Which of the following functions in c/c++ can be the cause of buffer overflow? Each correct answer represents a complete solution. Choose two.

printf() is primarily associated with format string vulnerabilities when user-controlled input is passed as the format argument, not with classic buffer overflow caused by unchecked memory writes.

strcat() appends a source string to a destination buffer without verifying that the destination has sufficient space to hold the result, allowing writes beyond the allocated buffer boundary.

strcpy() copies a source string into a destination buffer without checking the destination size, so if the source is longer than the allocated buffer, it will overwrite adjacent memory and cause a buffer overflow.

strlength() is not a valid C/C++ standard library function - the correct function is strlen() - and strlen() only reads string length without writing to any buffer, so it cannot cause a buffer overflow.