Get premium membership and access questions with answers, video lessons as well as revision papers.
a) A system is a set of interacting components that work together to accomplish specific goals. Systems may be identified from specific characteristics. The main systems characteristics include:
o Purpose
o Rationale o Efficiency o Effectiveness o Inputs o Outputs o Transformation roles o Feedback o Throughput o Boundary o Environment
o Interfaces
Therefore a business organization may be considered as a system because it exhibits the characteristics of a system. With reference to Boni Wholesalers, these are:
1. Purpose
Boni Wholesalers? purpose is to buy goods from suppliers and sell them in bulk to customers. This is facilitated through its sales office and accounts office.
2. Rationale
The justification for the existence of Boni Wholesalers is the need to make profit.
3. Input
Boni Wholesalers has supplier delivery notes, supplier invoices and payments from customers as inputs.
4. Environment
Boni Wholesalers exists in a business environment containing other business systems such as the suppliers and also individual entities such as customers. Nairobi is the business environment for Boni Wholesalers.
5. Interfaces
Boni Wholesalers has a meeting point with the suppliers system where inputs and outputs are shared. It also has a meeting point with the customers where inputs and outputs are shared.
6. Transformation rules
Boni Wholesalers has well defined rules that specify how the input is processed to produce output. For instance, a customer order is passed onto the sales office which verifies if there is sufficient stock before preparing a delivery note which is forwarded to the accounts office where an invoice is prepared which accompanies the goods from the store together with the delivery note to the customer who then prepares a cheque for Boni Wholesalers Ltd.
7. Boundary
Boni Wholesalers has a boundary that is its organizational boundary (geographical boundary).
Gregorymasila1 answered the question on March 28, 2018 at 14:36
- Explain each of the following micro computer hardware/software devices:
(a) Cache memory; ...(Solved)
Explain each of the following micro computer hardware/software devices:
(a) Cache memory;
(b) Coprocessor;
(c) Device driver;
(d) Disk caching;
(e) Expansion card;
Date posted: March 28, 2018. Answers (1)
- (a) Information is a vital resource and most organizations are investing heavily in its management. It is therefore critical to protect data and information from...(Solved)
(a) Information is a vital resource and most organizations are investing heavily in its management. It is therefore critical to protect data and information from accidental or deliberate unauthorized modification or destruction. The information system itself must be protected from unauthorized interference so that it continues to meet its objective of continuing to provide information to various users. Required: (i.) Make two recommendations on physical security measures your organization‟s information system (2 marks) (ii.) Explain how “Backup” and “Uninterruptible Power Supply” are security measures. (2 marks)
(iii.) Discuss two security features that most operating systems have. (2 marks) (iv.) Name two disasters that information systems should be guarded against. (2 marks) (v.) Why do you think an information security policy is necessary for your organization? (2 marks)
b) Computer viruses pose a danger to the integrity of micro-computer systems. Fortunately a variety of anti-virus tools are available to detect, identify and remove viruses using a wide range of techniques. Required:
(i.) What is a computer virus?
(ii.) Name two anti-virus tools.
(iii.) Suggest two administrative measures that your organization should take to check the threats of computer viruses.
(iv.) Name two environmental factors that should be controlled so that they do not affect the operation of the computer.
Date posted: March 28, 2018. Answers (1)
-
a) List five types of systems
b) Explain the following characteristics of a system:
(i.) Differentiation;
(ii.) Equifinality;
(iii.) Feedback;
(iv.) Transformation;
(v.) Entropy;
(Solved)
a) List five types of systems
b) Explain the following characteristics of a system:
(i.) Differentiation;
(ii.) Equifinality;
(iii.) Feedback;
(iv.) Transformation;
(v.) Entropy;
Date posted: March 28, 2018. Answers (1)
- (a) (i.) What is a Decision Support System (DSS)?
(ii.) Describe the major DSS software components.
(b) (i.) What is...(Solved)
(a) (i.) What is a Decision Support System (DSS)?
(ii.) Describe the major DSS software components.
(b) (i.) What is an expert system?
(ii.) List four advantages of using an Expert System in decision making.
Date posted: March 28, 2018. Answers (1)
- In data communication, the communication channel is the route along which data is transmitted. The transmission of data can be described by the following four...(Solved)
In data communication, the communication channel is the route along which data is transmitted. The transmission of data can be described by the following four characteristics:
A. Direction of flow of data.
B. Communication lines.
C. Speed of data transmission.
D. Mode of data transmission.
Required: For each of the following data communication concepts/devices, indicate under which ONE of the above listed characteristics A-D they would best fall: ii. Protocol; iii. Half duplex; iv. Fibre optics; v. Simplex; vi. Analog signal; vii. Micro wave; viii. Band width; ix. Start/stop bit; x. Voice bad.
Explain the term internetworking within the context of data communication. How does a call-back unit and data-encryption equipment enhance security in a computer network?
Date posted: March 28, 2018. Answers (1)
- Masaku Engineering Co. Ltd, a company that is involved in the design and manufacturing of various products realizes that, in order to remain ahead of...(Solved)
Masaku Engineering Co. Ltd, a company that is involved in the design and manufacturing of various products realizes that, in order to remain ahead of its competitors, it must introduce Computer Aided Design (CAD) techniques.
Required:
a) Define what is meant by „Computer Assisted Design‟ techniques
b) List and describe briefly FOUR potential benefits, the company is likely to experience in the adoption of CAD
c) List five physical security procedures that Masaku might adopt to make sure that its information is secure.
Date posted: March 28, 2018. Answers (1)
- a) Before systems are put into organisational use, they should be well tested to ensure that the system being delivered is working as expected before...(Solved)
a) Before systems are put into organisational use, they should be well tested to ensure that the system being delivered is working as expected before it is implemented.
(i) What factors would determine the scope of system testing?
(ii) Who are involved in the testing process?
(iii) What do you consider to be limitations of software testing?
b) Decision support systems (DSS) are ISs that support managers in arriving at decisions in semi-structured problems. State any FOUR characteristics of DSS. Identify too the THREE main components of the DSS.
Date posted: March 28, 2018. Answers (1)
- a) Project management software can offer useful tool for managing projects. i) Identify the functions of project management software
ii) What are...(Solved)
a) Project management software can offer useful tool for managing projects. i) Identify the functions of project management software
ii) What are the typical inputs required for the software?
iii) Outline the major merits and demerits of using a project management software in the project management process
b) Outline the key steps in the systems acquisition process
Date posted: March 28, 2018. Answers (1)
- a) The systems implementation stage of SDLC involves getting the new system into use as smoothly and quickly as possible. Briefly explain the main activities...(Solved)
a) The systems implementation stage of SDLC involves getting the new system into use as smoothly and quickly as possible. Briefly explain the main activities in the implementation stage.
b) Fourth Generation Languages (4GLs) make rapid applications development faster for many programmers. What are 4GLs?
c) It has been suggested that for any business to derive strategic advantage from information systems there has to be alignment between the business strategy and the IS/IT strategy. Define what a business strategy for IT is and show why it is important for organisations to have an IS/ IT strategy.
Date posted: March 28, 2018. Answers (1)
- a) Explain the following tools for documenting and modelling user requirements
i) Entity-relationship diagrams (ERDs) ...(Solved)
a) Explain the following tools for documenting and modelling user requirements
i) Entity-relationship diagrams (ERDs) ii) Entity Life Histories
b) What are the desirable characteristics of a user-friendly system
c) Common computer outputs include printed reports and on screen reports. Explain the main classifications of reports.
Date posted: March 28, 2018. Answers (1)
- a) State the characteristics of a quality software product ...(Solved)
a) State the characteristics of a quality software product b) Explain the following terms as they relate to systems development: i) Quality management ii) Quality assurance
iii) Quality control
(2 marks)
c) In assessing the economic feasibility of MIS projects, it is important to identify the costs and benefits of New Systems. Identify Costs and benefits of new systems
Date posted: March 28, 2018. Answers (1)
- a) Define contingency planning and outline the contents of a contingency plan.
b) In ensuring control over the IS department resources, the company can...(Solved)
a) Define contingency planning and outline the contents of a contingency plan.
b) In ensuring control over the IS department resources, the company can adopt physical or logical access controls. With appropriate examples, explain the two forms of control. c) Define the following terms as they related to information systems.
i) Hackers
ii) Viruses
Date posted: March 28, 2018. Answers (1)
- Differentiate between static and dynamic testing as used in system analysis and design(Solved)
Differentiate between static and dynamic testing as used in system analysis and design.
Date posted: March 24, 2018. Answers (1)
- Distinguish between adaptive and probabilistic systems (Solved)
Distinguish between adaptive and probabilistic systems.
Date posted: March 24, 2018. Answers (1)
- Explain the term environment as used in information systems(Solved)
Explain the term environment as used in information systems.
Date posted: March 24, 2018. Answers (1)
- What are the physical parts of a computer?(Solved)
What are the physical parts of a computer?
Date posted: March 23, 2018. Answers (1)
- List any four likely causes of data and program loss in a computer system?(Solved)
List any four likely causes of data and program loss in a computer system?
Date posted: March 19, 2018. Answers (1)
- Write a program that solves a quadratic equation gives the answer for the roots.(Solved)
Write a program that solves a quadratic equation gives the answer for the roots.
Date posted: March 8, 2018. Answers (1)
- Write a C++ program that accepts an integer and checks whether it is even or odd and then prints an appropriate message(Solved)
Write a C++ program that accepts an integer and checks whether it is even or odd and then prints an appropriate message.
Date posted: March 8, 2018. Answers (1)
- Discuss process synchronization in the context of computer operating systems(Solved)
Discuss process synchronization in the context of computer operating systems
Date posted: March 5, 2018. Answers (1)