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Cache memory
This refers to a high-speed memory that a processor can access more quickly than
RAM. Frequently used instructions are stored in cache since they can be retrieved more quickly improving the overall performance of the computer. Level 1 (L1) cache is located on the processor; Level 2 (L2) is located between the processor and RAM. Cache memory is very expensive and thus the size of this memory in the computer relative to the primary and secondary memory is very small.
b) Coprocessor
This refers to an additional processor that is used to perform specialized activities within the system. The coprocessor within a system is able to ensure that the coprocessor is more efficient in undertaking certain activities. An example of a coprocessor is a math coprocessor. The math coprocessor helps the main processor to perform mathematical computations.
c) Device driver
This refers to a program that allows a specific device such as a modem, network adapter, or printer, to communicate with the operating system. Device drivers are specific to the make and model of the device. They are supplied in compact disks or diskettes together with the devices they represent when the devices are sold to the customer.
d) Disk caching
This refers to a technique that is used to improve the access time (time that is takes to access data) for a hard disk. Disk caching utilizes a disk cache which may be part of the hard disk or a specified portion of Random Access Memory (RAM). The disk cache holds data that has been recently read and, in some cases, adjacent areas that are likely to be accessed next.
e) Expansion board
This refers to an electronic circuit that enables a user to add to the features of a computer system. In order to add a feature to a computer system, the required electronic board is plugged into the motherboard (main electronic circuit board in the computer system) by making use of expansion slots (sockets within the motherboard). Expansion boards may be used to increase computer memory and also, to improve the visual capability of a system, to add an audio capability to the system, to increase disk space of the system, etc.
Gregorymasila1 answered the question on March 28, 2018 at 14:34
- (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)
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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)
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Distinguish between adaptive and probabilistic systems.
Date posted: March 24, 2018. Answers (1)
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Explain the term environment as used in information systems.
Date posted: March 24, 2018. Answers (1)
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What are the physical parts of a computer?
Date posted: March 23, 2018. Answers (1)
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Date posted: March 19, 2018. Answers (1)
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Write a program that solves a quadratic equation gives the answer for the roots.
Date posted: March 8, 2018. Answers (1)
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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)
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Date posted: March 5, 2018. Answers (1)
- What is a Knowledge Based System?(Solved)
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Date posted: March 3, 2018. Answers (1)