a) Simplex transmission.
- Date is transmitted in one direction only.
(b) Half duplex transmission
- Data is transmitted in two directions but only in one direction at a time.
(c) Full duplex transmission
- Data is exchanged between two devices in both directions simultaneously.
marto answered the question on November 8, 2019 at 10:45
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Explain any two ways in which computers have been made user-friendly for persons that are physically challenged.
(Solved)
Explain any two ways in which computers have been made user-friendly for persons that are physically challenged.
Date posted:
November 8, 2019
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Answers (1)
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State any two types of documentation created in system development.
(Solved)
State any two types of documentation created in system development.
Date posted:
November 8, 2019
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Answers (1)
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Anthony, a student at Kericho Technical College defined a computer as "an electronic device which accepts, processes data and produce information depending on its decisions"....
(Solved)
Anthony, a student at Kericho Technical College defined a computer as "an electronic device which accepts, processes data and produce information depending on its decisions". Was this student right? Explain you answer.
Date posted:
November 8, 2019
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Answers (1)
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Work out 3210-1910 in 8-bit binary notation;
(Solved)
Work out 3210-1910 in 8-bit binary notation;
(i) As a signed magnitude representation using ones complements.
(ii) Using two’s complement
Date posted:
November 7, 2019
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Answers (1)
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Convert each of the following numbers;
(Solved)
Convert each of the following numbers;
(i) 126810 to hexadecimal
(ii) 51C3D16 to its binary equivalent
(iii) 84C16 to octal
(iv) 1768 to hexadecimal.
Date posted:
November 7, 2019
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Answers (1)
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State and explain two reasons why higher number systems were developed in computing
(Solved)
State and explain two reasons why higher number systems were developed in computing
Date posted:
November 7, 2019
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Answers (1)
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The information in figure 3 below is maintained by the patron of wildlife club in a school. Study it and answer the questions that follow.
(Solved)
The information in figure 3 below is maintained by the patron of wildlife club in a school. Study it and answer the questions that follow.
(a) Describe the field values, records and file.
(b) State the most appropriate primary key for the list.
(c)State the most appropriate data types for the fields:
(i) Admission number
(ii) Membership number.
(d) If a database was to be created for the list; forms, tables, queries and reports are likely to be used.
(i) State the purpose of each of these objects.
(ii) Which objects cannot be used to store the data in the list?
(e) (i) How many field values are in the list?
(ii) How many records are in the list?
Date posted:
November 7, 2019
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Answers (1)
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An airline uses an information system whereby if a passenger at station A books a plane seat, this transaction is immediately shown at stations A...
(Solved)
An airline uses an information system whereby if a passenger at station A books a plane seat, this transaction is immediately shown at stations A and B such that no other passenger can book the same seat.
(I) Name this data processing mode.
(II) State two advantages of this data processing mode.
Date posted:
November 7, 2019
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Answers (1)
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State two advantages of using coaxial cables over satellite in data communication.
(Solved)
State two advantages of using coaxial cables over satellite in data communication.
Date posted:
November 7, 2019
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Answers (1)
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Define the term data communication.
(Solved)
Define the term data communication.
Date posted:
November 7, 2019
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Answers (1)
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What is meant by Blog?
(Solved)
What is meant by Blog?
Date posted:
November 7, 2019
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Answers (1)
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Study the flowchart in figure 2 below and use it to answer the questions that follow.
(Solved)
Study the flowchart in figure 2 below and use it to answer the questions that follow.
(i) Name the control structures used in the flowchart.
(ii) Determine the value of A, B, C and F.
iii) Write a pseudocode for the flowchart in figure above.
Date posted:
November 7, 2019
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Answers (1)
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List two factors that dictate the cost of a computer system.
(Solved)
List two factors that dictate the cost of a computer system.
Date posted:
November 7, 2019
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Answers (1)
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Describe the process of transactions handling at the electronic point of sale terminals in a retail outlet
(Solved)
Describe the process of transactions handling at the electronic point of sale terminals in a retail outlet
Date posted:
November 7, 2019
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Answers (1)
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What are repetitive strain injuries?
(Solved)
What are repetitive strain injuries?
Date posted:
November 7, 2019
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Answers (1)
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A trader uses a spreadsheet program to calculate profits.
The figure below shows the spreadsheet.
(Solved)
A trader uses a spreadsheet program to calculate profits.
The figure below shows the spreadsheet.
(a)Which row contains labels only?
(b) Write the formula that has been entered in cell F2.
Date posted:
November 7, 2019
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Answers (1)
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Give three hardware considerations that should be made before installing an operating system.
(Solved)
Give three hardware considerations that should be made before installing an operating system.
Date posted:
November 7, 2019
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Answers (1)
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Explain two factors that may prompt an organization to develop their own software rather than buy over the shelf softwares.
(Solved)
Explain two factors that may prompt an organization to develop their own software rather than buy over the shelf softwares.
Date posted:
November 7, 2019
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Answers (1)
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Fifth generation computers are said to be characterized by the emergence of artificial intelligence.
Explain.
(Solved)
Fifth generation computers are said to be characterized by the emergence of artificial intelligence.
Explain.
Date posted:
November 7, 2019
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Answers (1)
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Draw a diagram to show a system that is controlled through feedback.
(Solved)
Draw a diagram to show a system that is controlled through feedback.
Date posted:
November 6, 2019
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Answers (1)