Maurice Tutor

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Teaching Since: May 2017
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  • MCS,PHD
    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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  • Professor
    Phoniex University
    Oct-2001 - Nov-2016

Category > Computer Science Posted 17 Sep 2017 My Price 5.00

deletion marker

1. A file has r= 20,000 STUDENT records of fixed length. Each record has the following fields:Name(30 bytes),Ssn(9 bytes),Address(40 bytes),PHONE (10 bytes),Birth_date(8 bytes),Sex(1 byte),Major_dept_code(4 bytes), Minor_dept_code(4 bytes),Class_code(4 bytes, integer), and Degree_program (3 bytes). An additional byte is used as a deletion marker. The file is stored on the disk whose parameters are given in the above question.

a. Calculate the record size R in bytes.

b. Calculate the blocking factor bfr and the number of file blocks b, assuming an unspanned organization.

c. Calculate the average time it takes to find a record by doing a linear search on the file if (i) the file blocks are stored contiguously, and double buffering is used; (ii) the file blocks are not stored contiguously.

d. Assume that the file is ordered by Ssn; by doing a binary search, calculate the time it takes to search for a record given its Ssn value.

Answers

Maurice Tutor
(5)
Status NEW Posted 17 Sep 2017 06:09 AM My Price 5.00

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