Neco 2017 Data Processing Question 31
Practice objective / multiple choice question 31 from the 2017 Neco Data Processing examination.
An organization stores employee records in two files. Records with employee ID less than 5000 are kept in a sequential file, while the remaining records are kept in an indexed file. Each record occupies \(200\) bytes and the block size of the storage device is \(1\,KB = 1024\) bytes. The indexed file requires on average \(3\) block accesses to locate a record. Assuming employee IDs run consecutively from \(1\) to \(10\,000\), calculate the average number of block accesses required per query, given that \(30\%\) of queries request records from the sequential file and the rest request records from the indexed file.
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About This Question
This is Neco 2017 Data Processing Question 31. It is one of the objective questions from the 2017 Neco Data Processing examination.
Difficulty level: Medium .
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