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QUESTIONS WITH ANSWERS ON CLOUD COMPUTING
Q.1. Define cloud computing?
Ans.
Cloud computing refers to both the application delivered as services over the internetand the hardware and system software in the data centres that provide these services. Theservices themselves have long been referred to as software as a services (SaaS). So, we usethat term. The data centre hardware and software is what we call a cloud.
Q.2. What is public cloud?
Ans.
When a service provider makes resources available to general public over internet, thisis called public cloud.
Q.3. What is private cloud?
Ans.
It refers to internal data centre of a business or other organization that are not madeavailable to the public.
Q.4. What is the use of service provider?
Ans.
Service provider enjoys greatly simplified software installation and maintenance andcentralized control over versioning.
Q.5. What is the work of end users?
Ans.
End user can access the service
“
anytime, anywhere", share data and collaborate moreeasily and keep their data stored safely in the infrastructure.
Q.6. Write the name of top ten obstacles and opportunities for adoption and growth ofcloud computing?
Ans.
Availability of service, Data transfer and Auditability, Data lock in, Data confidentialityand Auditability, Performances unpredictability, Scalable storage, Bugs in large scaledistribution systems, scaling quickly, Reputation fate sharing, Software licensing.
Q.7.What are the essential characteristics of cloud computing?
Ans. On-demand self-services, Broad network access, Resource pooling, Rapid elasticity,Measured service.
Q.8. What are the advantages of "Software As A Service" (SaaS)?
Ans.
The advantages of "Software As a Service" are as under-
1.
Time-to-value: Saas based application performance management can be deployed in asmall fraction of time i.e. the time until you read this article.
2.
Cheap cost-Licenses, Maintenance, Administration, Hardware.
3.
It’s
easy to use.
4.
Its highly scalable.
Q.9. What are the advantages of cloud computing?
Ans.
Cost efficient, almost unlimited storage, backup and recovery, automatic softwareintegration, easy access to information, quick development.
Q.10. What are the disadvantages of cloud computing?
Ans.
Technical issues, security in the cloud, prone to attack.
Q.11. What is Hypervisor in Cloud Computing and its types?Ans.
The hypervisor is a virtual machine monitor (VMM) that manages resources for virtualmachines. The name hypervisor is suggested as it is a supervisory tool for the virtualmachines. There are mainly two types of hypervisors:
Type-1:
the guest Vm runs directly over the host hardware,e.g Xen, Hyper-V, VmWare ESXi
Type-2:
the guest Vm runs over hardware through a host OS,e.g Kvm, Oracle virtualbox
Q.12. Why should one prefer public cloud over private cloud?
Ans.
The cloud technology is the best example of sustainable technology that utilizes all thecomputing resources. If a person needs to setup a quick business and wants to host itswebsite, he need not require setup a full-fledged private cloud. Rather he should go for publiccloud hosting that provides different pay-per-use subscriptions, which could actually result in
Q.13. What are main features of cloud services?Ans.
Some important features of the cloud service are given as follows:
Accessing and managing the commercial software.
Centralizing the activities of management of software in the Web environment.
Developing applications that are capable of managing several clients.
Centralizing the updating feature of software that eliminates the need of downloadingthe upgrades.
Q.14. How many types of deployment models are used in cloud?Ans.
There are 4 types of deployment models used in cloud:
Public cloud
Private cloud
Community cloud
Hybrid cloud
Q.15. Explain hybrid and community cloud.Ans.
The
hybrid
cloud consists of multiple service providers. This model integrates variouscloud services for Hybrid Web hosting. It is basically a combination of private and publiccloud features. It is used by the company when a company has requirements for both the private and public clouds. Consider an example when an organization wants to implementthe
SaaS (Software as a Service)
application throughout the company. The implementationrequires security that can be provided by the private cloud used inside the firewall. Theadditional security can be provided by the VPN on requirement. Now, the organization has both the private and public cloud features.The
community
cloud provides a number of benefits, such as privacy and security. Thismodel, which is quite expensive, is used when the organizations having common goals andrequirements are ready to share the benefits of the cloud service.
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