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Explain three ways by which computer users can protect their eyes from harmful emissions from the computer screen
(Solved)
Explain three ways by which computer users can protect their eyes from harmful emissions from the computer screen
Date posted:
June 5, 2019
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Answers (1)
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A school bought a computer system. The hardware items supplied include: a 800 MHz processor, 64 MB of RAM, a sound card, speakers, a monitor,...
(Solved)
A school bought a computer system. The hardware items supplied include: a 800 MHz processor, 64 MB of RAM, a sound card, speakers, a monitor, a keyboard, a 120 GB hard disk, a floppy disk drive, a CD – Read/ write drive, a mouse, a modem, an inkjet printer and a joystick.
The software supplied include: an operating system, a BASIC interpreter and the following packages: spreadsheets, graphics, word processor, art, database and games
(a) List three input devices from the given specifications
(b) Explain the meaning of the following
(i) 800 MHZ
(ii) 64 MB of RAM
(iii) 120 GB hard disk
(c) Some of the students in the school use the computer to do homework. Name the package used to:
(i) Do calculations and draw graphs
(ii) Write an essay
(iii) Make a poster
(d) Students enjoy playing noisy computer games
(i) Which two hardware items are needed to produce sound?
(ii) Which input device is only used for playing games?
Date posted:
June 5, 2019
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Answers (1)
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A school organizes its work in directories. The director WP contains the files CATS, EXAMS and ASSIGNMENTS. The directory of SP contain the spreadsheet files....
(Solved)
A school organizes its work in directories. The director WP contains the files CATS, EXAMS and ASSIGNMENTS. The directory of SP contain the spreadsheet files. The directory DB contains the database files. The directory PROG is contained in the OTHERS directory. The directory WP also contains the PERSONAL directory. Given that the directory STUDENT contains directories SP, DB, WP and OTHERS
(a) Draw the directory tree structure with C as the root
(b) Write the path at which the contents of subdirectory DB can be erased or displayed
Date posted:
June 5, 2019
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Answers (1)
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Write the path for the directory PROG
(Solved)
Write the path for the directory PROG
Date posted:
June 5, 2019
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Answers (1)
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Give two reasons for storing files in directories and subdirectories
(Solved)
Give two reasons for storing files in directories and subdirectories
Date posted:
June 5, 2019
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Answers (1)
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Give two disadvantages of using command driven interfaces as compared to menu driven interfaces
(Solved)
Give two disadvantages of using command driven interfaces as compared to menu driven interfaces
Date posted:
June 5, 2019
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Answers (1)
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Indicate whether the following devices are used for input or output
(i) Plotter
(ii) Light pen
(iii) mouse
(iv) Visual display unit
(Solved)
Indicate whether the following devices are used for input or output
(i) Plotter
(ii) Light pen
(iii) mouse
(iv) Visual display unit
Date posted:
June 5, 2019
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Answers (1)
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Explain why the following controls should be implemented for computer based systems
(i) Back- ups
(ii) Password
(Solved)
Explain why the following controls should be implemented for computer based systems
(i) Back- ups
(ii) Password
Date posted:
June 5, 2019
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Answers (1)
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For each of the following give one reason why they are not allowed in a computer laboratory
(i) Smoking
(ii) Eating foods
(Solved)
For each of the following give one reason why they are not allowed in a computer laboratory
(i) Smoking
(ii) Eating foods
Date posted:
June 5, 2019
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Answers (1)
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The cells K3 to K10 of a worksheet contain remarks on students ’ performance such as very good, good, fair and fail depending on the...
(Solved)
The cells K3 to K10 of a worksheet contain remarks on students ’ performance such as very good, good, fair and fail depending on the average mark. Write a formula that can be used to count ALL students who have the remark “very good”.
Date posted:
June 5, 2019
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Answers (1)
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A serial file comprises of records placed in positions 1 to 10. State the position of the end of the file market.
(Solved)
A serial file comprises of records placed in positions 1 to 10. State the position of the end of the file market.
Date posted:
June 5, 2019
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Answers (1)
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Name the control structure depicted by the flowchart below
(Solved)
Name the control structure depicted by the flowchart below
Date posted:
June 5, 2019
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Answers (1)
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Consider the linear arrays:
i) AA (5: 50)
ii) BBB (-5:50)
iii) CCC (18)
Find the number of elements in each array.
(Solved)
Consider the linear arrays:
i) AA (5: 50)
ii) BBB (-5:50)
iii) CCC (18)
Find the number of elements in each array.
Date posted:
June 5, 2019
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Answers (1)
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What is Alignment?
(Solved)
What is Alignment?
Date posted:
June 5, 2019
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Answers (1)
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What is Word wrap in word?
(Solved)
What is Word wrap in word?
Date posted:
June 5, 2019
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Answers (1)
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Outline two ways in which computers can be used in hotels.
(Solved)
Outline two ways in which computers can be used in hotels.
Date posted:
June 5, 2019
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Answers (1)
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Write the number 45110 in BCD notation
(Solved)
Write the number 45110 in BCD notation
Date posted:
June 5, 2019
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Answers (1)
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Arrange the following data units in ascending order of size.
BYTE, FILE, BIT, NIBBLE
(Solved)
Arrange the following data units in ascending order of size.
BYTE, FILE, BIT, NIBBLE
Date posted:
June 5, 2019
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Answers (1)
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State the stage of program development in which:
i) A flowchart would be drawn
ii) The programmer would check whether the program does as required program
iii) The...
(Solved)
State the stage of program development in which:
i) A flowchart would be drawn
ii) The programmer would check whether the program does as required program
iii) The user guide would be written
iii) The user guide would be written
iv) The requirements specification would be written.
Date posted:
June 5, 2019
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Answers (1)
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State the output of the following flowchart segment
(Solved)
State the output of the following flowchart segment
Date posted:
June 5, 2019
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Answers (1)