(i) Definition of "mobile computing”
Mobile Computing is a variety of wireless devices that has the mobility to allow people to
connect to the internet, providing wireless transmission to access data and information from
where ever location they may be.
Mobile computing has three aspects: mobile communication, mobile hardware, and mobile
software. The first aspect addresses communication issues in ad-hoc and infrastructure networks
as well as communication properties, protocols, data formats and concrete technologies. The
second aspect is on the hardware, e.g., mobile devices or device components. The third aspect
deals with the characteristics and requirements of mobile applications.
(ii) Limitations of mobile computing devices
Insufficient bandwidth
Mobile Internet access is generally slower than direct cable connections, using technologies such
as GPRS and EDGE, and more recently PISDPA and HSUPA 3G networks. These networks are
usually available within range of commercial cell phone towers. Higher speed wireless LANs are
inexpensive but have very limited range.
Security standards
When working mobile, one is dependent on public networks, requiring careful use of VPN.
Security is a major concern while concerning the mobile computing standards on the fleet. One
can easily attack the VPN through a huge number of networks interconnected through the line.
Power consumption
When a power outlet or portable generator is not available, mobile computers must rely entirely
on battery power. Combined with the compact size of many mobile devices, this often means
unusually expensive batteries must be used to obtain the necessary battery life.
Transmission interferences
Weather, terrain, and the range from the nearest signal point can all interfere with signal
reception. Reception in tunnels, some buildings, and rural areas is often poor.
Potential health hazards
People who use mobile devices while driving are often distracted from driving are thus assumed
more likely to be involved in traffic accidents. (While this may seem obvious, there is
considerable discussion about whether banning mobile device use while driving reduces accidents or not. Cell phones may interfere with sensitive medical devices. There are allegations
that cell phone signals may cause health problems.
Human interface with device
Screens and keyboards tend to be small, which may make them hard to use. Alternate input
methods such as speech or handwriting recognition require training.
Kavungya answered the question on May 14, 2019 at 08:37
- Analyse the following modes of communication with reference to-cost, speed of transmission
and reliability:
(i) Serial mode.
(ii) Parallel mode.(Solved)
Analyse the following modes of communication with reference to-cost, speed of transmission
and reliability:
(i) Serial mode.
(ii) Parallel mode.
Date posted: May 14, 2019. Answers (1)
- Information systems controls consist of all methods, policies and organizational procedures that
ensure the safety of the organization’s assets, the accuracy and reliability of its accounting
records...(Solved)
Information systems controls consist of all methods, policies and organizational procedures that
ensure the safety of the organization’s assets, the accuracy and reliability of its accounting
records and operational adherence to management standards.
Required:
Describe five types of general information systems controls.
Date posted: May 14, 2019. Answers (1)
- Differentiate between information systems (IS) and information technology (IT).(Solved)
Differentiate between information systems (IS) and information technology (IT).
Date posted: May 14, 2019. Answers (1)
- a) Identify the procedures that could be adopted to control the spread of computer viruses in
an organisation.
b) Name six threats to an organization’s information system...(Solved)
a) Identify the procedures that could be adopted to control the spread of computer viruses in
an organisation.
b) Name six threats to an organization’s information system that could arise as a result of
computer crime.
Date posted: May 14, 2019. Answers (1)
- Identify three vital services which information systems can provide to a business organization.(Solved)
Identify three vital services which information systems can provide to a business organization.
Date posted: May 14, 2019. Answers (1)
- a) Identify three roles of- information systems in-an. organisation.
b) State and explain the components of an information system.(Solved)
a) Identify three roles of- information systems in-an. organisation.
b) State and explain the components of an information system.
Date posted: May 14, 2019. Answers (1)
- Organizations individual use different types of information systems for different purposes.
Describe the characteristics of the following information systems:
i) Transaction processing systems (TPS).
ii) Sales and marketing...(Solved)
Organizations individual use different types of information systems for different purposes.
Describe the characteristics of the following information systems:
i) Transaction processing systems (TPS).
ii) Sales and marketing systems.
Date posted: May 14, 2019. Answers (1)
- a) i) Define the term "information systems
ii) State five types of information systems
b) As the information system manager of a company whose operations are highly...(Solved)
a) i) Define the term "information systems
ii) State five types of information systems
b) As the information system manager of a company whose operations are highly automated,
you have noticed that a large number of employees are suffering from occupational over-use
syndrome otherwise known as repetitive strain injury (RSI)
Identify four measures that you could adopt in order to minimize occupational over-use
syndrome
Date posted: May 14, 2019. Answers (1)
- Explain four security concerns that personal computer users face in an organization.(Solved)
Explain four security concerns that personal computer users face in an organization.
Date posted: May 14, 2019. Answers (1)
- Small and micro-business enterprises have greater access to a variety of information technology
tools that improve productivity such as netbooks, smartphones and cloud computing-based services. However,...(Solved)
Small and micro-business enterprises have greater access to a variety of information technology
tools that improve productivity such as netbooks, smartphones and cloud computing-based services. However, without adequate end point security practices in place, many enterprises
are exposed to both external and internal threats that could cripple their operations.
Identify the end point security threats to small and micro-business enterprises,
Date posted: May 14, 2019. Answers (1)
- a) To be considered an executive information system (EIS), a software product should address
certain needs of the executive.
b) Briefly describe four structural elements of a...(Solved)
a) To be considered an executive information system (EIS), a software product should address
certain needs of the executive.
b) Briefly describe four structural elements of a computer system.
Date posted: May 14, 2019. Answers (1)
- For each of the following threats to information systems, security, identify two conditions that
might increase the vulnerability of the information systems security:
i. Operator error.
ii. Hardware...(Solved)
For each of the following threats to information systems, security, identify two conditions that
might increase the vulnerability of the information systems security:
i. Operator error.
ii. Hardware malfunction,
iii. Software bugs.
iv. Data errors.
v. Accidental disclosure of information.
vi. Theft.
vii. Vandalism and sabotage.
Date posted: May 14, 2019. Answers (1)
- (i) Define the term "knowledge management system".
(ii) Highlight four benefits of a knowledge management system to a business organisation,
(iii) Outline three major problems a company...(Solved)
(i) Define the term "knowledge management system".
(ii) Highlight four benefits of a knowledge management system to a business organisation,
(iii) Outline three major problems a company might face when implementing a new
knowledge management system
Date posted: May 14, 2019. Answers (1)
- Briefly explain the following terms:
i. Uniform Resource Locator.
ii. Cloud computing.(Solved)
Briefly explain the following terms:
i. Uniform Resource Locator.
ii. Cloud computing.
Date posted: May 14, 2019. Answers (1)
- a) Outline three functions of an organisation that could be automated.
b) Briefly, describe how a computer system could be modified for use by physically challenged
persons(Solved)
a) Outline three functions of an organisation that could be automated.
b) Briefly, describe how a computer system could be modified for use by physically challenged
persons
Date posted: May 14, 2019. Answers (1)
- Briefly explain four authentication techniques that could enhance security of information
systems in an organisation.(Solved)
Briefly explain four authentication techniques that could enhance security of information
systems in an organisation.
Date posted: May 14, 2019. Answers (1)
- (i) Define the term "management information systems" in the context of information systems.
(ii) Explain three advantages of management information systems to the banking sector.(Solved)
(i) Define the term "management information systems" in the context of information systems.
(ii) Explain three advantages of management information systems to the banking sector.
Date posted: May 14, 2019. Answers (1)
- a) (i) Highlight four benefits of office automation systems.
(ii) Explain four characteristics of information that is suitable for decision making.
b) Briefly explain four applications of...(Solved)
a) (i) Highlight four benefits of office automation systems.
(ii) Explain four characteristics of information that is suitable for decision making.
b) Briefly explain four applications of cloud computing.
Date posted: May 14, 2019. Answers (1)
- Discuss the evolution of information systems.(Solved)
Discuss the evolution of information systems.
Date posted: May 14, 2019. Answers (1)
- Distinguish between the following terms:
(i) Data security and systems security.(Solved)
Distinguish between the following terms:
(i) Data security and systems security.
Date posted: May 14, 2019. Answers (1)