Week 9: Assignment 9

Q1. Which component of OpenStack do you use to access all the other components?
a. Horizon
b. Glance
c. Neutron
d. None of these

Answer: a. Horizon

Q2. Which among the following is NOT a component of OpenStack?
a. Horizon
b. Heat
c. Plasma
d. Neutron

Answer: c. Plasma

Q3. Sensor cloud is simply dumping and organizing of sensor data on cloud computing platforms.
a. True
b. False

Answer: b. False

Q4. Which among the following are limitations of traditional Wireless Sensor Networks (WSNs)?
a. Procurement Issues
b. Deployment Issues
c. Maintenance Issues
d. All of the given

Answer: d. All of the given

Q5. In a typical sensor cloud architecture, the sensor cloud infrastructure that provides the virtualization lies __________________
a. At the same layer as physical sensor devices
b. At the application layer
c. In between the physical sensor layer and the application layer
d. Sensor cloud does not support virtualization

Answer: c. In between the physical sensor layer and the application layer

Q6. Generally speaking, Sensor Cloud Service Providers (SCSPs) are also always the owners of the physical sensors
a. Yes
b. No

Answer: b. No

Q7. In a typical sensor cloud architecture with virtualization, one virtual sensor can be associated with how many physical sensors?
a. Only one
b. One or more than one
c. None
d. Only two

Answer: b. One or more than one

Q8. Sensor virtualization aims to achieve more _____________ in providing sensor based services
a. Complexity
b. Flexibility

Answer: b. Flexibility

Q9. Suppose that you want to start a business to provide some IoT based application, but you do not have the means to develop the application layer logic, neither you have the means to purchase and deploy physical sensors. You can however, rent cloud servers for use and write interface logic for interfacing with other modules. Which among the following actors will be the most suitable for you?
a. Physical sensor owner
b. Application layer developer
c. Sensor Cloud Service Provider (SCSP)
d. You cannot start the business

Answer: c. Sensor Cloud Service Provider (SCSP)

Q10. Which among the following is implemented along with sensor cloud to make its services and performance better?
a. Cashing
b. Caching
c. Casing
d. Calling

Answer: b. Caching

Q11. Which among the following cases is most likely to reduce the overall price of sensor-cloud implementation provided that the data traverses through multiple sensor hops starting from the origin sensor to the sink node, and provided that all owners are honest and charge for only what is required?
a. If physical sensors are owned by multiple owners with high profit margin
b. If all physical sensors are owned by a single owner with uniform profit margin

Answer: b. If all physical sensors are owned by a single owner with uniform profit margin

Q12. Fog computing is aimed to replace cloud computing completely and has no scope for integration with cloud
a. True
b. False

Answer: b. False

Q13. Suppose data from an IoT device first goes to Fog layer for some basic processing, after which it goes to Cloud layer for advanced processing, then the processed data comes back to the Fog layer and then, it finally comes back to the origin sensor node. In the return journey no processing of data takes place anywhere, just transfer of data takes place.

If ‘Tf’ is the time taken by the data to travel from sensor to fog and vice versa, and ‘Tc’ is the time taken by the data to travel from fog to cloud and vice versa, ‘Tfp’ is the data processing time at fog and ‘Tcp’ is the data processing time at cloud, what is the total round trip time ‘T’ taken by data starting from the origin sensor node, processing the data and then back to the sensor node after being processed.
a. T = Tf + Tc + Tfp + Tcp
b. b. T = Tf + Tc
c. T = 2(Tf + Tc) + Tfp + Tcp
d. T = 4(Tf + Tc + Tfp + Tcp)

Answer: c. T = 2(Tf + Tc) + Tfp + Tcp

Q14. Consider the standard Fog computing architecture. In which of the following layer will ‘very time sensitive data’ be processed?
a. Nearest fog node
b. Distant aggregate fog node
c. Cloud
d. Does not matter

Answer: a. Nearest fog node

Q15. “Network, Accelerator, Compute and Storage” constitute the part of which view of fog computing architecture, as defined by OpenFog Consortium Architecture Working Group?
a. System View
b. Node View
c. Software View
d. None of these

Answer: b. Node View