ACP-CLOUD1 Online Practice Questions and Answers

A startup video streaming company deploys its service on Alibaba Cloud Elastic Compute Service (ECS) Christmas is coming soon and the CEO knows that they need to prepare more computing resources However, they don't want to purchase a large number of Elastic Compute Service (ECS) instances tor a long period of time. Instead, they want to buy ECS instances for a short period of time and release them after the event is over. Which of the following billing methods of ECS is the most suitable?

A. Pay-As-You-Go Only

B. Pay-As-You-Go with Reserved Instances

C. Subscription with Reserved Instances

D. Pay-As-You-Go with Savings Plan

A video company uses SLB to distribute user requests to 20 ECS instances with the same configuration to response these requests. As the Spring Festival approaches, service traffic would double during holidays (based on past experience).

Thus, you use Auto Scaling to elastically adjust computing resources. Since the services is online for many years, you have historic records that can help predict the upcoming service traffic and choose the scaling mode freely.

In this scenario, which of the following options are feasible and with minimum operation efforts? (Number of correct answers: 2)

A. Cloud monitor and event-triggered task: Dynamically adds ECS instances during resource shortage and reduces ECS instances during idle hours by monitoring the CPU utilization rate and workload

B. Scheduled task: Increases the number of ECS instances to 40 on the first day of the holidays and reduce the number to 20 after the holidays.

C. Manual mode: Set the minimum number of instances to 40 on the first day of the holidays and change the number to 20 after the holidays.

D. Healthy check mode: Ensures that all the current ECS instances in scaling groups are working correctly to meet user access requests.

If you need to accelerate a certain domain name (such as abc.com) via Alibaba Cloud Content Delivery Network (CDN), you must add it to "CDN Domain Name List" in the CDN service. After added successfully, you will get a CNAME address A Next, you need to modify domain name resolution and direct the domain name (such as abc.com) to CNAME address A. Which of the following is a NOT correct description of modifying domain name resolution?

A. If your domain name (such as abc.com) is transferred to Alibaba Cloud in advance, and managed by the same Alibaba Cloud account, you can perform one-step resolution modification.

B. The CNAME address allocated to the domain name (such as abc.com) will point to an IP address. This IP address resolving mechanism is intelligently managed by Alibaba Cloud CDN system.

C. The DNS service provider used by the domain name (such as abc.com) must support intelligent resolution.

D. The DNS service provider used by the domain name (such as abc.com) can be companies other than Alibaba Cloud.

SLB is a load balancing service that distributes traffic to multiple cloud servers It provides a wide range of functions to meet the needs of various business scenarios If a user wants to use SLB and ECS instances to deploy two-way authenticated HTTPS websites, the following statement is correct_______.

A. SLB can only host SSL certificates, not CA certificates.

B. You need to host server SSL certificates and client CA certificates on SLB

C. SLB can only host CA certificates, not SSL certificate

D. SLB can only support HTTPS one-way authentication

Auto Scaling can automatically adjust the number of ECS instances based on user-defined scaling rules to meet service needs. If a user cannot predict service changes or does not have enough history data, he/she can still use dynamic scaling mode to automatically add/remove ECS instances based on certain CloudMonitor performance metrics (such as the CPU utilization rate)

A. True

B. False

The backend server pool of an Alibaba Cloud SLB contains multiple ECS instances, which may have different service capacities. To exploit the different service capacities of backend ECS instances, which of the following statements is correct?

A. Choose Weighted Round Robin mode to set higher weights to ECS instances with higher capacities The higher the weight of the backend ECS instance the higher chance that the instance will receive requests.

B. SLB cannot assign more requests to certain ECS instances.

C. Choose Round-Robin model and ECS instances with higher capacities will surely be assigned with more requests.

D. Choose Weighted Least-Connection mode, and ECS instances with higher capacities will surely be assigned with more requests.

Object Storage Service (OSS) supports sub accounts, and you can allocate access permissions to different buckets for each sub account.

A. True

B. False

When creating an ECS instance in your Alibaba Cloud VPC, you must specify a VSwitch for that instance at the same time. Otherwise, you will not be able to create this ECS instance.

A. True

B. False

Alibaba Cloud Server Load Balancer (SLB) provides services for distributing traffic among multiple ECS instances SLB can expand the application system's service capacity through traffic distribution, and improve the system's availability by eliminating SPoFs (Single Points of Failure). Which of the following statements are correct? (Number of correct answers; 2)

A. One of SLB's features is the Health Check. If some of the backend ECS instances are down, whereas other backend ECS instances can still provide services, then the system can continue to work normally.

B. When recreating an SLB instance that has an Internet IP address, a new Internet IP address will be assigned to the SLB instance.

C. Before using SLB to provide external services, make sure that you have installed and correctly configured the SLB agent on all of the backend ECS instances.

D. SLB provides a function to automatically synchronize data among backend ECS instances using rsync remote synchronization.

The difference between public and private Server Load Balancers (SLBs) is that private SLBs connect to their backend ECS instances using the private network (Intranet) while public SLBs connect to their backend ECS instances using the public network (Internet).

A. True

B. False