3

Question 1

Which of the following statement(s) regarding OpenStack storage is/are right?

Answer 1

B. Both ephemeral storage and block storage are accessible from within VM
D. Ephemeral storage is used to run operating system and/or scratch space

Question 2

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?

Answer 2

B. M = T/(Eff P)

Question 3

What does the term “biasness towards vendors” imply in the context of SLA monitoring

Answer 3

A. Vendor-driven selection of monitoring parameters

Question 4

How does the master node in the Google File System maintain communication with chunk servers?

Answer 4

Heartbeat messages

Question 5

In a cloud, total service uptime is 175 minutes and availability of the service is 0.85. What is the
service downtime?

Answer 5

26.25 minutes

Question 6

Statement 1: In ephemeral storage, the stored objects persist until the VM is terminated.
Statement 2: The ephemeral storage is managed by Cinder in OpenStack.

Answer 6

Statement 1 is TRUE, Statement 2 is FALSE

Question 7

“Midsize providers can achieve similar statistical economies to an infinitely large provider” Does
this fall under?

Answer 7

Independent demand

Question 8

Let D(t) and R(t) be the instantaneous demand and resources at time t respectively. If demand is
exponential (D(t)=et
), any fixed provisioning interval (tp) according to the current demands will fall
linearly behind.

Answer 8

FALSE

Question 9

Which of the following is/are expected common SLA parameter(s) for both Software-as-a-Service
and Storage-as-a-Service models?

Answer 9

scalability

Question 10

Data retention and deletion by cloud providers do not fall under one of the SLA requirements.

Answer 10

True