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National Open University Exam Past Question – CIT381 October, 2013 Examinations

National Open University Of Nigeria CIT381 File Processing and Management

14/16 Ahmadu Bello Way, Victoria Island, Lagos.

 

School Of Science and Technology

October, 2013 Examinations

 

Course Code: CIT381                                                                                             Time Allowed: 21/2 Hours. Course Title:  File Processing and Management

Instruction:   Answer 4 Questions.                           Total mark is 100 and each question carries 25 marks.

 

 

 

1(a) Write short note on the following

(i)          System Software

(ii)         Application Software

(iii)        Random Access                                                                         (5 marks each) (b) List and explain five (5) uses of the Internet                                                         (10 marks)

 

 

2(a) Write a short note on each of the following: (i)   A File

(ii)  A Record

(iii) A Field                                                                                                                      (3 marks each) (b) Mention and explain any three types of file you know                                        (10 marks)

(c) List three (3) File Organization Criteria (6 marks)

 

3(a) Write short note on each of the following

(i) Biometrics

(ii) User Authentication

(iii) Data Corruption                                                                                              (4 marks each) (b) List any three (3) causes of data loss                                                                       (9 marks)

(c) Mention any two levels of security measures in system protection                 (4 marks)

 

 

4(a) Explain what you understand by ”a path name”                                                  (7 marks) (b) List two (2) types of pathname                                                                                (8 marks) (c) Write briefly on the five types of operation that can be performed on a file.(10 marks)

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5(a) What are backups? List two types of backups?                                                    (7 marks) (b) Write short note on each of the following:

(i)          Data Validation

(ii)         Data Dictionary

(iii)        Denial of Service                                                                                     (4 marks each) (c) List three implementation of file protection                                                         (6 marks)

 

 

 

6(a) Explain a sorting algorithm to a lay man?                                                               (6 marks) (b) List any five different sorting techniques.                                                                 (10 marks) (c ) Mention three Objectives of File Management System                                         (9 marks)

 

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