Neco 2023 Data Processing Question 47
Practice objective / multiple choice question 47 from the 2023 Neco Data Processing examination.
A file contains 5,000 records, each 200\,bytes long. The disk block size is 1,024\,bytes. An index file stores the block number of the first record of each data block (one index entry per data block). Disk parameters: average seek time 5\,ms, rotation time 8\,ms per revolution, and transfer time 0.5\,ms per block.\n\n(a) How many data blocks are required to store the file?\n(b) How many index blocks are needed?\n(c) What is the worst‑case time (in milliseconds) to locate a randomly chosen record by (i) a sequential scan of the data blocks (no index) and (ii) using the index file (reading the necessary index block and then the data block)?
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About This Question
This is Neco 2023 Data Processing Question 47. It is one of the objective questions from the 2023 Neco Data Processing examination.
Difficulty level: Medium .
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