RRB JE (IT) : C language + C++ language Quiz 1

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Question 1

The friend functions are used in situations where:

• AWe want to have access to unrelated classes
• BDynamic binding is required
• CExchange of data between classes to take place
• DNone of the above

Question 2

Assume that we have constructed functions for both base class and derived class. Now consider the declaration in main( ). Base ∗ P = New Derived; in what sequence will the constructor be called?

• ADerived class constructor followed by Base class constructed.
• BBase class constructor followed by derived class constructor.
• CBase class constructor will not be called.
• DDerived class constructed will not be called.

Question 3

#include <stdio.h>
int f(char *p)
{
return (printf("%s\n",p));
}
void main(){
char str[20];
printf("Enter a string ");
scanf("%s",str);
printf("result = %d",f(str));
}
If entered string is “coding is good job”, what will be result ,result=?

• A6
• B7
• C18
• D19

Question 4

Match the groups:

• Ai-a, ii-b, iii-c
• Bi-b, ii-c, iii-a
• Ci-c, ii-b, iii-a
• Di-c, ii-a, iii-b

Question 5

What will be output?
#include <stdio.h>
void main(){
int *ptr1,* ptr2, a, b, c, d;
ptr1= (int*) malloc (8);
a=ptr1;
free (ptr1);
b=ptr1;
printf ("%d ,%d ,",ptr1,a-b);
ptr2=(int*) malloc (16);
c=ptr2;
realloc(ptr2,0);
d=ptr2;
printf(" %d, %d ",ptr2,c-d);
}

• Aaddress , 0 ,address , 0
• BNull, address, Null, address
• Caddress, address, address, address
• Daddress, Null, error

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