Cloud Computing | Week 3

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Session: JULY-DEC 2023

Course Name: Cloud Computing

Course Link: Click Here

These are Nptel Cloud Computing week 3 Assignment 3 Answers

1) In the context of aggregated demand in resource provisioning in the cloud, how does adding n independent demands affect the coefficient of variation (Cv)?
A) Increases the Cv
B) Decreases the Cv
C) Does not change the Cy
D) Inversely proportional to the mean

Answer: B) Decreases the Cv

2) What does the term “biasness towards vendors” imply in the context of SLA monitoring?
A) Vendor-driven selection of monitoring parameters
B) Customer-driven selection of monitoring parameters
C) Balanced approach in monitoring parameters
D) Lack of active monitoring on the customer’s side

Answer: A) Vendor-driven selection of monitoring parameters

3) In the Openstack storage concept, _______ storage persists until the VM is terminated and is managed by _________.
A) Nova, Cinder
B) Ephemeral, Cinder
C) Cinder, Ephemeral
D) Ephemeral, Nova

Answer: D) Ephemeral, Nova

These are Nptel Cloud Computing week 3 Assignment 3 Answers

4) What condition makes periodic provisioning acceptable in the presence of linear demand?
A) High resource utilization
B) Non-linear demand
C) Instantaneous demand
D) Flat demand

Answer: D) Flat demand

5) What is (are) the key factor(s) to consider in a hybrid model for utility pricing?
A) Reliability and accessibility
B) Network cost and usage costs
C) Peak to average demand ratio
D) Interoperability overhead

Answer: C) Peak to average demand ratio

6) What architecture is used in a parallel database for the efficient execution of SQL queries?
A) Shared memory architecture
B) Shared disk architecture
C) Shared nothing architecture
D) Shared cache architecture

Answer: C) Shared nothing architecture

These are Nptel Cloud Computing week 3 Assignment 3 Answers

7) What type of environment benefits from utility pricing?
A) Environments with fixed demand levels
B) Environments with limited resource scalability
C) Environments with variable demand levels
D) Environments with prepaid resource allocation

Answer: C) Environments with variable demand levels

8) What is the role of Neutron in the provisioning flow in OpenStack?
A) Fetches information about the whole cluster from the database
B) Publishes a message to the compute queue to trigger VM provisioning
C) Configures IP, gateway, DNS name, and L2 connectivity.
D) Contacts Cinder to get volume data

Answer: C) Configures IP, gateway, DNS name, and L2 connectivity.

9) How does the master node in the Google File System maintain communication with chunk servers?
A) Command messages
B) Update messages
C) Query messages
D) Heartbeat messages

Answer: D) Heartbeat messages

These are Nptel Cloud Computing week 3 Assignment 3 Answers

10) What does the ‘availability’ metric represent in the monitoring and auditing of SLAs?
A) The speed at which a service responds
B) The percentage of uptime for a service
C) How often the service is available
D) The ability for a resource to grow infinitely

Answer: B) The percentage of uptime for a service

These are Nptel Cloud Computing week 3 Assignment 3 Answers

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Session: JAN-APR 2023

Course Name: Cloud Computing

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These are Nptel Cloud Computing week 3 Assignment 3 Answers

Q1. Which of the following is/are properties of Web Service SLAs?
A. SLA automation is required for negotiation, provisioning, service delivery and monitoring.
B. The QoS parameters are response time, SLA violation rate for reliability, availability and cost of service.
C. UDDI (Universal Description Discovery and Integration) is used for resource allocation.
D. The QoS parameters are related to security, privacy, trust, management, etc.

Answer: B, C

Q2. A task takes time T in a uniprocessor system. In a parallel implementation, the task runs on P processors parallelly. The parallel efficiency is Eff, where 0<Eff<1. What is the time taken by each processor (M) in this implementation?
A. M=T
B. M = T/(EffxP)
C. M=T/P
D. M=(TxEff)/P

Answer: B. M = T/(EffxP)

These are Nptel Cloud Computing week 3 Assignment 3 Answers

Q3. Row-oriented storage is optimal for transaction processing applications.
A. True
B. False

Answer: A. True

Q4. Which of the following is/are the SLA requirement(s) for PaaS cloud delivery model?
A. Transparency
B. Data Retention and Deletion
C. Privacy
D. Regulatory compliance

Answer: A, C, D

These are Nptel Cloud Computing week 3 Assignment 3 Answers

Q5. In a cloud, total service uptime is 175 minutes and availability of the service is 0.85. What is the service downtime?
A. 55 minutes
B. 148.75 minutes
C. 26.25 minutes
D. 45 minutes

Answer: C. 26.25 minutes

Q6. Which of the following database system/architecture follow(s) Quorum protocol for a large number of concurrent reads & writes?
A. BigTable
B. Dynamo
C. Datastore
D. Google File System (GFS)

Answer: B. Dynamo

These are Nptel Cloud Computing week 3 Assignment 3 Answers

Q7. Match the components of OpenStack with their functions.
A. 1->B, 2->D, 3->A, 4->C
B. 1->B, 2->A, 3->D, 4->C
C. 1->C, 2->B, 3->D, 4->A
D. 1->D, 2->A, 3->B, 4->C

Answer: D. 1->D, 2->A, 3->B, 4->C

Q8. Let D(t) and R(t) be the instantaneous demand and resources at time t respectively. If demand is exponential (D(t)=e’), any fixed provisioning interval (tp) according to the current demands will fall linearly behind.
A. TRUE
B. FALSE

Answer: B. FALSE

These are Nptel Cloud Computing week 3 Assignment 3 Answers

Q9. Which of the following statement(s) regarding OpenStack storage is/are wrong?
A. Object storage is managed by Cinder
B. Both ephemeral storage and block storage are accessible from within VM
C. Block storage persists until VM is terminated
D. Ephemeral storage is used to run operating system and/or scratch space

Answer: A, C

Q10. Statement 1: Multiple KPIs are aggregated to SLA.
Statement 2: SLA contains SLO.
A. Both statement 1 and 2 are correct
B. Statement 1 is correct and statement 2 is incorrect
C. Statement 2 is correct and statement 1 is incorrect
D. Both statement 1 and 2 are incorrect

Answer: C. Statement 2 is correct and statement 1 is incorrect

These are Nptel Cloud Computing week 3 Assignment 3 Answers

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Session: JULY-DEC 2022

Course name: Cloud Computing NPTEL

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These are Nptel Cloud Computing week 3 Assignment 3 Answers

Q1. Which of the following is/are NOT SLA requirement(s) of PaaS cloud delivery model?
a. Privacy
b. Data Retention and Deletion
c. Machine-Readable SLAs
d. Certification

Answer: c. Machine-Readable SLAs

Q2. Which of the following is/are true regarding penalty cost? (Here D(t) and R(t) are instantaneous demand and resources at time t.)
a. Penalty cost ox ID()/R()|dt
b. If demand is flat, penalty is equal to 0.
c. If demand is exponential (D(t)=e’), any fixed provisioning interval (tp) according to the current demands will fall linearly behind.
d. The penalty cost for exponential demand is exponential.

Answer: b, d

Q3. Row-oriented storage is efficient for data-warehouse workloads.
a. TRUE
b. FALSE

Answer: b. FALSE

These are Nptel Cloud Computing week 3 Assignment 3 Answers

Q4. Which of the following is/are example(s) of cloud SLA(s) with IlaaS delivery model?
a. Amazon EC2
b. Google App Engine
c. Salesforce CRM
d. Zoho mail

Answer: a. Amazon EC2

Q5. Which of the following OpenStack components is used for block storage services?
a. Keystone
b. Cinder
c. Swift
d. Neutron

Answer: b. Cinder

Q6. In cloud, service downtime is 30 minutes and availability of the service is 0.80. What is the service uptime?
(a) 120 minutes
(b) 60 minutes
(c) 150 minutes
(d) 135 minutes

Answer: (c) 150 minutes

These are Nptel Cloud Computing week 3 Assignment 3 Answers

Q7. In Google File System (GFS), the master maintains regular communication with the chunk servers.
a. TRUE
b. FALSE

Answer: a. TRUE

Q8. In a system, 400 unit workloads have been added. What will be the penalty?
a. 40%
b. 100 %
c. 20%
d. 8000%

Answer: c. 20%

Q9. Which of the following option(s) is/are correct?
a. Service Level Agreement(SLA) contains Service Level Objectives(SLO)
b. Service Level Objectives(SLO) contains Service Level Agreement(SLA)
c. Multiple Service Level Agreements (SLAs) are aggregated to Key Performance Indiocator (KPI)
d. Key Performance Indiocators (KPIs) are aggregated to Service Level Objectives(SLO)

Answer: a, d

These are Nptel Cloud Computing week 3 Assignment 3 Answers

Q10. Statement 1: In OpenStack block storage, the stored objects persist until the VM is terminated.Statement 2: In OpenStack ephemeral storage, the stored objects are accessible from within VM as local file system.
a. Both statement 1 and 2 are correct
b. Statement 1 is correct and statement 2 is incorrect
c. Statement 2 is correct and statement 1 is incorrect
d. Both statement 1 and 2 are incorrect

Answer: c

These are Nptel Cloud Computing week 3 Assignment 3 Answers

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Nptel Cloud Computing week 3 Assignment 3 Answers

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