HCIA v.3.5 _ Compute_Cloud_Services

Question 1

Cloud Computing

Answer 1

A model for enabling ubiquitous, convenient, on-demand network access to a shared pool of configurable computing resources.

Question 2

EVS disk types

Answer 2

Common I/O, high I/O, ultra-high I/O, general purpose SSD, and extreme SSD

Question 3

To back up ECSs and EVS disks periodically or at a specified time you can

Answer 3

configure backup policies on the management console or use an API.

Question 4

yearly/monthly, pay-per-use, and spot price

Answer 4

Billing modes for ECS

Question 5

ECSs are deployed in multiple Availability Zones (AZs) connected with each other through an __________.

Answer 5

intranet

Question 6

You can use Cloud Eye to monitor ECS resource usage.

Answer 6

true

Question 7

The central processing unit (CPU) is mainly composed of three parts:

Answer 7

calculator, controller and register

Question 8

Complex instruction set computer (CISC) is used by and Reduced instruction set computer (RISC)

Answer 8

x86 based CPUS and Kunpeg

Question 9

_______has strong compatibility, a variety of instructions, variable length, and is implemented by microprogramming. _______, on the other hand, has few instructions and similar frequency, and is mainly implemented by hardware (general-purpose registers, hard-wired logic control).

Answer 9

CISC, RISC

Question 10

Regions are classified into

Answer 10

A universal region provides universal cloud services for common tenants. A dedicated region provides specific services for specific tenants.

Question 11

A ________can have multiple AZs, and an ____can belong to only one region.

Answer 11

region, AZ

Question 12

AZs in each region can communicate with each other

Answer 12

they can communicate with each other at the network layer.

Question 13

If an ECS is associated with an anti-affinity policy

Answer 13

ECSs added to the ECS group are deployed on different hosts for higher reliability.

Question 14

You can access ECSs
through the ___________________ or _______________.

Answer 14

Management console or HTTPS-based REST APIs. Use an API if you need to integrate the ECSs into a
third-party system for secondary development.

Question 15

When Selecting a login method and log in to the Windows ECS, which of the following methods does not have a binded EIP? -Through the management console (VNC)
- RDP file
- Using MSTSC
- mobile terminal
- From a Mac

Answer 15

Through the management console (VNC)

Question 15

To log in to Linux ECS using a password for the first time, you can log in as root:

Answer 15

• Through the management console (VNC).
  ▫ Using an SSH password, as long as the ECS has an EIP bound.
  ▫ From a mobile terminal, as long as the ECS has an EIP bound.

Question 16

True or false:
Only the original image of the ECS can be used to reinstall the OS.

Answer 16

True

Question 17

True or false:
Changing the OS won’t change the system disk of the ECS. After the change, there wont be a new system disk ID, and the original system
disk wont be gone.

Answer 17

False:
* Changing the OS will change the system disk of the ECS. After the change, there will be a new system disk ID, and the original system
disk will be gone.

Question 18

True or false:

Source/destination check is not used for existing NICs. It is only used for NICs created together with the ECS.

Answer 18

True

Question 19

An image is a server or disk template that contains

Answer 19

an operating system (OS), service data, and necessary application software, such as database software.

Question 20

Private images can be transferred between accounts, regions, or cloud platforms through

Answer 20

image sharing, replication, and export.

Question 21

True or false:
IMS allows you to batch deploy and upgrade application systems, improving O&M efficiency and ensuring consistency.

Answer 21

True

Question 22

A _______________contains an OS and pre-installed software for various services. You can use a _____________to create ECSs and migrate your services to the cloud.

Answer 22

system disk image

Question 23

contains only service data.

Answer 23

data disk image

Question 24

An ______ image is created from an external _____ image file. It is a special image that is not available on the ECS console.

Answer 24

ISO

Question 25

A full ECS image contains

Answer 25

pre-installed os software and service data.

Question 26

Marketplace image

Answer 26

It has an OS, application environment, and software pre-installed. You can use these images to deploy websites and application development environments in just a few clicks

Question 27

You can use an ECS or external image file to create an ECS private image. You can also:

Answer 27

▫ Use an ISO file to create an ECS system disk image. ▫ Use a CBR backup to create a full-ECS image. ▫ Use a BMS to create a system disk image.

Question 28

You can modify the following information of an image:

Answer 28

name, description, minimum memory, maximum memory, NIC multi-queue, and SR-IOV driver.

Question 29

Talk about in-region and cross-region replication

Answer 29

In region: is used for conversion between encrypted and unencrypted images or for enabling advanced features (such as fast ECS creation) for images. cross-region: is used for replicating a private image in the current region to the same account in another region.

Question 30

Encrypted images can be shared with other users or published in the Marketplace.

Answer 30

False: Encrypted images cannot be shared with other users or published in the Marketplace.

Question 31

________________________ provides tenants with dedicated servers featuring excellent computing performance equivalent to physical servers as well as high security and reliability.

Answer 31

BMS

Question 32

_____________ provides tenants with dedicated servers featuring excellent computing performance equivalent to physical servers as well as high security and reliability.

Answer 32

Bare Metal Server (BMS)

Question 33

_______________ service offers both the stability of traditional hosted servers and the high scalability of cloud-based services.

Answer 33

The BMS

Question 34

True or false : physical servers do not have performance loss due to no virtualization overhead.

Answer 34

true

Question 35

An _______ disk can be attached to multiple BMSs, enabling cluster-based application deployment.

Answer 35

EVS

Question 36

: A BMS can have multiple EVS disks attached, each as large as _____ TB. EVS disk capacity can be expanded as needed and you only pay for what you use.

Answer 36

32

Question 37

key aspect of BMS

Answer 37

No virtualization overhead

Question 38

Database scenario - BMS

Answer 38

Key database services for government, enterprise, and financial services must be carried on physical servers with dedicated resources, isolated networks, and guaranteed performance.

Question 39

Container scenario- BMS

Answer 39

Internet elastic service load. Compared with VMs, BMS containers provide higher deployment density, lower resource overhead, and more agile deployment efficiency.

Question 40

_____________ are a kernel virtualization technology originating with Linux. They provide lightweight virtualization to isolate processes and resources.

Answer 40

Containers

Question 41

__________ is the first system that allows containers to be portable in different machines. It simplifies both the application packaging and the application library and dependency packaging.

Answer 41

Docker

Question 42

Why are Docker containers called like that?

Answer 42

Because an isolated process is independent of the host and other isolated processes

Question 43

provides functions such as service discovery, scaling, load balancing, self-healing, and even leader election, freeing developers from infrastructure-related configurations

Answer 43

Kubernetes

Question 44

is a highly scalable, high-performance, enterprise- class Kubernetes service for you to run containers and applications.

Answer 44

Cloud Container Engine (CCE)

Question 45

The ______________NUMA architecture and high-speed InfiniBand network cards yield a three- to five-fold improvement in computing performance

Answer 45

Bare Metal

Question 46

You can create ______master nodes for your cluster control plane to avoid single points of failure.

Answer 46

3

Question 47

CCE supports heterogeneous computing architectures such as _____,_______, and______.

Answer 47

GPU, NPU, Arm

Question 48

CCE can use various heterogeneous infrastructures, such as:

Answer 48

high-performance ECSs, bare metal server, and GPU-accelerated ECSs.

Question 49

Supporting multi-AZ and multi-region disaster recovery, _____ ensures high availability of Kubernetes clusters.

Answer 49

CCE

Question 50

A _______ is a group of one or more cloud servers (also known as nodes) in the same subnet. It has all the cloud resources (including VPCs and compute resources) required for running containers.

Answer 50

cluster

Question 51

A _____ is the smallest and simplest unit in the Kubernetes object model that you create or deploy. A _____ encapsulates an application container (or, in some cases, multiple containers), storage resources, a unique network IP address, and options that govern how the containers should run.

Answer 51

pod

Question 52

A ______ is a cloud server (virtual or physical machine) running an instance of the Docker Engine. Containers are deployed, run, and managed on _______. The _____ agent (kubelet) runs on each node to manage container instances on the _______. The number of ______ in a cluster can be scaled.

Answer 52

node

Question 53

A ________ is an abstract method that exposes a group of applications running on a pod as network services.

Answer 53

service

Question 54

A __________ is a running instance of a Docker image. Multiple ________ can run on one node. ___________ are actually software processes. Unlike traditional software processes, _______ have separate namespace and do not run directly on a host.

Answer 54

container

Question 55

________ become containers at runtime, that is, containers are created from images. Containers can be created, started, stopped, deleted, and suspended..

Answer 55

Images

Question 56

Whats a workload?

Answer 56

an application running on Kubernetes.

Question 57

Workloads classified in Kubernetes include

Answer 57

Deployments, StatefulSets, DaemonSets, jobs, and cron jobs.

Question 58

 Deployment

Answer 58

Pods are completely independent of each other and functionally identical. They feature auto scaling and rolling upgrade. Typical examples include Nginx and WordPress.

Question 59

 StatefulSet

Answer 59

Pods are not completely independent of each other. They have stable persistent storage, and feature orderly deployment and deletion. Typical examples include MySQL-HA and etcd.

Question 60

A __________________ ensures that all or some nodes run a pod. It is applicable to pods running on every node. Typical examples include Ceph, Fluentd, and Prometheus Node Exporter.

Answer 60

DaemonSet

Question 61

It is a one-time task that runs to completion. It can be executed immediately after being created. Before creating a workload, you can execute a _____ to upload an image to the image repository.

Answer 61

 Job

Question 62

It runs a job periodically on a given schedule.

Answer 62

CronJob

Question 63

 ClusterIP

Answer 63

ClusterIP Service, as the default Service type, is exposed through the internal IP address of the cluster. If this mode is selected, Services can be accessed only within the cluster.

Question 64

how are nodeport services exposed?

Answer 64

through the IP address and static port of each node. A ClusterIP Service, to which a NodePort Service will route, is automatically created.

Question 65

______ automatically completes code compilation, image build, grayscale release, and container-based deployment based on code sources.

Answer 65

CCE