Question

What function do you use to move a block of memory to another location?

a) memcpy()
b) memmove()
c) memset()
d) memcmp()

Answer 1

To move a block of memory safely, especially when the source and destination may overlap, the memmove() function is used.

Step-by-step explanation:

To move a block of memory to another location, the appropriate function to use is b) memmove(). The memcpy() function can also copy memory blocks, but it does not handle overlapping memory areas well. memmove(), however, is designed to handle cases where the source and destination blocks overlap: it ensures that the overlapping region is correctly handled and the memory is copied as if an intermediate buffer were used.

memset() is used to set a block of memory to a particular value, and memcmp() is a comparison function used to compare two blocks of memory. It's important to choose the correct function based on the operation you want to perform.