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NOUN Past Questions and Answers - CIT 381 File Processing and management SEPTEMBER/OCTOBER 2015 EXAMINATION

NOUN Past Questions and Answers - CIT 381 File Processing and Management SEPTEMBER/ OCTOBER 2015 EXAMINATION


1(a) Write short note on the following
(i) System Software
(ii) Application Software
(iii) Random Access
(2 marks each)
(b) List and explain five (5) uses of the Internet (11.5 marks)

2 (a) Write short note on each of the following
(i) Biometrics
(iii) Data Corruption:- refers to errors in computer data that occur during transmission or retrieval, introducing unintended changes to the original data.
(3 marks each)

(b) List any three (3) causes of data loss (6 marks)
Natural phenomenon such as: fire, flood, earthquakes, wars, riots or attacks from rodents
Hardware or software errors: CPU malfunctions, unreadable disks or tapes, telecommunication errors, program bugs
Human errors: incorrect data entry, wrong tape or disk mounted, wrong program run, lost disk or tape.

(c) Mention any two levels of security measures in system protection (2.5 marks)
Physical: The site or sites containing the computer systems must be physically secured against armed or surreptitious entry by intruders.
Human: Users must be screened carefully to reduce the chances of authorising a user who then gives access to an intruder (in exchange for a bribe, for example).
Network: Much computer data in modern systems travels over private leased lines, shared lines such as: the Internet, or dial-up lines.

(b) Write short note on each of the following:
Data Validation:- is the process of ensuring that a programme operates on clean, correct and appropriate data
Data Dictionary:- is the description of the data stored in a database.
Denial of Service:- is aimed not at gaining information or stealing resources but rather at disrupting legitimate use of a system or facility.

( c). List three implementation of file protection (6 marks)
File Naming
Password Protection
Access Control


3(a) Explain a sorting algorithm to a lay man? (6 marks)
sorting algorithm is a prescribed set of well-defined rules or instructions that puts elements of
a list in a certain order.
(b) List any five different sorting techniques. (5 marks)
Quick Sort
Heap Sort
Merge Sort
Insertion Sort
Bubble Sort
Shell Sort
Bucket Sort

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NOUN Past Questions and Answers for CIT 381 OCTOBER/NOVEMBER 2014 EXAMINATION

3(b) Outline three (3) different types of File Directory Structure (41/2 marks)
Single-Level Directory
Two-Level Directory
Tree-Structured Directory
Acyclic Graph Directory

4( a) Describe Free Space Management (4 marks)
Files are normally stored on disk, so management of disk space is a major concern to the file system designers. To keep track of free disk space, the system maintains a free space list.

4(b) Outline three (3) methods used in Free Space Management (41/2 marks)
Bit tables
Chained free portion
Indexing, and
Free block list.

4(c ) List and explain three measures of protecting systems ( 9 marks)
Physical: The site or sites containing the computer systems must be physically secured against armed or surreptitious entry by intruders.
Human: Users must be screened carefully to reduce the chances of authorising a user who then gives access to an intruder (in exchange for a bribe, for example).
Network: Much computer data in modern systems travels over private leased lines, shared lines such as: the Internet, or dial-up lines.

5(a) List and explain three (3) different ways through which a file could be protected? (9 marks)
Protected:- This can be implemented by allowing only users to see the files they have created.
Password Protection:-This scheme associates a password to each file.
Access Control:-An access list is associated with each file or directory. The access list
contains information on the type of users and accesses that they can do on a directory or file


5(b) Identify and explain two (2) tips for management of electronic files ( 4 marks)
Organise by file types. Make applications easier to find by creating a folder called Program Files on your drive and keeping all your applications there.

One place for all. Place all documents in the My Documents folder and nowhere else. So whether it’s a spreadsheet, a letter or a PowerPoint presentation, it goes here. This will make it easier to find things and to run backups.

5(c ) List three (3) example of Navigational File Manager (41/2 marks)
Windows Explorer
Mac OS X Finder
XTree / ZTreeWin
XYplorer

6(c ) Outline three (3) types of Search (41/2 marks)
Graph Search
Tree Search
List Search

Further Reading:
  1. NOUN Past Questions and Answers - CIT 381 File Processing and management SEPTEMBER/OCTOBER 2015 EXAMINATION - New!
  2. NOUN Past Questions and Answers - CIT 342 Formal Languages and Automata Theory October 2013 Examination - New!

NOUN Exam Past Questions and Answers - CIT 381 MARCH/APRIL 2014 EXAMINATION


1. (a) What is a File? (5 marks)
A file consists of a number of records, A file is a collection of related records.

3a. . What is FAT? (5 marks)
FAT is a sort of data structure or table used to keep track of the portions assigned to a file
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