A water company sends out clerks to read meters. The data collected by the clerks is then fed into the computer and then all bills are printed at the same time.
(a)State two advantages of this approach;
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The C directory of a computer has folders named Form 1, Form 2,Form 3 and Form 4. Each class has students' folders named according to their admission number. The students created their own folder for subjects they are studying based on the table shown below:
(a) A form four student intends to create a folder named proj to store project documents.
State the path for the project folder.
(i) work is not lost in case the hard disk fails;
Distinguish between a formula and a function as used in spreadsheets.
List two career opportunities directly associated with computer networking.
Explain why an intranet is a more secure way to share files within an organisation compared to the Internet.
Students of a school intend to elect their school captain by secret ballot. State three ways in which computers can be used to improve the election process.
Headache, back and neck pain may result from the use of computers.
State how each of them can be minimised.
Headache
An organisation intends to replace an existing system by carrying out the process in stages.12/1/2021 An organisation intends to replace an existing system by carrying out the process in stages.
(a) Name this implementation strategy;
Technical feasibility:
State the functions of each of the following keys on the computer keyboard:
(a) backspace;
Convert each of the following binary numbers to decimal equivalent given that the left most digit is a sign bit:
(a) 00101101
(b) 11001001 
State two ways in which software errors can be prevented in program development.
Explain two ways in which the use of Internet could make reporting of corruption easier.
Interactiveness:
Pesa Tele Company has offices in Nairobi and Kampala connected in a network. The management is convinced that someone is illegally gaining access to the data in their computers. State three ways in which the company can overcome this problem.
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)
 State the meaning of the term disk defragmentation as used in computers.
(a) generating receipts where carbon copies are required;
(b)an architectural drawing where precision is required; (c) producing document output for a visually impaired person.
(a)Carbon copies - impact printers e.g. dot matrix.
(b)Architectural design - plotter (c)Visual impairment - speakers/brailles 
State the meaning of the term disk defragmentation as used in computers.
State the purpose of disk defragmentation.
Explain two ways in which the use of internet could make reporting of corruption easier
(b) Explain two circumstances under which the use of wireless communication would be preferred in data communication.
(c) Figure 2 is an extract of a spreadsheet showing what the students had targeted to score and the actual score in a computer remedial class. 
A performance factor is obtained by subtracting the target score from the actual score and dividing the difference by the target score.
Write a formula that uses cell references only that would be entered in cell: (i) D2 to compute the performance factor. (ii) E2 to display the statement ‘more remedials’ if the performance factor is less than zero, ‘exempted’ if the factor is greater than zero and ‘optional remedials’ if otherwise. (iii) D8 to display the best performance factor.
RESPONSES
(a) Ways ¡n which internet makes reporting of corruption easier.
List two techniques of acquiring electronic images to be used in a desktop publishing program.10/1/2021 List two techniques of acquiring electronic images to be used in a desktop publishing program.
(ii) Describe two layout guides in a desktop publishing program (DTP) that assist a user to place an object in a preferred position.
(b) Explain three ways of ensuring that data submitted for processing is accurate. (c)An engineering company requires a computer system to design roads and bridges. Explain one suitable choice for: (i) output device; (ii) software.
RESPONSES
(a) (i) Ways of acquiring images in DTP:
(ii) A CAD software because it facilitates in the design of engineering drawings. 
State three functions of networking operating systems other than providing network security.10/1/2021 State three functions of networking operating systems other than providing network security.
(b) Explain three ways in which an operating system provides data security in a computer system.
(c) Explain three circumstances under which observation method may be preferred during data collection.
(a) Functions of network operating systems
In the BCD number coding scheme, letter A is represented by 110001 and letter B by 110010. Determine how the word CAB is coded in BCD.
(ii) Convert the decimal number 11.125 to its binary number system equivalent.
(iii) Perform the binary arithmetic: 111.01 + 1011.111 — 101.011 and convert the answer to decimal notation. (b) Explain the importance of each of the following in word processing: (i) tab stops; (ii) section breaks. (c) State three documents that are used during mail merging in word processing.
ANSWERS
(b) Importance of tab stops and section break
List four web programming languages.
State four ways in which a programmer can make program code easy to fol1ow
Using modules or short blocks of program/functions/procedures;
Making internal documentation / comments; Using meaningful variable names and user words in the program; Using indent to represent nested statement: Using blank lines to separate blocks of code statement; Test formatting of reserved words e.g. bolding Draw a program flowchart to represent the following pseudocode.
ANSWER
Distinguish between a systems administrator and a database administrator as used in computers.10/1/2021 Distinguish between a systems administrator and a database administrator as used in computers.
Distinguish between systems administrator and database administrator
Explain two uses of a system documentation in system development.
Uses of system documentation
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