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is a key in a relational database that is unique for each record.
jim items answered the question on April 3, 2018 at 10:57
- What is relational database?
(Solved)
What is relational database?
Date posted: April 3, 2018. Answers (1)
- What is the extension of Access database file?(Solved)
What is the extension of Access database file?
Date posted: April 3, 2018. Answers (1)
- What is MS-Access?
(Solved)
What is MS-Access?
Date posted: April 3, 2018. Answers (1)
- List at least five database applications.
(Solved)
List at least five database applications.
Date posted: April 3, 2018. Answers (1)
- What is Database Management System (DBMS)?(Solved)
What is Database Management System (DBMS)?
Date posted: April 3, 2018. Answers (1)
- Write a SQL statement to create a simple table countries including columns country_id,country_name and region_id?(Solved)
Write a SQL statement to create a simple table countries including columns country_id,country_name and region_id?
Date posted: April 3, 2018. Answers (1)
- Explain the disadvantages of digitizers in transferring of spatial data to GIS.(Solved)
Explain the disadvantages of digitizers in transferring of spatial data to GIS.
Date posted: March 29, 2018. Answers (1)
- The fastest growing area of computing is end-user computing especially the area of end-user application development which is based on the fourth generation languages (4GLs)....(Solved)
The fastest growing area of computing is end-user computing especially the area of end-user application development which is based on the fourth generation languages (4GLs).
Required:
(i.) Describe five major features of a fourth generation language.
(ii.) Discuss the advantages to an organization in having users involved in developing information systems applications.
Date posted: March 28, 2018. Answers (1)
- (a) Explain the meaning of the term protocol in computer networks. (3 marks) (b)...(Solved)
(a) Explain the meaning of the term protocol in computer networks. (3 marks) (b) Describe the use of the following devices in computer networks: (i.) Multiplexors;
(ii.) Acoustic couplers; (iii.) Line concentrators;
(c) (i.) Explain how Integrated Systems Digital Network (ISDN) may be used in a business organization?
(ii.) Describe the type of computer network you would recommend for a large, country wide, commercial bank, with heavy data processing requirements at its four regional centers.
Date posted: March 28, 2018. Answers (1)
- (a) Explain the following categories of systems in connection with management decision making, clearly distinguishing between the categories: (i.) Transaction processing systems; ...(Solved)
(a) Explain the following categories of systems in connection with management decision making, clearly distinguishing between the categories:
(i.) Transaction processing systems;
(ii.) Management Information Systems;
(iii.) Decision Support Systems;
(iv.) Executive Support Systems;
(b) Identify and briefly explain the three fundamental components of an expert system. Explain how an expert system may be used in a business application.
Date posted: March 28, 2018. Answers (1)
- Boni Wholesalers Ltd. Provides a variety if goods to customers in Nairobi. The wholesale business is owned and managed by Mr. Boniface Ndambuki. Mr....(Solved)
Boni Wholesalers Ltd. Provides a variety if goods to customers in Nairobi. The wholesale business is owned and managed by Mr. Boniface Ndambuki. Mr. Boni purchases goods on credit from his well established suppliers. He has a large box-file containing supplier details and another equally large one containing commodity details. The commodity file also indicates the levels of inventory held in the store.
When a customer makes his order, the sales office accesses the commodity file to check if there is sufficient stock of the required items. If there is sufficient stock, then the sales office prepares a delivery note which is forwarded to the accounts office where an invoice is prepared. The invoice and the delivery note accompany the goods from the store to the customer who prepares a payment cheque for Boni Wholesalers Ltd. A copy of the delivery note is filed in the commodity file which now shows that the stock has reduced by the amount delivered to the customer.
Sometimes the stock of the required item is not sufficient to service the customer order. In this case the supplier‟s file is accessed to select the supplier that Boni
Wholesalers Ltd. Will order from. The sales office then produces purchase orders and dispatches them to the selected supplier. The supplier prepares his own invoice and delivery note which accompany the ordered goods to the stores of Boni Wholesalers Ltd. Once received, the invoice is forwarded to the accounts office for payment to the supplier. The delivery note is used to update the commodity as well as the supplier details files.
Required: a) In what ways can a business organization be considered as a system? Derive illustrations from Boni Wholesalers.
Date posted: March 28, 2018. Answers (1)
- 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)
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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)