Alibaba Cloud Computing ACP-Cloud1 Release Date

Page: 12 / 12

Question 48

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)

Options:

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

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.

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.

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

Question 49

When creating cloud product instances in Alibaba Cloud, you can choose the default VPC and VSwitch. The difference between non-default VPC/VSwitch and default VPC/VSwitch is that default VPC and VSwitch can only be created by Alibaba Cloud. Which of the following statements is incorrect about default VPC?

Options:

There is only one default VPC for each region

Default and non-default VPCs have different constraints and operations

Default VPCs are created for you by Alibaba Cloud. Any VPCs you create are non-default VPCs

Default VPCs are not counted in your given VPC quota in Alibaba Cloud

Question 50

An Alibaba Cloud RDS read-only instance has its data synchronized from the master instance. Which of the following can be performed by the read-only instance from the RDS management console?

Options:

Backup policy configuration and manual backup

Database creation or deletion

Editing its own whitelist

Account authorization and account password changing

Question 51

In traditional IT scenarios, it is very difficult to achieve 99.99999999% data reliability for massive data storage and avoid SPOF (Single Point of Failure) at the same time. In Alibaba Cloud, the ________________ service supports the features described above.