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If you fail to check whether input to a temporary area in memory is valid or not, you are risking exposure to which of the following?
Backdoor
Garbage input
Failover
Buffer overflow
Buffer overflows occur when the input size exceeds the allocated buffer.
EDIT: This is a poorly worded buffer overflow question. As a developer, this makes more sense to say you'd get an exception if trying to write to invalid/inaccessible address space. Buffer overflows are specific to writing more data to any address space that is larger than intended.
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