Which keyword is used to represent identifiers from other programs?

 If there is any error while opening a file, fopen will return? 

How can you read a character from the keyboard and store it in the variable 'a'?

Which of the following class members cannot be accessed using the direct member access operator?

What happens when a null pointer is converted to a boolean?

What is the output of the following C code?

main()

{

char *p="hey matthew",*p1;

p1=p;

while(*p!='\0') ++*p++;

printf("%s %s",p,p1);

}

 What will be the output of the following C code? 

#include <stdio.h>

int main()

{

int x = 10, y = 5, z = 5;

int p;      

 p = x == (y + z);

printf("%d", p);}

}

What will be the output of the following C++ code?

#include <cstdlib>

#include <ctime>

#include <iostream>

using namespace std;

int main()

{

srand((unsigned)time(0));

int ran;

for (int i = 0; i < 2; i++)

{

           ran = (rand() % 10) + 1;

cout << ran;

}

}

Which of the following statements about static variables is correct?

Consider the C functions foo and bar given below:

int foo(int val) { int x = 0; while (val > 0) { x = x + foo(val--); } return val; } int bar(int val) { int x = 0; while (val > 0) { x = x + bar(val-1); } return val; }

Invocations of foo(3) and bar(3) will result in: