(a) What is a computer file?

(b) State two features each of: (i) transaction file (ii) reference file.

(c) List two: (i) effects of file insecurity (ii) methods of securing files.

(a) Define the term system development cycle. (b) List four stages involved in system development cycle (c) State four qualities of a good program. 

(a) List the two main constituents of a computer (b) State four characteristics of a computer.

(c) In a tabular form, categorize each of the following statements into either data or information: (i) It is no significant alone by itself; (ii) It is significant by itself

(iii) It is obtained through observations and recordings (iv) It is obtained through analysis.

(a) Define algorithm. (b) State three characteristics of an algorithm. (c) Write an algorithm for finding the average of numbers, when the sum of the numbers is given.