A particular data file contains records that have the following format: accessNu

Question

A particular data file contains records that have the following format: accessNum: 8byte clerked: 8 byte value: 1000 byte The data file is stored on a disk, dedicated to data, with the following parameters: 2 surfaces 512 track/surface 64 sectors/track 1024 bytes/sector You need to make a secondary index on clerked. A block pointer requires 8 bytes. The current instance of the data file has 512 K. How many sectors (blocks) will the data file require? How many records will the index file require?

Explanation / Answer

total bytes of data file= 512*1024 bytes= 524288 bytes

Total Sectors= 2*512*64=65536 sectors

Total sectors for data file= 65536*1024/524288 =124

Total Records index file require = 124*8=992

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