State the difference between realloc and free.
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Answer / Bappa Bagchi
realloc is used to change the size of a block of memory previously allocated with malloc, calloc, or realloc. If the new size is larger, the contents of the old block are copied to the new location and the original block is returned. If the new size is smaller, the contents are preserved as much as possible and any remaining memory is deallocated. free is used to deallocate a block of memory previously allocated with malloc, calloc, or realloc, making it available for future allocation.
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