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MCQ related to Object Oriented programming using C++ for general use and also for job preparation of Public Service Commission
#include ‘’iostream.h’’
int a(int m)
{ return ++m; }
int b(int &m)
{ return ++m; }
int c(char &m)
{ return ++m; }
void main( )
{
int p=0, q=0 , r=0;
p+=a (b(p));
q+ =b(a (q));
r+=a (c(r));
cout <<p<<q<<r;
}
If the statement:
q+=b(a(q)): is replaced by the statement
q+=b(a(p)); then the above program:
|
Option 1
|
Prints 111 |
|
Option 2
|
Results in compilation error |
|
Option 3
|
Prints 322 |
|
Option 4
|
Prints 352 |
the following program
class abc ;
class def
{
int i1; // statement 1
protected: int i2; // statement 2
public : int i3; // statement 3
friend abc;
} ;
class abc
{
public:
void main (def A)
{
cout<<( A.i1=3) ;
cout<<( A.i2=4);
cout<<( A.i3=5);
}
void main ( )
{
def x1;
abc x2;
x2.mn(x1) ;
}
|
Option 1
|
Will compile successuflly if statement 1 is removed |
|
Option 2
|
Will compile successfully if statement 2 is removed |
|
Option 3
|
Will compile successfully if statement 3 is removed |
|
Option 4
|
Will run successfully and print 345 |
class mho
{ public:
mho(void)
{
cout<< “there was“ ;
}
mho(mho &x }
{
cout<< “a certain man“ ;
}
mho operator - ( mho y)
{
mho ohm;
return (ohm) ;
}
};
If the function main is coded as
mho a, b;
the output will be
|
Option 1
|
there was there was |
|
Option 2
|
nothing |
|
Option 3
|
a run time error |
|
Option 4
|
there was a certain man there was a certain man |
