This set of MCQ(multiple choice questions) focuses on the Introduction To Internet Of Things Week 9 Solutions.
Course layout (All week answers link)
Week 0
Week 1: Introduction to IoT
Week 2: Basics of Networking
Week 3: Communication Protocols
Week 4: Sensor Networks
Week 5: Interoperability in IoT
Week 6: Introduction to Python programming
Week 7: Implementation of IoT with Raspberry Pi (contd), Introduction to SDN, SDN for IoT
Week 8: SDN for IoT (contd), Data Handling and Analytics, Cloud Computing
Week 9: Cloud Computing(contd), Sensor-Cloud
Week 10: Fog Computing, Smart Cities and Smart Homes
Week 11: Connected Vehicles, Smart Grid, Industrial IoT
Week 12: Industrial IoT (contd), Case Study: Agriculture, Healthcare, Activity Monitoring
NOTE: You can check your answer immediately by clicking show answer button. Moreover, this set of “Introduction To Internet Of Things Week 9 Solutions” contains 15 questions.
Now, start attempting the quiz.
Introduction To Internet Of Things Week 9 Solutions
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) T = Tf + Tc
c) T = 2(Tf + Tc) + Tfp + Tcp
d) T = 4(Tf + Tc + Tfp + Tcp)
Answer: a) T = 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: a) System View
Introduction To Internet Of Things Week 9 Solutions
Q1. The OpenStack cloud simulation framework provides an interactive Graphical User Interface (GUI)
a) True
b) False
Answer: a) True
Q2. Virtualized resources within the OpenStack simulator that you can define, set parameters of and deploy within OpenStack are also known as
a) Instances
b) Files
c) Hypervisors
d) Sketches
Answer: a) Instances
Q3. If you want to connect your OpenStack instance with the external public network (like the Internet), you would need to connect the following between your instance and the public network
a) Database
b) File
c) Memory
d) Router
Answer: d) Router
Q4. Which among the following is NOT a part of a sensor node connected to a wireless sensor network.
a) Sensing unit
b) Gaming unit
c) Processing unit
d) Communication unit
Answer: b) Gaming unit
Q5. Consider that you have two types of sensors, soil monitoring sensor for smart farming and temperature sensor for smart industry. The concept that the correct (right) type of sensor must be deployed only at their correct and appropriate physical location suitable as per their functionalities is known as
a) Right way of deployment
b) Right place of deployment
c) Right time of deployment
d) None of these
Answer: b) Right place of deployment
Q6. Sensor-as-a-Service (Se-aaS) is an exciting new concept that brings the service models of cloud computing to traditional IoT sensor networks. In this aspect, which among the following forms an essential component of a Se-aaS architecture.
a) Sensor marketing
b) Sensor division
c) Sensor virtualization
d) Sensor manufacturing
Answer: c) Sensor virtualization
Q7. Considering the end-to-end architecture of a WSN, from the physical sensor nodes right up to the users, sensor-cloud supports different entities to have ownership of the different layers and components simultaneously.
a) True
b) False
Answer: a) True
Q8. In sensor cloud architecture the Sensor Cloud Service Provider (SCSP) is logically situated at the following position of the architecture.
a) In the same level as the physical sensors
b) In between the physical sensors and the user layer
c) In the same level as the users
d) None of these
Answer: b) In between the physical sensors and the user layer
Q9. In sensor cloud, the association between virtual sensor instances and the corresponding physical sensors follows
a) one to one mapping
b) one to many mapping
c) many to one mapping
d) many to many mapping
Answer: d) many to many mapping
Q10. Dynamic caching mechanism improves the flexibility and efficiency of sensor cloud.
a) True
b) False
Answer: a) True
Q11. With respect to the caching based architecture of a sensor cloud, the External Cache(EC) has a direct data connection with which among the following
a) The Internal Cache (IC)
b) The user applications
c) Physical sensors
d) Both physical sensors and Internal Cache (IC)
Answer: d) Both physical sensors and Internal Cache (IC)
Q12. Data from an IoT device is transferred …… What is the value of x?
a) 10s
b) 5s
c) 15s
d) 20s
Answer: b) 5s
Q13. There are two types of sensor data, A and B. A is time sensitive that is required to be processed immediately, while B is not time sensitive and can tolerate longer time for processing. As per the standard utilities of cloud and fog computing, which among the following options show the correct processing locations for A and B.
a) A: Cloud, B: Fog
b) A: Fog, B: Cloud
c) None of these
d) Both of these
Answer: b) A: Fog, B: Cloud
Q14. There can be multiple fog nodes in between the physical sensor layer at the bottom and the cloud layer at the top.
a) True
b) False
Answer: a) True
Q15. Which among the following is/are a potential problem and challenge in fog computing?
a) Power consumption
b) Data security
c) Reliability
d) All of these
Answer: d) All of these
Previous Course – Introduction To Internet Of Things Week 9 Solutions
Q1. OpenStack is proprietary and a closed source software that you have to pay and buy.
a) True
b) False
Answer: b) False
Q2. In OpenStack which of the following component takes care of user authentication?
a) Nova
b) Horizon
c) Keystone
d) None of these
Answer: c) Keystone
Q3. You cannot ping your OpenStack instance from an outside network unless you connect your instance with the public network through a ____________
a) Router
b) Firewall
c) Repeater
d) Load balancer
Answer: a) Router
Q4. What is the primary service model for a sensor cloud?
a) Hardware-as-a-Service
b) Platform-as-a-Service
c) Data-as-a-Service
d) Sensor-as-a-Service
Answer: d) Sensor-as-a-Service
Q5. You can run two logical computers, one Linux machine and one Windows machine on top of the same physical hardware through the use of ________________.
a) Sharing
b) Scaling
c) Virtualization
d) Inheritance
Answer: c) Virtualization
Q6. In Sensor Cloud, one physical sensor can be abstracted as multiple virtual sensors.
a) True
b) False
Answer: a) True
Q7. In a Sensor cloud framework, the end-users have to continuously worry about owning and managing the physical sensor devices.
a) True
b) False
Answer: b) False
Q8. Virtual sensors within a sensor cloud have communication interfaces with _______________.
a) Only the physical sensors below them
b) Only the end-user applications above them.
c) Both physical sensors below and applications above.
d) Neither the physical sensors, nor the applications above.
Answer: c) Both physical sensors below and applications above.
Q9. Which of the following is true?
a) Traditional WSN: Virtualization support, Sensor Cloud: Virtualization support
b) Traditional WSN: No virtualization, Sensor Cloud: Virtualization Support
c) Traditional WSN: Virtualization support, Sensor Cloud: No Virtualization
d) Traditional WSN: No virtualization, Sensor Cloud: No Virtualization
Answer: b) Traditional WSN: No virtualization, Sensor Cloud: Virtualization Support
Q10. An organization ABC wishes to have environmental monitoring parameters of a particular region, but does not have the resources to deploy its own physical sensors. However, another organization B has some physical sensors that monitor the environment deployed in that region. Can sensor cloud help in achieving A’s objectives?
a) Yes
b) No
Answer: a) Yes
Q11. Referring back to Question 10 (above) and based on your answer, determine the roles that organization A and B play in the given scenario.
a) A: Sensor owner, B: End-user (service consumer)
b) A: End-User (service consumer), B: Sensor owner
c) Both A and B are sensor owners
d) Both A and B are end-users
Answer: b) A: End-User (service consumer), B: Sensor owner
Q12. Which among the following is a limitation of cloud computing?
a) On-demand services
b) Virtualization orchestration
c) Large amount of computing and storage resources.
d) Additional communication latency for critical applications
Answer: d) Additional communication latency for critical applications
Q13. In Fog computing, the Fog layer acts as an intermediary between the data source and the cloud for immediate processing of time critical data.
a) True
b) False
Answer: a) True
Q14. Suppose the one-way communication latency from a device to a Fog layer is 20 ms and that from the device to the cloud layer is 50ms. Data processing time at Fog is 10ms and that at Cloud is 5 ms, after which (i.e completion of data processing) a reply is sent back to the device by the Fog or Cloud. What is the difference between total communication latency (two-way round-trip communication plus processing time at Fog/Cloud) between the device and the Cloud and Fog respectively?
a) 50ms
b) 60ms
c) 55ms
d) 100ms
Answer: c) 55ms
Q15. Which among the following is true?
a) Fog computing acts as a complement to cloud computing.
b) Fog computing is a replacement for cloud computing.
c) Fog computing and cloud computing are the same.
d) Fog computing is more powerful than cloud computing (with respect to resources).
Answer: a) Fog computing acts as a complement to cloud computing.
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