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Viewing questions 11-20 out of questions

Questions # 11:

User A is the system administrator of a company who frequently travels to Shanghai. Each time he remotely logs on to the server in Shanghai, an alert is reported, prompting, “Someone is remotely logging on to the server. Please pay attention to your server security.” Which of the following methods can be used to quickly and automatically resolve this problem?

Options:

Open a ticket immediately to consult Alibaba Cloud engineers.

Ask the company leaders for help.

Log on to Alibaba Cloud console, and add a frequent logon location to the Security Center configuration item.

Call a friend for help, who is a famous hacker in the industry.

Questions # 12:

Alibaba Cloud Content Delivery Network (CDN) is a distributed network that is built and overlaid on the bearer network. It is composed of edge node server clusters distributed across different regions.

CDN acceleration is especially suitable for scenarios where there is significant site traffic and the static resource is repeatedly used by different users. The higher the repeated access rate, the more significant the acceleration effect.

Options:

TRUE

FALSE

Questions # 13:

Company A constructed a sales management platform using three Elastic Compute Service (ECS) instances. One of the instances runs MySQL, and is used as the database server. The other two instances are used as Web servers After some time, the number of employees in Company A dramatically increases, leading to higher sales volumes At the same time, the platform response speed is gradually decreasing too.

According to the report from CloudMonitor, the average CPU utilization rate of the two Web servers exceeds 70%, and database load

reaches 75% Company A can select Alibaba Cloud_________ services.to cope with the issue and optimize the performance. (Number of correct answers: 2)

Options:

Import database data into Object Storage Service (OSS) to share the storage pressure on the platform

Incorporate Server Load Balancer (SLB) and add additional ECS instances to relieve the load on existing ECS instances

Use Content Delivery Network (CDN) to enhance content loading speed

Replace the self-built MySQL database with ApsaraDB for RDS to obtain better database performance, and utilize RDS read-only instances to handle read-only requests

Answer

B, D

Explanation

Option B is correct because using Server Load Balancer (SLB) and adding additional ECS instances can help to distribute the traffic among multiple servers and improve the availability and scalability of the platform. SLB can also provide health checks and fault tolerance for the ECS instances1

Option D is correct because replacing the self-built MySQL database with ApsaraDB for RDS can provide better database performance, security, and reliability. ApsaraDB for RDS is a fully managed cloud database service that supports MySQL, SQL Server, PostgreSQL, and other engines. It can automatically handle tasks such as backup, recovery, monitoring, and patching. Using RDS read-only instances can also handle read-only requests and reduce the load on the primary database2

Option A is incorrect because importing database data into Object Storage Service (OSS) will not share the storage pressure on the platform. OSS is a cloud storage service that provides high durability, availability, and scalability for storing unstructured data such as images, videos, and documents. It is not suitable for storing structured data such as database tables. Moreover, importing data into OSS will incur additional costs and latency3

Option C is incorrect because using Content Delivery Network (CDN) will not enhance the content loading speed of the platform. CDN is a distributed network that delivers content to users based on their geographic locations, the origin of the content, and the content delivery server. It is mainly used to accelerate the delivery of static content such as images, videos, and scripts. It is not effective for dynamic content such as database queries and transactions4

References:

1: Server Load Balancer - Alibaba Cloud

2: ApsaraDB for RDS - Alibaba Cloud

3: Object Storage Service - Alibaba Cloud

4: Content Delivery Network - Alibaba Cloud

Questions # 14:

You are designing a solution for a startup company, the proposed solution is like this You suggest they use ECS instances to process requests from mobile App clients, and use SLB to distribute data traffic and ensure the load across each backend ECS instance is balanced.

Moreover to deal with volatile fluctuations in business volume (page views are much higher on the weekends), you also suggest they use Auto Scaling to dynamically increase or reduce computing resources.

The company is satisfied with the solution you proposed. However, they have one concern that when removing an idle instance from the scaling group: if Auto Scaling shuts the instance down directly, the service running on that instance will be abruptly terminated, resulting in poor user experience.

In order to eliminate your customer's concern, which of the following solutions should you recommend them?

Options:

Find the ECS instance that is going to be removed from the backend server pool of the SLB instancer and automatically set the weight of this ECS instance to 0. This instance will not be assigned with new requests, and will be automatically removed from the backend server pool after existing tasks are completed.

First, insert a script into the image for creating the ECS instance Second, make the script run automatically when the operating system in this ECS instances is about to shut down. This script contains the processing logic that can ensure the instance finish all the remaining tasks before shutting down.

Find the ECS instance that is going to be removed from the backend server pool of the SLB instance, and manually remove this instance from the backend server pool Applications running on this ECS instance will normally return results, but this instance will not be assigned with new requests.

Use the Lifecycle Hook function embedded m Auto Scaling Define a suitable timeout and a web hook to do the necessary work before the instance is removed.

Questions # 15:

In some cases, you can purchase Elastic Compute Service (ECS) instances in Pay-As-You-Go mode to meet the demands for requiring additional computing resources in a particular period of time and set an auto-release time to release these Pay-As-You-Go instances later. ___________________ is a correct description of this operation.

Options:

You can set the auto-release time only when creating the Elastic Compute Service (ECS) instance

You can set the auto-release time of the ECS instance once

You can set the auto-release time of the ECS instance multiple times

You cannot cancel the set auto-release time of the ECS instance

Questions # 16:

Cloud Disk is a block storage product provided by Alibaba Cloud (especially for ECS). It features low latency and high reliability. Which of the following statements is true for Cloud Disk?

Options:

A Cloud Disk can be attached to an instance in a different region than the Cloud Disk.

Cloud Disk can be attached between ECS instances under the same account and in the same zone.

Cloud Disk cannot be attached or detached between ECS instances.

Cloud Disk can be used directly without formatting.

Questions # 17:

There are two types of Alibaba Cloud SLB: private network SLB and public network SLB. You can freely choose between private network SLB and public network SLB based on your business scenarios. Alibaba Cloud will assign a private or public IP address to your SLB according to your choice.

Options:

TRUE

FALSE

Questions # 18:

Alibaba Cloud ECS is a simple and efficient computing service. ECS helps you quickly deploy applications, improve your O&M efficiency, and reduce IT costs. ECS belongs to this type of service _____________.

Options:

SaaS (Software as a Service)

PaaS (Platform as a Service)

IaaS (Infrastructure as a Service)

DaaS (Data as a Service)

Questions # 19:

Alibaba Cloud Object Storage is suitable for storing unstructured data such as pictures and videos.

Options:

True

False

Questions # 20:

On an Alibaba Cloud Elastic Compute Service (ECS) instance, if you change the MAC address of the NIC within the operating system, this may result in network connection failure.