Hello, dear friend, you can consult us at any time if you have any questions, add WeChat: daixieit

MODEL EXAMINATION

Semester 2 - Main, 2022

COMP5216 Mobile Computing

NOTE: In this model exam paper, we have included only 4 questions, just to provide you some preparation. But in your exam, you will have to answer 5 questions. Also, these model exam questions will not appear in your final exam.

Question 1

1.1 List an advantage of using Network Location instead of GPS location and provide an example use case for the given advantage. [4 marks]

1.2 Many users have regular device charging patterns that can be easily captured with modern machine learning capabilities. If your app is able to predict the     next charging time, explain two strategies that use this knowledge to reduce  the energy consumption of your app. [4 marks]

1.3 Explain a technique that can be used to implement the following functionalities in an Android app. If the proposed technique involves collecting data from a    sensor or leveraging an API, those should be explicitly specified.

1.3.1 Dim the screen when a user put the phone inside a pocket or a handbag. [2 marks]

1.3.2 Count the number steps a person has climbed during the day. [2 marks]

Question 2

You have been asked to design an app that collects Motion Sensor and Body      Sensor data from a smartphone and upload to a cloud service for fitness              analytics. The app should start automatically across reboots or any user actions. Data is collected in a sample rate of few seconds. Note: This is a design question only. You don’t have to write code for this.

2.1 Describe technical approach that you plan to follow including the basic        components of Android you need to develop this app (You may use a block diagram to explain your design). [6 marks]

2.2 If the data upload process is not real time, describe two methods you can use to reduce resource usage (e.g. bandwidth and energy). [4 marks]

2.3 If the data upload requirement is real time describe, describe two methods you can use to reduce resource usage (e.g. bandwidth and energy) ? [4 marks]

Additional questions you can try.

Due to recent COVID-19 pandemic, many industries moved to working from          home arrangements. This has introduced challenges in terms of providing secure remote access and also monitoring remote workers. Many companies have opted using VPN (virtual private network) solutions to let employees access company    resources remotely. However,  verifying the person behind the remote computer   connected to the VPN is still a challenge. In fact, the company information is more vulnerable when remote computers are connected via VPNs. For example, family members of the employee may accidently access company information as many  households share computers. In some cases, work can be outsourced without the knowledge of the company.

You have been asked to develop a mobile app that can monitor remote workers. In particular, making sure that the person behind the computer is really the         employee of the company.

4.1 Describe a strategy that you plan to develop to continuously monitor           (authenticate) the employee during the work hours. The answer should contain steps that the employee should follow (e.g. workflow of the app). Note: The      proposed strategy should be non-invasive or should be minimally interfere with the work. [8 marks]

4.2 Explain two strategies or mechanisms that you can develop to ensure user/employee privacy in developing this particular app? [4 marks]

4.3 Explain a strategy that you can develop to minimise energy consumption of   the proposed app. Note: The strategy should address one of the most power       consuming actions of the proposed app and the answer should be clearly liked to the proposed app. [4 marks]

4.4 Explain an application specific risks or threats for the success of your solution. Provide a mitigation strategy for the identified risk or threat. [4 marks]