NATIONAL OPEN UNIVERSITY OF NIGERIA

UNIVERSITY VILLAGE, PLOT 91, CASDASTRAL ZONE, NNAMDI AZIKIWE EXPRESS WAY, JABI, ABUJA.
FACULTY OF SCIENCES
MAY/JUNE 2012 EXAMINATION

COURSE CODE:                    CIT381    
COURSE TITLE:                    File Processing and Management
TIME ALLOWED:                    2½ Hours
INSTRUCTIONS:                    Answer any Four (4) Questions

Q1.a    List and explain the Logical Components of a file.                                 (10 marks) 
      b.    Mention and explain any three types of file you know                      (9 marks) 
      c.     List three (3) File Organisation Criteria                              (6 marks)  

Q2.a    What types of file extensions will the following contain: 
(i)     A movie in a Video CD 
(ii)     A word processed file 
(iii)     A file in a Musical CD 
(iv)     A Scanned image 
(v)     A picture taken with a digital camera.                     (2 marks each)
      b.     What is the full meaning of the following acronyms: 
(i)     CBIS         (ii)     CPU         (iii)     RAM         
(iv)     ROM         (v)     FAT                             (2 marks each) 
     c.     What do you understand by blocking of records?                          (5 marks)

                    
Q3.a    What is file management system?                                  (8 marks) 
      b.    What do you understand by the following: 
(i)     Disk quotas 
(ii)    Volume                                     (4 marks each) 
      c.     List three (3) objectives of file management system                      (9 marks) 

Q4.a    Explain what you understand by “a path name”                         (7 marks) 
      b.     Write briefly on the five types of operation that can be performed on a file.                (10 marks) 
      c.     List two (2) types of pathname                                  (8 marks)

Q5.a    Differentiate between the following with regards to files operations 
(i)    Truncating and deleting 
(ii)    Writing and appending 
(iii)    Reading and repositioning 
(iv)     Creating and opening                             (3 marks each)
      b.     List and explain three (3) operations that are to be performed on a directory.          (9 marks) 
      c.     List two (2) methods of improving file system performance.                  (4 marks)

Q6.a    What are backups?                                          (5 marks) 
      b.     Mention two (2) types of backups you know                          (8 marks) 
      c.     Explain what you understand by user authentication                      (8 marks) 
      d.     How can user authentication be implemented?                         (4 marks)