We need to keep track of the available, or free, blocks in the file. Rather than maintaining a separate list of the free blocks, we can allocate some space in each block for the numbers of its preceding and succeeding blocks. Do you agree with that? Why? Is there any better way to do that? Let us discuss with examples.
2. Deletions from the data file involves moving records to fill the empty slot. This could involve moving records across block boundaries (similar to the shifting data necessary for insertion), and could result in returning a block to the system if the last block in the chain becomes empty. Explain this operation and give code examples.
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