Pointer in C Language - Quiz

What is the difference between a const pointer and a pointer to a const in C?
  • A A const pointer cannot be dereferenced, while a pointer to a const can
  • B A const pointer cannot be reassigned to point to a different memory location, while a pointer to a const can
  • C A const pointer points to a const object, while a pointer to a const can point to a non-const object
  • D A const pointer and a pointer to a const are equivalent in C

Which of the following is the correct way to declare a pointer to an integer variable in C? int *x = &y;
  • A <code>int x = &amp;y;</code>
  • B <code>int *x = y;</code>
  • C <code>int &amp;x = y;</code>
  • D <code>int *x = &amp;y;</code>

What will be the output of the following program? 
void main()
{
int const *p = 5;
Printf("%d", ++(*p));
}

  • A 5
  • B 6
  • C Compiler error
  • D Unexpected results

What is a double pointer in C?
  • A A pointer that can point to two different memory locations
  • B A pointer that stores a floating-point value
  • C A pointer that points to another pointer
  • D A pointer that can store two integer values

What is the output of this C code? 
    void main()
    {
        int x = 4;
        int *p = &x;
        int *k = p++;
        int r = p - k;
        printf("%d", r);
    }

  • A 4
  • B 8
  • C 1
  • D Run time error

What is a pointer in C?
  • A A data type
  • B A memory address
  • C A keyword
  • D A function

Can we have a pointer to a function?
  • A Not possible
  • B Possible
  • C Depends on the return value
  • D Depends on the # of arguments

What is a NULL pointer in C?
  • A A pointer that points to a non-existent memory location
  • B A pointer that has not been initialized
  • C A pointer that points to the first memory location in the system
  • D A pointer that points to the end of the system memory

What is the output of this C code? 
    int main()
    {
        int i = 10;
        int *p = &i;
        printf("%d\n", *p++);
    }

  • A Garbage value
  • B 10
  • C 11
  • D Address of i

What is the difference between a pointer and a reference in C++?
  • A A reference is a type of pointer
  • B A pointer can be reassigned to point to a different memory location, while a reference cannot
  • C A reference must be initialized when it is declared, while a pointer does not have to be
  • D A pointer is a copy of the value it points to, while a reference is an alias for the value it refers to