What is the value of a following the below sequence of C++ statements? int a = 7; int& r = a; r = 8;

Reference is like a ____.

Best 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?

Output of following program? #include using namespace std; int main() { int i, j; j = 0; i = (j++, j + 1, 2 + j); cout << i; return 0; }

Output of the following? #include using namespace std; int main () { int x, y; x = 1; y = ++x * ++x; cout << x << y; x = 1; y = x++ * ++x; cout << x << y; return 0; }

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?