ACA-Cloud1 무료 덤프문제 온라인 액세스

Auto Scaling can automatically remove unhealthy ECS instances from the scaling group (this feature is called Elastic Self-Health). Yet, after removal, the user has to manually add equivalent amount of new ECS instances back to the scaling group.

• A.TRUE
• B.FALSE

A video streaming company uses SLB to distribute user requests to 30 ECS instances (the 30 ECS instances have the same configuration). Yet, the company finds that the service traffic soars dramatically every night from 20:00 to 02:00. According to their calculation, the evening traffic is 100% higher than the traffic in other periods of time. To properly respond to user requests, which of the following methods is most preferred from the perspective of cost and implementation simplicity?

• A.Create 30 ECS instances based on the custom image and add them to SLB. Then, configure weights for these ECS instances to respond to user requests every night from 20:00 to 02:00, and reset those weights to zero for other periods of time.
• B.Configure Auto Scaling appropriately to automatically add or reduce ECS instances.
• C.Configure Auto Scaling appropriately to automatically upgrade/downgrade the ECS instances.
• D.Manually create 30 ECS instances using the custom image, and then add them to SLB every night before 20:00 and remove them after 02:00.

Which three of the following statements about domain name binding to your OSS bucket are correct? (Choose three.)

• A.mapping a domain name to your bucket endpoint is mandatory
• B.your customized domain name need to be put on record in MIIT (Ministry of Industry and Information Technology)
• C.Your customized domain name will be audited by Alibaba Cloud
• D.the number of domain names you bind to one bucket can't exceed 20

Which of the following statements is wrong when comparing RDS with self-built database?

• A.RDS provides automatic backup while self-built database requires you to prepare storage space for backup copies and regularly verify that these copies can be restored.
• B.RDS features a high availability of 99.95% while self-built database requires you to implement data protection, primary-standby replication, and RAID all by yourself.
• C.Self-built database supports quick deployment and elastic scaling.
• D.RDS requires no O&M while self-built database requires a dedicated DBA for maintenance, which results in high HR cost.

Your friend purchases some Alibaba Cloud resources and uses them to build an online training website. Before the site goes online, your friend wants to perform some performance tests but doesn't know how to do it. In this case, which of the following services can help?

• A.Load and Performance Testing Service
• B.Support Ticket Service
• C.None Of The Above
• D.After-Sales Support Service