Calculate the average record length r in bytes

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Reference no: EM132218524

Suppose that only 80 percent of the STUDENT records from Question 7 have a value for Phone , 85 percent for Major_dept_code , 15 percent for Minor_dept_code , and 90 percent for Degree_program ; and suppose that we use a variable-length record file.

Each record has a 1-byte field type for each field in the record, plus the 1-byte deletion marker and a 1-byte end-of-record marker.

Suppose that we use a spanned record organization, where each block has a 5-byte pointer to the next block (this space is not used for record storage).

a. Calculate the average record length R in bytes.

b. Calculate the number of blocks needed for the file.

Reference no: EM132218524

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