# Cloud computing Assignment 5 Answers 2021 NPTEL

NPTEL Cloud computing Assignment 5 Answers 2021:- We do not claim 100% surety of answers, these answers are based on our sole knowledge, and by posting these answers we are just trying to help students, so we urge do your assignment on your own.

Q1. S1: SLO is a formal contract between a service provider and a service consumer. S2: SLA contains Service Level Objectives (SLO).

a) S1 is True and S2 is False

b) S1 is False and S2 is True

c) Both S1 and S2 are True

d) Both S1 and S2 are False

Ans:- c)

Q2. SI: Multiple SLAs are aggregated to KPI 52: KPIs are aggregated to SLO

a) S1 is Tive and 52 is False

b) S1 is False and 52 is True

c) Both S1 and 52 are True

d) Boch S1 and 52 are False

Ans:- b)

Q3. Which of the following is/are not a possible parameter of service level agreement (SLA) in cloud

a) Response Time or Latency

b) Availability of the Services

c) Electricity Cost

d) Warranty of the Services

Ans:- (c), (d)

Q4. U <PA indices that cloud is cheaper than owning computer infrastructures, Where U is Utility Premium, P is Peak Demand, and A is Average Demand

a) True

b) false

Ans:- (a)

Q5. Consider the peak computing demand for an organization is 110 units. The demand as a function of time can be expressed as D(t) = 3t, 0<= t <100 The resource provisioned by the cloud to satisfy current demand at time t is given as R(t) = D(t) + δ. [dD(t)/dt]

where δ is the delay in provisioning the extra computing recourse on demand

The cost to provision unit cloud resource for unit time is 0.8 units.
[Assume the delay in provisioning is 4 time units and minimum demand is 0.
(Penalty: Either pay for unused resource or missing service delivery]

Penalty is

a) 1100 units

b) 1200 units

c) 1300 units

d) None of these

Ans:- b) 1200 units

Q6. Which scenario Demands highest bandwidth for data transfer between nodes in Hadoop?

a) Different nodes on the same rack

b) Nodes on different racks in the same data center.

c) Nodes in different data centers

d) Data on the same node

Ans:- c) Nodes in different data centers

Q7. When load decreases, VM management can be done by

a) Shutdown unused nodes

b) Live migrate VMs to more utilized nodes

c) None of these

Q8. In a SLA negotiation, provider agreed with the service availability X%. Consumer runs the application for 15hours/day. At the end of one month [31 days], it was found that total service outage is 10 hrs. However, SLA negotiation (in terms of service availability) is honored.

a) X is atleast 97.8

b) X is atmost 97.8

c) X is exactly 99

d) Insufficient information

Ans:- b) X is atmost 97.8

Q9. A third party application runs in the cloud for 15 hours/day. At the end of one month [30 days], it was found that the cloud service suffered 7 outages of durations: 1 hour 30 minutes, 30 minutes, 1 hour 15 minutes, 45 minutes, 2 hours, 1 hour, and H hours, each on different days over the service period. Suppose a cloud guarantees service availability for 97% of time. What will be the possible value(s) of H that SLA negotiation gets honored in terms of service availability?

a) 8 hours

b) 6 hours

c) 3 hours

d) 9 hours

Ans:- b) 6 hours

Q10. If demand is exponential (D(t)=et), any fixed provisioning interval (tp) according to the current demands will fall behind.

a) linearly

b) exponentially

c) None of these