Which of the following permissions would be appropriate for the executable of a C++ program? 755 O 644 0911 411 Question 3 1 pts How is C++ related to C? Cis the UNIX version and C++ is for Windows Cadds new features to C++ C++ adds new features to C They're really the same thing Question 4 1 pts What is the best definition of a null-terminated string? A string that is of arbitrary length Answer a, but with a null character to indicate the end of the string O A class introduced in C based on the C++ string struct None of the above