In C programming, which storage class specifies that a variable is stored in the CPU register instead of RAM for faster access?
Option D is correct. Both Option A and related standard techniques apply here. The 'register' storage class suggests to the compiler that the variable be stored in a CPU register instead of RAM to allow faster access.
What is the result of applying the sizeof operator to a pointer variable pointing to an integer on a 64-bit architecture?
Option C is correct. On a 64-bit system architecture, all memory address pointers (regardless of the data type they point to) occupy 8 bytes of memory.
Which function in the C standard library is used to release dynamically allocated memory back to the heap?
Option A is correct. In C, free(ptr) is used to deallocate memory previously allocated by malloc(), calloc(), or realloc().
What condition leads to a 'dangling pointer' in C/C++ programming?
Option A is correct. A dangling pointer arises when memory pointed to by the pointer is freed or destroyed without resetting the pointer to NULL.
In C++, which keyword is used to declare a member function that must be overridden by derived classes and cannot be instantiated directly in the base class?
Option C is correct. Appending '= 0' to a virtual function declaration in C++ makes it a Pure Virtual Function, rendering the containing class abstract.