An information system is the resources that enable the collection, management, control, and dissemination of data/information throughout a company. The database is a fundamental component of an information system. The lifecycle of an information system is inherently linked to the lifecycle of the database that supports it.
Typically, the stages of the information systems lifecycle include: planning, requirements collection and analysis, design (including database design), prototyping, implementation, testing, conversion, and operational maintenance. As a database is a fundamental component of the larger company-wide information system, the database system development lifecycle is inherently linked with the information systems lifecycle.
kevowmuchiri answered the question on July 4, 2018 at 16:00
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Define the two principal integrity rules for the relational model. Discuss why it is desirable to enforce these rules.
(Solved)
Define the two principal integrity rules for the relational model. Discuss why it is desirable to enforce these rules.
Date posted:
July 4, 2018
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Answers (1)
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Describe the functions that should be provided by a modern full-scale multi-user DBMS.
(Solved)
Describe the functions that should be provided by a modern full-scale multi-user DBMS.
Date posted:
July 4, 2018
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Answers (1)
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Describe the problems with the traditional two-tier client-server architecture and discuss how these problems were overcome with the three-tier client-server architecture.
(Solved)
Describe the problems with the traditional two-tier client-server architecture and discuss how these problems were overcome with the three-tier client-server architecture.
Date posted:
July 4, 2018
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Answers (1)
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Describe the five components of the DBMS environment and discuss how they relate to each other
(Solved)
Describe the five components of the DBMS environment and discuss how they relate to each other
Date posted:
July 4, 2018
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Explain how an interactive DVD can be used to train users of an information system
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Explain how an interactive DVD can be used to train users of an information system
Date posted:
July 3, 2018
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Answers (1)
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Create a function called reverse() that takes two parameters. The first parameter called str, is a pointer to a string that will be reversed upon...
(Solved)
Create a function called reverse() that takes two parameters. The first parameter called str, is a pointer to a string that will be reversed upon return from the function. The second parameter is called count, and it specifies how many characters of str to reverse(). Give count a default value that, when present, tells reverse() to reverse the entire string.(use C++ language)
Date posted:
June 8, 2018
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Answers (1)
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Explain the factors determining the methods of data processing
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Explain the factors determining the methods of data processing
Date posted:
June 7, 2018
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Answers (1)
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What are the disadvantages of computers
(Solved)
What are the disadvantages of computers
Date posted:
June 7, 2018
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Answers (1)
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The two primary objectives of Operating System
(Solved)
The two primary objectives of Operating System use
Date posted:
June 6, 2018
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Answers (1)
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Explain two roles of a computer driver
(Solved)
Explain two roles of a computer driver.
Date posted:
June 4, 2018
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Answers (1)
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List three categories of operating systems
(Solved)
List three categories of operating systems.
Date posted:
May 26, 2018
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Answers (1)
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Define the following terms as used in computer programming: (a.) A compiler (b.) A debugger (c.) An algorithm
(Solved)
Define the following terms as used in computer programming: (a.) A compiler (b.) A debugger (c.) An algorithm
Date posted:
May 26, 2018
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Answers (1)
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Create a C++ class called stopwatch that emulates a stopwatch that keeps track of elapse time. Use a constructor to initially set the elapse time...
(Solved)
Create a C++ class called stopwatch that emulates a stopwatch that keeps track of elapse time. Use a constructor to initially set the elapse time to 0.Provide two member function called start() and stop() that turns on and off the timer, respectively. Include a member function called show() that displays the elapsed time.Also, have the destructor function automatically display elapsed when stopwatch object is destroyed.
Date posted:
May 5, 2018
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Answers (1)
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How does computer technology threaten the privacy of our data?
(Solved)
How does computer technology threaten the privacy of our data?
Date posted:
April 28, 2018
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Answers (1)
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1.(i) Define WIMP
(ii) Explain the elements of WIMP (windows, icons, menus, pointer)
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1.(i) Define WIMP
(ii) Explain the elements of WIMP (windows, icons, menus, pointer)
Date posted:
April 24, 2018
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Answers (1)
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Explain the meaning of information and communication technology (ICT)
(Solved)
Explain the meaning of information and communication technology (ICT).
Date posted:
April 19, 2018
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Answers (1)
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Differentiate between a macro and a module as used in computer applications.
(Solved)
Differentiate between a macro and a module as used in computer applications.
Date posted:
April 3, 2018
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Answers (1)
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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
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Answers (1)
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(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
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Answers (1)
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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
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Answers (1)