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NEW QUESTION # 36
Which two Linux commands would you use to show the amount of RAM in your system? (Choose two.)
- A. df -h
- B. free -h
- C. cat /proc/cpuinfo
- D. cat /proc/meminto
Answer: B,D
Explanation:
he free -h command in Linux displays the total amount of free and used physical and swap memory in the system, as well as the buffers used by the kernel. The cat /proc/meminfo command displays real-time information about the system's memory usage as well as the buffers and shared memory used by the kernel.
NEW QUESTION # 37
You have started a container in Docker, made configuration changes to it, and stopped the container. You notice the next time that you execute the docker run command, the changes have not persisted.
What is the problem?
- A. The docker load command must be used to persist the change.
- B. The docker run command starts a new copy of the container, not the existing version.
- C. The docker exec command needs to be run first to save and exit the running container.
- D. Docker images need to be recompiled to make any changes.
Answer: B
Explanation:
Docker containers are designed to be ephemeral, meaning they run based on their current configuration. When a Docker container is stopped, it does not automatically save changes made during its runtime. When you execute docker run, it starts a new instance of the container, not an existing version with its changes. If you want to persist changes between runs, you need to commit changes to a new Docker image or use Docker volumes for data persistence.
NEW QUESTION # 38
Which two statements are true regarding isolated namespaces in Juniper Cloud-Native Contrail Networking (CN2)? (Choose two.)
- A. Pods in isolated namespaces can reach services in non-isolated namespaces.
- B. Pods in isolated namespaces can only reach services in the same namespace.
- C. Pods in isolated namespaces can communicate with pods in non-isolated namespaces.
- D. Pods in isolated namespaces can only communicate with pods in the same namespace.
Answer: B,D
Explanation:
In Juniper Cloud-Native Contrail Networking (CN2), isolated namespaces are used to isolate a pod from other pods without explicitly configuring a network policy. Pods in an isolated namespace can only communicate with pods in the same namespace. They cannot reach pods or services in other isolated or non-isolated namespaces.
NEW QUESTION # 39
You are deploying CN2 using Kubernetes as your orchestrator.
In this scenario, which component contains the vRouter agent?
- A. kube-manager
- B. Contrail controller
- C. Ikube-scheduler
- D. worker node
Answer: D
Explanation:
In a CN2 deployment using Kubernetes as the orchestrator, the vRouter agent is contained in the worker node. The vRouter agent is responsible for managing the forwarding plane on each node in a Contrail cluster. It interacts with the kernel to manage the services and interfaces within the virtual networks.
NEW QUESTION # 40
What are two available installation methods for an OpenShift cluster? (Choose two.)
- A. kubeadm
- B. installer-provisioned infrastructure
- C. kubesprav
- D. user-provisioned infrastructure
Answer: B,D
Explanation:
There are two available installation methods for an OpenShift cluster. One is the installer- provisioned infrastructure method, and the other is the user-provisioned infrastructure method.
NEW QUESTION # 41
Which component of a software-defined networking (SDN) controller defines where data packets are forwarded by a network device?
- A. the control plane
- B. the management plane
- C. the operational plane
- D. the forwarding plane
Answer: D
Explanation:
The forwarding plane (also known as the data plane) of a software-defined networking (SDN) controller is responsible for forwarding data packets based on the instructions given by the control plane. It handles all activities involving data packets sent by the end-user, including forwarding of packets.
NEW QUESTION # 42
Which OpenStack service provides API client authentication?
- A. Neutron
- B. iHeat
- C. Keystone
- D. Nova
Answer: C
Explanation:
Keystone is an OpenStack service that provides API client authentication. It provides API client authentication, service discovery, and distributed multi-tenant authorization by implementing OpenStack's Identity API.
NEW QUESTION # 43
Which statement is correct about overlay or underlay networks or fabrics?
- A. Underlay fabrics enable multitenancy through virtualization.
- B. Underlay fabrics decouple network services from the overlay infrastructure.
- C. Overlay networks are virtual networks.
- D. Overlay networks are Layer 3 networks that must use OSPF for routing purposes.
Answer: C
Explanation:
Overlay networks are indeed virtual networks. They are logical constructs that stitch together disparate, dispersed network infrastructure, often referred to as underlay. Underlay networks refer to the physical network infrastructure, while overlay networks implement network virtualization concepts.
NEW QUESTION # 44
Your e-commerce application is deployed on a public cloud. As compared to the rest of the year, it receives substantial traffic during the Christmas season.
In this scenario, which cloud computing feature automatically increases or decreases the resources based on the demand?
- A. broad network access
- B. on-demand self-service
- C. rapid elasticity
- D. resource pooling
Answer: C
Explanation:
The cloud computing feature that automatically increases or decreases the resources based on the demand is known as rapid elasticity. In cloud computing, scaling is the process of adding or removing compute, storage, and network services to meet the demands a workload makes for resources in order to maintain availability and performance as utilization increases.
NEW QUESTION # 45
What are two characteristics of the OpenShift Assisted Installer? (Choose two.)
- A. It provides full feature support and customizations.
- B. It uses one of the control plane nodes as a bootstrap node.
- C. It does not support bare-metal deployments.
- D. It offers REST APIs for the configuration and installation
Answer: B,D
Explanation:
The OpenShift Assisted Installer uses one of the control plane nodes as a bootstrap node. It also offers REST APIs for the configuration and installation.
NEW QUESTION # 46
Which virtualization method requires less duplication of hardware resources?
- A. OS-level virtualization
- B. hardware-assisted virtualization
- C. full virtualization
- D. paravirtualization
Answer: A
Explanation:
OS-level virtualization requires less duplication of hardware resources. This method allows multiple instances of an operating system or multiple different operating systems to run on a single physical server, sharing the same hardware resources. This results in more efficient use of hardware resources compared to other virtualization methods such as full virtualization or paravirtualization.
NEW QUESTION # 47
Which two statements are true about virtual networks? (Choose two.)
- A. Virtual networks are able to span multiple devices.
- B. Virtual networks are available on common Linux distributions.
- C. Virtual networks are limited to a single device.
- D. Virtual networks are available only as part of a cloud orchestration system.
Answer: A,B
Explanation:
Virtual networks are logical networks that are decoupled from the underlying network hardware.
This decoupling allows network administrators to manage their networks independently of the physical network topology. As such, virtual networks can span multiple devices, allowing for a high degree of flexibility and scalability. Furthermore, virtual networks are available on common Linux distributions, allowing for easy deployment and management.
NEW QUESTION # 48
You are deploying CN2 using Kubernetes as your orchestrator.
In this scenario, which component contains the vRouter agent?
- A. kube-manager
- B. Contrail controller
- C. Ikube-scheduler
- D. worker node
Answer: D
Explanation:
In a CN2 deployment using Kubernetes as the orchestrator, the vRouter agent is contained in the worker node. The vRouter agent is responsible for managing the forwarding plane on each node in a Contrail cluster. It interacts with the kernel to manage the services and interfaces within the virtual networks.
NEW QUESTION # 49
What is an OpenShift route?
- A. It allows pods to communicate across namespaces.
- B. It provisions external access to a service.
- C. It provisions endpoints for a service.
- D. It allows pods to communicate across clusters.
Answer: B
Explanation:
An OpenShift route is a way to provision external access to a service. A route exposes a service at a host name, such as www.example.com, that external clients can use to access the service. A route can also specify security options, such as TLS termination, and load balancing options, such as round robin or least connection.
NEW QUESTION # 50
Which statement is true about containers?
- A. Containers perform abstraction at the application layer.
- B. Containers perform abstraction at the physical layer.
- C. Containers share a copy of the host's operating system binaries.
- D. Containers are slower to boot than virtual machines.
Answer: A
Explanation:
Containers perform abstraction at the application layer. They are executable units of software in which application code is packaged along with its libraries and dependencies, in common ways so that the code can be run anywhere--whether it be on desktop, traditional IT or the cloud.
NEW QUESTION # 51
What is the function that enables CN2 to manage its resources and interact with the kube-api?
- A. the data plane
- B. the configuration plane
- C. the control plane
- D. the management plane
Answer: B
Explanation:
The configuration plane is the function that enables CN2 to manage its resources and interact with the kube-api. The configuration plane is responsible for storing and managing all configuration data in a Contrail cluster. It provides APIs for other components to retrieve this data.
This allows CN2 to manage its resources and interact with the kube-api.
NEW QUESTION # 52
What are the two characteristics of the Network Functions Virtualization (NFV) framework?
(Choose two.)
- A. It implements virtualized tunnel endpoints.
- B. It decouples the network control plane from the forwarding plane.
- C. It decouples the network software from the hardware.
- D. It implements virtualized network functions
Answer: C,D
Explanation:
The two characteristics of the Network Functions Virtualization (NFV) framework are that it implements virtualized network functions (VNFs) and that it decouples the network software from the hardware. According to the NFV overview by VMware, NFV is "designed to deliver the network services needed to support an infrastructure totally independent from hardware by decoupling network functions from proprietary purpose-built hardware appliances" and that "the software that provides these network services are known as virtual network functions (VNFs) and run on generic hardware". Other characteristics that are mentioned in the question are related to Software Defined Networking (SDN), not NFV. SDN separates the network control plane from the forwarding plane and implements virtualized tunnel endpoints.
NEW QUESTION # 53
Which container runtime engine is used by default in OpenShift?
- A. cri-o
- B. runC
- C. containerd
- D. Docker
Answer: A
Explanation:
The default container runtime engine used by OpenShift is cri-o. CRI-O is an open source, community-driven container engine. Its primary goal is to replace the Docker service as the container engine for Kubernetes implementations, such as OpenShift Container Platform.
NEW QUESTION # 54
In the CN2 architecture, which component integrates with the orchestrator to listen for changes and take action on any events affecting network resources?
- A. contrail-vrouter-agent
- B. kube-a pi server
- C. contrail-k8s-kubemanaqer
- D. cni.bin
Answer: C
Explanation:
contrail-k8s-kubemanager is the component in the CN2 architecture that integrates with the orchestrator (such as Kubernetes or OpenShift) to listen for changes and take action on any events affecting network resources. According to the CN2 components documentation2, contrail- k8s- kubemanager is "the interface between Kubernetes resources and Contrail resources" that
"watches the kube-apiserver for changes to regular Kubernetes resources such as service and namespace and acts on any changes that affect the networking resources". Other components in the CN2 architecture are contrail-k8s-apiserver2, which is an aggregated API server that manages all Contrail resources; cni.bin, which is a binary file that implements the Container Network Interface (CNI) specification for CN2; and contrail-vrouter-agent, which is a pod that runs on every node and communicates with the CN2 control plane to program the data plane.
NEW QUESTION # 55
Which two statements are correct about OpenShift monitoring? (Choose two.)
- A. OpenShifhas its own monitoring framework.
- B. OpenShifis not able to configure customized alerts.
- C. OpenShifmonitoring is not compatible with Grafana.
- D. OpenShifis able to configure customized alerts.
Answer: A,D
Explanation:
OpenShift includes a preconfigured, preinstalled, and self-updating monitoring stack that provides monitoring for core platform components. You also have the option to enable monitoring for user- defined projects. This means OpenShift has its own monitoring framework (B) and is able to configure customized alerts (D).
NEW QUESTION # 56
What is the name of the Docker container runtime?
- A. containerd
- B. dockerd
- C. cri-o
- D. docker cl
Answer: A
Explanation:
The name of the Docker container runtime is containerd, which is a daemon that manages the complete container lifecycle of its host system, from image transfer and storage to container execution and supervision to low-level storage to network attachments and beyond. Dockerd is the Docker daemon that acts as the primary user interface for Docker. Docker cl is not a valid name for any Docker component. Cri-o is another container runtime that implements the Kubernetes Container Runtime Interface (CRI) to enable using OCI (Open Container Initiative) compatible runtimes.
NEW QUESTION # 57
Click the Exhibit button.
Referring to the exhibit, which two statements are correct? (Choose two.)
- A. The myvSRX instance is part of a default network.
- B. The c using a custom flavor.
- C. The myvSRX instance is currently running.
- D. The myvSRX instance is using a default image.
Answer: B,C
Explanation:
Based on the image description provided, the instance named 'myvSRX' appears to be using a custom flavor (not default) and is currently in an 'ACTIVE' state, which means it is running.
NEW QUESTION # 58
Which two statements are correct about OpenStack networks? (Choose two.)
- A. It is not possible to add host routes in the DHCP settings in an OpenStack network.
- B. It is possible to enable DHCP for a subnet in an OpenStack network.
- C. It is possible to share networks with other projects in an OpenStack network.
- D. It is not possible to specify a subnet address in an OpenStack network.
Answer: B,C
Explanation:
In OpenStack networks, it is possible to share networks with other projects. Also, it is possible to enable DHCP for a subnet in an OpenStack network.
NEW QUESTION # 59
You must provide tunneling in the overlay that supports multipath capabilities.
Which two protocols provide this function? (Choose two.)
- A. VXLAN
- B. VPN
- C. MPLSoGRE
- D. MPLSoUDP
Answer: A,D
Explanation:
MPLSoUDP (Multiprotocol Label Switching over User Datagram Protocol) and VXLAN (Virtual Extensible LAN) are two protocols that provide tunneling in the overlay and support multipath capabilities. MPLSoUDP is an encapsulation protocol that allows MPLS packets to be encapsulated in UDP packets. VXLAN is a network virtualization technology that attempts to address the scalability problems associated with large cloud computing deployments.
NEW QUESTION # 60
You want to limit the memory, CPU, and network utilization of a set of processes running on a Linux host.
Which Linux feature would you configure in this scenario?
- A. virtual routing and forwarding instances
- B. control groups
- C. slicing
- D. network namespaces
Answer: B
Explanation:
Control groups (cgroups) is a Linux kernel feature that limits, accounts for, and isolates the CPU, memory, disk I/O, and network usage of one or more processes. It allows you to allocate resources among user-defined groups of processes running on a system. You can monitor the groups of processes, deny the groups of processes access to certain resources, or even freeze groups of processes.
NEW QUESTION # 61
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