Describe virtual reality as used in computers. (2 marks)
Virtual Reality is the computer generated simulation of a three-dimensional
image or environment that can be interacted with in a seemingly real or physical way by a person using a specialized electronic head gear, 
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State three ways of transforming a picture embedded in a Desktop Publishing programme in order to fit in a designated space on a document. (3 marks)
Ways of transforming a picture in a DTP
Differentiate between a line printer and a page printer as used in computers. (2 marks)
A line printer is an impact printer that prints one entire line of text at a time
while a page printer is a non impact printer that prints a Whole page at a timer 
Convert the decimal number 20.373 to its binary number system equivalent. (3 marks)
Converting 20 base 10 into binary
since the result was long, we just decided to truncate at 16th digit however it can exceed
0.37310 = 01011111011111002The binary result of 20.37310 is therefore
Combine them all;
State the hardware technological differences between the second generation and the third generation computers. (2 marks)
the honeywell 200 was an example of 2nd generation computer
State two ways of ensuring proper ventilation in a computer room. (2 marks)
 a) Distinguish between Computer Aided Instruction (CAI) and Computer Aided Learning (CAL). (4 marks)
b)(i) State four activities that may be carried out when disposing off an old system in an organization. (4 marks)
ii) State four ways of getting user specifications during systems design. (4 marks)
 A) Explain three features of a graphical user interface as used in computers. (6 marks)
B) State the function of each of the following computer keyboard keys:
(i) Caps Lock (1 mark)
(ii) Shift (1 mark) (iii) Home (1 mark)
(i) Function of Caps lock
- It’s a toggle key when ON, the characters typed are in uppercase when OFF, the characters typed are in lower case. (ii) Shift key - Used to enable uppercase letter to be printed when alphanumeric keys are pressed. - Used with other keys to modify behavior/function key. (iii) Home key - Used to take the cursor to the beginning of the line in a word processor. - Evidence of movement of the cursor. C) Using two complement notation, determine the value of the operation 2510 — 2910 (6 marks)
A) State three hardware devices that may be required to connect a computer to an existing local area network. (3 marks)
B) A publisher intends to use a desktop publishing programme to create a publication which is to have many graphics. State three ways in which the graphics may be acquired for this purpose. (3 marks)
C) Interpret each of the following spreadsheet formula:(i) = countif(D2:D9, “>“&B4) (2 marks) (ii) sumif(B3 :B 11, “4M”, D3 :D11) (2 marks) (i) = Countif (D2 : D9, “>“ & B4)
(D) The following are the fields of products table in a database created to store records of products manufactured in a factory:
II. State three properties to be put in place during table design to ensure integrity of the data entered. (3 marks) I) Product Number — Number/Autonumber/Text
 A) State four outcomes that may result from using incorrect requirement specifications during systems development. (4 marks)
B) A school opted to use direct change over approach when installing a new system. |
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