USN 204MC006
Ph.D./M.S.(Engg.) by Research Degree Examination, Aug./Sep. 2023
Cloud Computing
Time: 3 hrs. Max. Marks: 100
Note: Answer any FIVE full questions, choosing ONE full question from each module.
2. Any revealing of identification, appeal to evaluator and /or equations written eg, 42+8 = 50, will be treated as malpractice.
Module-1
1 a. Summarize cloud deployment models along with suitable enterprise applications for them.
(08 Marks)
b. “Notion of data security and privacy is still a concern for the cloud users, while all the
promises made by cloud service providers”. Examine this statement. (06 Marks)
c. A smart city is an urban area that uses different types of electronic data collection sensors to
Important Note : 1. On completing your answers, compulsorily draw diagonal cross lines on the remaining blank pages.
supply information which is used to manage assets and resources efficiently. This includes
data collected from citizens, devices and assets that is processed and analyzed to monitor
and manage traffic and transportation systems, power plants, water supply networks, waste
management, law enforcement, information systems, schools, libraries, hospitals and other
community services. Imagine yourself as a cloud service provider, who provides all three
service models propose a cloud-based system to support the smart cities. (06 Marks)
OR
2 a. With the help of a neat diagram, demonstrate how the palette of AWS services accessible via
the management console. (10 Marks)
b. Explain the working of RAID-5 technology, and how this can be used to address the Vendor
lock-in problem. (06 Marks)
c. How cloud computing handles the following:
(i) Reduction in upfront investments.
(ii) Reliability.
(iii) Infinitism in resources. (04 Marks)
Module-2
3 a. List the types of cloud applications that can be identified as batch processing systems.
(05 Marks)
b. Analyze the following statements :
(i) Choosing an optimal instance from those offered by the cloud infrastructure is a
critical factor.
(ii) Having single administrative domain is the major advantage of the cloud computing.
(08 Marks)
c. Write all the sequence of actions which gets invoked when a user calls the MapReduce
function. (07 Marks)
OR
4 a. Define a task and list its various attributes. Give suitable examples for fork routing and join
routing tasks. (07 Marks)
b. Describe in detail with necessary block diagram working of the ZooKeeper coordination
service. (06 Marks)
c. With required block diagrams, illustrate basic workflow patterns. (07 Marks)
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Module-3
5 a. Virtualization simplifies the use of resources, isolates users from one another, and supports
replication and mobility, but exacts a price in terms of performance and cost. Analyze each
one of these aspects for,
(i) Memory virtualization.
(ii) Processor virtualization. (08 Marks)
b. Differentiate Full and Para Virtualization. Compare their merits and demerits. (07 Marks)
c. Illustrate the various interfaces that the virtualization simulates to a physical object.
(05 Marks)
OR
6 a. Write a technical note on virtual machine security. (05 Marks)
b. Write the Xen components for the x86 architecture, and explain their functionalities.
(10 Marks)
c. Provide any three motivational factors for virtualizing the physical resources, and also state
three properties to be satisfied by virtualization as stated by Goldberg and Popek. (05 Marks)
Module-4
7 a. Define a threshold. Differentiate static threshold with dynamic threshold and write steps in
algorithm for proportional thresholding. (06 Marks)
b. Give the working of Fair Queuing algorithm for cloud scheduling, and analyze its influence
of cloud scheduling. (08 Marks)
c. Differentiate Machine learning based mechanism with control theory based mechanism for
the cloud resource management. (06 Marks)
OR
8 a. Demonstrate the mechanisms for the implementation of resource management policies on
cloud. (10 Marks)
b. Write a two-level control architecture, and answer the following :
(i) Role of controllers.
(ii) Main sources of instability in control system.
(iii) Policies used in autonomic systems. (10 Marks)
Module-5
9 a. Identify the main security threats for the SaaS cloud delivery model on a public cloud.
(08 Marks)
b. Summarize Virtual Security Service provided by VMM. (06 Marks)
c. Describe the concept of ‘Trust’ used in Cloud computing. (06 Marks)
OR
10 a. Identify the benefits and potential problems due to virtualization on public, private and
hybrid clouds. (08 Marks)
b. Answer the following with respect to privacy and its impact on cloud operations :
(i) Definition of privacy.
(ii) Main aspects of privacy.
(iii) Fair information practices for privacy management. (06 Marks)
c. By considering an example of online payment, illustrate the need for trusted applications and
trusted paths. (06 Marks)
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