Which of the following is the better way to implement mathematical matrix operation such as plus, minus and multiply with C++? A- Define matrix operation functions like below. Matrix Matrix :: pls(Matrix mat1, Matrix mat2); Matrix Matrix :: min(Matrix mat1, Matrix mat2); Matrix Matrix :: mlt(Matrix mat1, Matrix mat2); B- Override operators like below Matrix Matrix :: operator +(Matrix m2) Matrix Matrix :: operator -(Matrix m2) Matrix Matrix :: operator *(Matrix m2)

Correct way to declare a function as constant?

Cannot read /proc//mem file even with root privilege due to permission error. How to solve it? intmem_file = open(“/proc/12345/mem”, O_RDONLY); // returns permission error

This code: template void Kill(T *&objPtr) { delete objPtr; objPtr = NULL; } class MyClass { }; void Test() { MyClass *ptr = new MyClass(); Kill(ptr); Kill(ptr); } Invoking Test() will cause which of the following?

Code will exhibit undefined behavio What will be the result of calling the h() function in the following C++ code? const char* upwork[] = { "Freelancers", "Projects", "Fixed", "Hourly" } const char* f(inti) { return upwork[i]; } void g(string s){} void h() { const string& r = f(0); g(f(1)); string s = f(2); cout<< "f(3): " << f(3) << " s: " << s << " r: " << r << '\n'; }

Which of the following statements are true about conversions in C++? (Choose all that apply.)

Output of following code:- #include using namespace std; int main() { int a = 1, b = 2, c, d; c = a, b; d = (a, b); cout << c << ' ' << d; return 0; }

Which gets called when an object goes out of scope?

Which access specifier is used in a class definition by default?

Which statement is incorrect?

Every object in the array receives a destructor call, always delete memory allocated as an array with operator ___.