1)
Size of integer dependant on compiler / architecture / OS ?
Ans: The sizes of the predefined
integer types depend on the compiler. The
decision of the compiler's author is likely to be guided by the
characteristics of the machine.
decision of the compiler's author is likely to be guided by the
characteristics of the machine.
2)
Ans: 4 bytes.
3)How std::string class is implemented?
Ans: Reference.
4)Why to use wide strings and how?
Ans:
To support the Asian languages Symbols/chars we need to use the
unicode .
The unicode is implemented
by wide strings
wchar_t
wch = 'a'; // 2 bytes, 0x0031
wchar_t
wsz = L"Hello"; // 12 bytes, 6 wide characters
cout<<wch<<endl;
cout<<wsz<<endl;
5)What is the scope of compiler optimization for volatile?
Ans:For volatile variables compiler optimization is ignored.
The memory resident for volatile variables is the physical memory.
