An operating system organizes files in directories as shown in the chart below.Study it and answer the questions that follow.
(a) (i) What is the name of this file structure?
(ii) One of the files in MISCELLANEOUS has a file name similar to one in CHEMISTRY in Form 1. Describe what happens if all the contents of CHEMISTRY are copied to MISCELLANEOUS. (iii) What will happen if an attempt is made to delete FORM2 while File_10 in MATHEMATICS is open? (iv) State four advantages of this structure. (b) State four properties that an operating system displays about a file. (c)A removable storage media unit connected to a single user microcomputer system is used for permanent storage of programs and data. State six file functions you would expect the operating system of the computer to provide to enable the user to maintain this storage media. (d) State two tasks performed by the operating system in each of the following resources: (i) memory; (ii) input/output devices.
RESPONSES
(a) (i) Hierarchical Structure/Tree structure.
(ii) File 02 and 03 with be replicated in miscellaneous.
(iv)
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 The information 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 type 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?
EXPECTED RESPONSES
(a)The field values are the values assigned to the attributes, that is, actual names, classes.
(c) (i) Text/Number/character. (ii) Text/Character/String/alphanumeric. (i)
(ii) 11 List three advantages and three disadvantages of wired communication over wireless communication.31/12/2020 List three advantages and three disadvantages of wired communication over wireless communication.
Advantages
Disadvantages (b) Describe the following signals and state where each is applied in network communication: (i) analog; (ii) digital. (c) Name the two types of coaxial cables, (d) (i) Define the term network protocol. (ii) List four internet protocols.
RESPONSES
(a) Advantages
(ii) Digital: Pulses of electricity. (c)
(ii)
Describe two ways ¡n which a computer can represent a positive number and a negative number.31/12/2020 Describe two ways in which a computer can represent a positive number and a negative number.
(b) A particular computer stores numbers in a single 8-bit word. How would it represent 0.312510 ?
(c) What is the decimal equivalent of the number 1.01112? (d) Perform the decimal subtraction 1410- 610 using (i) regular binary; (ii) one’s complement.
Study the flow chart below and answer the questions that follow.
If DATA is the following sorted list of 13 elements, such that N 13:(where N is the number of elements in the list),1 1, 22, 30, 33, 40, 44, 55, 60, 66, 77,
80, 88, 99. (a) Determine the output from the flowchart if ITEM is: (1) 40 (ii) 99 (iii) 120 (iv) 5 (b) Explain the purpose of this flowchart. (c) Write a pseudocode for the above flowchart. 
State two advantages of using robots in manufacturing of goods.
Distinguish between formatting a disk and scanning a disk with reference to operating systems.31/12/2020 Distinguish between formatting a disk and scanning a disk with reference to operating systems.
In relation to DTP. state the:purpose of frames; and difference between an inside margin and an outside margin.
State two ways in which each of the following can be prevented: software errors; and computer fraud.31/12/2020 State two ways in which each of the following can be prevented: software errors; and computer fraud.
(a) software errors
Headache, back and neck pain may result from use of computers. State how each of them can be minimised.
List four stages in data collection.
(b) What is meant by the following:
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