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| Section | Objectives |
|---|---|
| Virtualization Concepts and Implementation | - Hypervisors and architectures
|
| Storage, Networking, and Security | - Storage for virtual environments
|
| Container Orchestration | - Kubernetes fundamentals
|
| Container Virtualization | - Container lifecycle management
|
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NEW QUESTION # 107
In order to determine if a virtualization host offers Intel VT-x support, which CPU flag must be searched for in the file /proc/cpuinfo?
Answer:
Explanation:
vmx
Explanation:
Intel VT-x is Intel's hardware-assisted virtualization technology and is required to run hypervisors such as KVMefficiently. According to Linux and KVM documentation, support for Intel VT-x can be verified by checking the CPU flags listed in the /proc/cpuinfo file.
The specific flag that indicates Intel VT-x support isvmx. This flag appears in the flags section for each processor core if VT-x is available and enabled in the system firmware (BIOS or UEFI). The presence of vmx confirms that the CPU supports hardware virtualization extensions required by KVM.
If the flag is absent, virtualization may either be unsupported by the CPU or disabled in the firmware settings.
For AMD processors, a different flag (svm) is used.
Virtualization documentation consistently references the vmx flag as the authoritative indicator for Intel VT-x support. Therefore, the correct and documented answer isvmx.
NEW QUESTION # 108
What is the primary benefit of using Packer for creating machine images?
Answer: D
Explanation:
Packer is an image automation tool whose primary benefit is ensuring consistency across environments.
According to virtualization and DevOps documentation, Packer allows administrators to create identical machine images for development, testing, and production from a single configuration.
By using the same base image and build process, Packer eliminates configuration drift and ensures that environments behave consistently. This significantly reduces deployment issues caused by environmental differences and supports Infrastructure as Code best practices.
Packer does not monitor virtual machines or directly speed up application development. While it can indirectly simplify deployments, its main advantage is image consistency and repeatability.
Therefore, the correct answer is B.
NEW QUESTION # 109
What is the purpose of a .dockerignore file?
Answer: B
Explanation:
Explanation
The purpose of a .dockerignore file is to specify files that Docker does not submit to the Docker daemon when building a Docker image. A .dockerignore file is a text file that contains a list of files or directories that should be excluded from the build context, which is the set of files and folders that are available for use in a Dockerfile. By using a .dockerignore file, you can avoid sending files or directories that are large, contain sensitive information, or are irrelevant to the Docker image to the daemon, which can improve the efficiency and security of the build process. The other options are incorrect because they do not describe the function of a
.dockerignore file. Option A is wrong because a .dockerignore file does not affect the files existing in a Docker image, but only the files sent to the daemon during the build. Option C is wrong because a .dockerignore file does not exist in the root file system of containers, but in the same directory as the Dockerfile. Option D is wrong because a .dockerignore file does not affect the volumes that Docker attaches to a container, but only the files included in the build context. Option E is wrong because a .dockerignore file does not affect the parts of a Dockerfile that are executed, but only the files available for use in a Dockerfile. References:
* What are .dockerignore files, and why you should use them?
* Dockerfile reference | Docker Docs
* How to use .dockerignore and its importance - Shisho Cloud
NEW QUESTION # 110
Which of the following mechanisms are used by LXC and Docker to create containers? (Choose three.)
Answer: A,C,D
NEW QUESTION # 111
Ifdocker stackis to be used to run a Docker Compose file on a Docker Swarm, how are the images referenced in the Docker Compose configuration made available on the Swarm nodes?
Answer: D
NEW QUESTION # 112
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