An organization stores a file of 10,000 records, each record occupying 150 bytes. The storage medium uses blocks of 4,096 bytes.

(a) For a sequential file organization, calculate the minimum number of blocks required to store the entire file.
(b) For an indexed‑sequential file, a primary index entry occupies 12 bytes and one index entry is stored per block of data. Determine the number of index blocks needed and the total number of blocks (data + index) required.
(c) Which organization uses fewer total blocks? State the difference in the number of blocks between the two methods.

Question

An organization stores a file of 10,000 records, each record occupying 150 bytes. The storage medium uses blocks of 4,096 bytes.

(a) For a sequential file organization, calculate the minimum number of blocks required to store the entire file.
(b) For an indexed‑sequential file, a primary index entry occupies 12 bytes and one index entry is stored per block of data. Determine the number of index blocks needed and the total number of blocks (data + index) required.
(c) Which organization uses fewer total blocks? State the difference in the number of blocks between the two methods.

Accepted Answer

Sequential: 371 blocks; Indexed‑sequential: 373 blocks; Indexed uses 2 more blocks.

Neco 2024 Data Processing Question 47

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