UNIVERSITY OF CALABAR
CALABAR
DEPARTMENT OF MATHEMATICS/STATISTICS/COMPUTER SCIENCE
SECOND SEMESTER EXINATION 2005/2006.
COURSE NO: CSC 2222
1a. Explain the concept of file system within the computer system, pointing out the likely content of each file system. Why do you think a file is important to a computer system?
1b. Using suitable examples, describe any four (4) different types of files, pointing out the content in each case. Is linear list a file? If yes briefly describe what it is.
2a. Distinguish clearly between (i) logical and physical records (ii) sequential and direct storage medium (iii) primary and secondary storage devices.
2b. Describe the advantages of blocking records in a file. A specification is given to a file on magnetic tape as follows : blocking factor is 20; inter-block gap is 1.5cm; Density of tape is 2.5 bytes per inch, usable portion of tape is 24 feet. How many records of fixed length 110 can be stored in this tape?
3a. What do you understand by the term "file organisation"? Discuss the factors you would consider when. Choosing a file organisation.
3b. Discuss the concept of directories in your file system. Explain how you would protect your file(s) from unauthorised users.
SECTION B
4a. State any five (5) operations that can be performed on files. Using sequential file organization for illustration, discuss how three (3) of the operations can be implemented.
5a. Explain any three basic file allocation techniques, giving their respective merits and demerits.
5b. (i) Discuss the concept of random/direct file organisation.
(ii) Explained any two hashing techniques.
6a. Differentiate clearly between (i) linear probing and bucket chaining. (ii) Incremental and full backup.
6b. State any five backup guidelines.
UNIVERSITY OF CALABAR
CALABAR
DEPARTMENT OF MATHEMATICS/STATISTICS/COMPUTER SCIENCE
SECOND SEMESTER EXINATION 2005/2006.
COURSE NO: CSC 2222
1a. Explain the concept of file system within the computer system, pointing out the likely content of each file system. Why do you think a file is important to a computer system?
1b. Using suitable examples, describe any four (4) different types of files, pointing out the content in each case. Is linear list a file? If yes briefly describe what it is.
2a. Distinguish clearly between (i) logical and physical records (ii) sequential and direct storage medium (iii) primary and secondary storage devices.
2b. Describe the advantages of blocking records in a file. A specification is given to a file on magnetic tape as follows : blocking factor is 20; inter-block gap is 1.5cm; Density of tape is 2.5 bytes per inch, usable portion of tape is 24 feet. How many records of fixed length 110 can be stored in this tape?
3a. What do you understand by the term "file organisation"? Discuss the factors you would consider when. Choosing a file organisation.
3b. Discuss the concept of directories in your file system. Explain how you would protect your file(s) from unauthorised users.
SECTION B
4a. State any five (5) operations that can be performed on files. Using sequential file organization for illustration, discuss how three (3) of the operations can be implemented.
5a. Explain any three basic file allocation techniques, giving their respective merits and demerits.
5b. (i) Discuss the concept of random/direct file organisation.
(ii) Explained any two hashing techniques.
6a. Differentiate clearly between (i) linear probing and bucket chaining. (ii) Incremental and full backup.
6b. State any five backup guidelines.
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