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

• True

• False

Different Alibaba Cloud VPCs are completely isolated from each other.

By default, the VPCs cannot communicate with each other over Intranet, but you can establish VPN connections via the Internet to achieve interconnection between VPCs.

• True

• False

The Alibaba Cloud CDN can directly accelerate access to the files stored in OSS and reduce OSS traffic costs.

• True

• False

All RDS for MySQL backups are full backups.

• True

• False

uto 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)

• True

• False

Many of Alibaba Cloud services provide highly reliable data storage capacity. For example, Object Storage Service (OSS) promises that its data reliability is no less than 99 99999999%. This high data reliability is solely achieved by RAID 0+1 redundancy technology.

• True

• False

Which of the following statements is NOT correct, when comparing RDS with a self-built database?

• Self-built database support quick deployment and elastic scaling.

• RDS requires no O&M while self-built database require a dedicated DBA for maintenance, which

  results in high HR costs

• RDS features a high availability of 99 95% while self-built databases require you to implement

  data protection primary-standby replication, and RAID all by yourself.

• RDS provides automatic backup while self-built databases require you to prepare storage space

  for backup copies and regularly verify that these copies can be restored.

Auto Scaling is a management service that can automatically adjust elastic computing resources

based on your business needs and policies It supports adding an existing ECS instance into the

scaling group but imposes certain requirements on instance region In this case, which of the

following statements is true?

• The instance and the scaling group must be in the same region and zone.

• The instance and the scaling group must be in the same region but not necessarily the same zone.

• Each scaling group can span up to two regions. After adding the ECS instance, the number of

  regions of all the ECS instances in the scaling group must be no greater than two.

• The instance and the scaling group can be in different regions and zones.

Recently, response speed of a certain Alibaba Cloud Elastic Compute Service (ECS) instance is

unacceptably slow. By using CloudMonitor we discovered that the ECS instance utilizes more than

80% of the assigned bandwidth.

Which of the following approach can address this issue and without the need to reboot the ECS

instance?

• Upgrade the bandwidth of the ECS instance

• None of the above

• Upgrade the CPU and memory of the ECS ins

• Add a disk to the ECS instance

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?

• 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

• SLB cannot assign more requests to certain ECS instances.

• Choose Round-Robin model and ECS instances with higher capacities will surely be assigned with

  more requests

• Choose Weighted Least-Connection mode, and ECS instances with higher capacities will surely be

  assigned with more requests.