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What is the minimal normal form that a relation must satisfy? Provide a definition for this normal form.
Date posted:
July 9, 2018
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Describe the characteristics of a table that violates first normal form (1NF) and then describe how such a table is converted to 1NF.
Date posted:
July 9, 2018
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How does multiplicity represent both the cardinality and the participation constraints on a relationship?
Date posted:
July 7, 2018
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Divide 14 by 3 using restoring and non restoring division. Show all the steps. No partial credit will be awarded unless all steps are shown.
Date posted:
July 7, 2018
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Multiply the following pair of signed 2’s complement numbers using the Booth algorithm. Assume A is the multiplicand and B is the multiplier. Show all the steps. No partial credit will be awarded unless all steps are shown.
A = 010111, B = 110110
Date posted:
July 7, 2018
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Describe the characteristics of the data held in a data warehouse.
Date posted:
July 4, 2018
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Explain why it is necessary to select the target DBMS before beginning the physical database design phase.
Date posted:
July 4, 2018
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Discuss the relationship between the information systems lifecycle and the database system development lifecycle.
Date posted:
July 4, 2018
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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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Describe the functions that should be provided by a modern full-scale multi-user DBMS.
Date posted:
July 4, 2018
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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.
Date posted:
July 4, 2018
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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
Date posted:
July 3, 2018
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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 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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Explain the factors determining the methods of data processing
Date posted:
June 7, 2018
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What are the disadvantages of computers
Date posted:
June 7, 2018
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The two primary objectives of Operating System use
Date posted:
June 6, 2018
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Explain two roles of a computer driver.
Date posted:
June 4, 2018
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List three categories of operating systems.
Date posted:
May 26, 2018
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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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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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How does computer technology threaten the privacy of our data?
Date posted:
April 28, 2018
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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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Explain the meaning of information and communication technology (ICT).
Date posted:
April 19, 2018
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Differentiate between a macro and a module as used in computer applications.
Date posted:
April 3, 2018
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Explain the disadvantages of digitizers in transferring of spatial data to GIS.
Date posted:
March 29, 2018
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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;
(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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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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Distinguish between adaptive and probabilistic systems.
Date posted:
March 24, 2018
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Which is the first web browser invented in 1990?
Date posted:
February 26, 2018