Thokchom questions

• Why is absence of array index in "extern char name[]" not affecting strlen(name) but causing error for sizeof(name)?
• Why is the %n format specifier working normal for all scanf() statements but storing one less in the first one?
• Why printf("%s",(char[]){'H','i','\0'}) works as printf("%s","Hi"), but printf("%s",(char*){'H','i','\0'}); fails? [duplicate]
• Why is 'continue' statement ignoring the loop counter increment in 'while' loop, but not in 'for' loop?
• What is the difference between memcpy() and strncpy() given the latter can easily be a substitute for the former?
• What really is EOF for binary files? Condition? Character?

Thokchom answers