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Which of the following does not reflect the self- service feature of cloud computing? (Single answer)

• Engineer A purchases an ECS from HUAWEI CLOUD to meet his/her own requirements
• Engineer B changes the operating system of the ECS purchased by himself/herself from Linux to Windows
• Engineer C increases the number of CPUs of the ECS purchased by himself/herself from 2 to 4
• Engineer D receives an SMS notification from the ECS provider one week before the ECS expires.

Which of the following is about the on-demand self-service feature of cloud computing? (Single answer)

• Users do not need to communicate the service providers at all when using cloud computing resources.
• After determining the required cloud computing service, users can apply for cloud computing resources by themselves.
• The cloud computing service providers only need to prepare the cloud services and users will complete remaining process all by themselves
• When using cloud computing resources, the users need to solve all by problems by themselves

Which of the following are true about the ubiquitous network access feature of cloud computing? (Multiple answers)

• With network connections, users can use purchased cloud computing resources from different terminals.
• With network connections, users can use purchased cloud computing resources at different places.
• With network connections, users can connections, users can use purchased cloud computing resources anytime
• With network connections, users can view the status of purchased cloud computing resources anytime.

Which of the following is true about the resource pooling feature of cloud computing? (single answer)

• The resource pooling feature of cloud computing shields the difference between resources of the same type.
• The resource pooling feature of cloud computing allows CPUs and disks to be added to the same resource pool
• The resource pooling feature of cloud computing is the prerequisite for the ubiquitous network access feature.
• The resource pool feature of cloud computing depends on the virtualization technology

) Which of the following are true about the fast and elastic scaling feature of cloud computing? (Multiple answers)

• Engineer A purchases an ECS on HUAWEI CLOUD.
• Engineer B increases the number of CPUs of an ECS purchased on HUAWEI CLOUD from 2 to 4.
• Engineer C increases the number of ECSs in a cluster to 10 during the Double 11 (November 11) shopping festival and restores the number of ECSs to 4 one week later.
• An ECS purchased by engineer D is reclaimed after it expires due to no renewal.

The measurable service feature of cloud computing refers to charging based on time and usage

• True
• false

Cloud computing is a product of Internet and computing technologies development. Therefore, cloud computing is indispensable of network connections.

• True
• false

There are many milestone events in milestone events in the development of the Internet. Which of the following is true about the time sequence of the milestone events? (Single answer)

• the Establishment of TCP/IP protocol --> Birth of ARPANET -> "www officially open to the public --> Birth of DNS
• Birth of DNS --> Establishment of the TCP/IP protocol Birth of ARPANET -> "www officially open to the public
• "www officially open to the public Birth of DNS --> Establishment of the TCP/IP protocol Birth of ARPANET
• Birth of ARPANET --> Establishment of the TCP/IP protocol --> Birth of DNS "www officially open to the public

) Which of the following is true about cloud computing? (single answers)

• Cloud computing is a technology that enables users to obtain IT resources anytime and anywhere.
• Various IT resources of cloud computing can be used only after being paid.
• The IT resources of cloud computing can be used only through network connections
• During the process of obtaining IT resources, users need to repeatedly negotiate with cloud computing service provider

which of the following can implement computing virtualization and improve resource utilization in the era of cloud computing 1.0? (Multiple answers)

• KVM
• Open Stack
• Hyper-V
• Xen