ALTER  placement papers  

C questions

1.                   int b=10;
 int *p=&b;
*p++;
 printf("%d",*p);
what is the output? 

2.                   What is the difference between malloc, 
calloc and realloc? 

3.                   What does malloc return in C and C++? 

4.                    main()
{
char *a="hello";
char *b="bye";
char *c="hai";
int x=10,y=100;
c=(x<y>)?a:b;
printf("%s",c);
}
whats the output? 

5.                    void main()
{
  int a,b;
  a=sumdig(123);
 b=sumdig(123);
 printf("%d %d",a,b);
}
int sumdig(int n)
{
  static int sum;
  int d;
 if(n!=0)
{
d=n%10;
n=(n-d)/10;
  sum=sum+d;
  sumdig(n);
}
else
return s;
}
what is the output? 

6.                   Declare a pointer to a function that 
takes a char pointer
as argument and returns a void pointer. 

7.                   How do we open a binary file in 
Read/Write mode in C?

  C++ questions

8.                   class A
{
public:
A()
{
}
~A();
};
class derived:public A
{
derived();
};
what is wrong with this type of declaration? 

9.                   what do you mean by exception 
handling? 

10.               What are "pure virtual" functions? 

11.               What is the difference between member 
functions and
static member functions? 

12.               What is the4 difference between delete[] 
and delete? 

13.               Question on Copy constructor. 

14.               What are namespaces? 

15.               One question on namespace. 

16.               What are pass by valu and pass by 
reference?
what is the disadvantage of pass by value?
I didnt get this. if you have the answer plz tell me. 

17.               How to invoke a C function using a C++ 
program? 

18.               char *str;
char *str1="Hello World";
sscanf(str1,"%s",str);
what is the output? 

19.               Difference between function overloading 
and function overriding. 

20.               There is a base class sub, with a member 
function fnsub(). There are
two classes super1 and super2 which are subclasses of the 
base class sub.
if and pointer object is created of the class sub which 
points to any
of the two classes super1 and super2, if fnsub() is called 
which one
will be inoked? 

ALTER  placement papers