting binaries or necessary runtime assets into a much smaller base image (for example, a distroless image or a slim OS image). This dramatically reduces the final image size because it excludes compilers, caches, and build dependencies that are not needed at runtime.
In cloud-native application delivery, smaller images matter for several reasons. They pull faster, which speeds up deployments, rollouts, and scaling events (Pods become Ready sooner). They also reduce attack surface by removing unnecessary packages, which helps security posture and scanning results. Smaller images tend to be simpler and more reproducible, improving reliability across environments.
Option A is not a size-minimization practice: using a Dockerfile is simply the standard way to define how to build an image; it doesn't inherently reduce size. Option C (different tags) changes image identification but not size. Option D (a build script) may help automation, but it doesn't guarantee smaller images; the image contents are determined by what ends up in the layers.
Multi-stage builds are commonly paired with other best practices: choosing minimal base images, cleaning package caches, avoiding copying unnecessary files (use .dockerignore), and reducing layer churn. But among the options, the clearest and most directly correct technique is multi-stage builds.
Therefore, the verified answer is B.
=========
NEW QUESTION # 273
Which of the following is a definition of Hybrid Cloud?
Answer: A
NEW QUESTION # 274
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