C. reading program questions during the interview

C. reading program question ZZ during the interview
Shury published on 17:50:00

What will print out?
Main ()
{
Char * P1 = "name ";
Char * P2;
P2 = (char *) malloc (20 );
Memset (P2, 0, 20 );
While (* P2 ++ = * P1 ++ );
Printf ("% Sn", P2 );

}

Answer: empty string.

What will be printed as the result of the Operation below:

Main ()
{
Int x = 20, y = 35;
X = y ++ x ++;
Y = ++ y ++ X;
Printf ("% d % DN", x, y );
}

Answer: 5794

What will be printed as the result of the Operation below:

Main ()
{
Int x = 5;
Printf ("% d, % d, % DN", x, x <2, x> 2 );
}

Answer: 5, 20, 1

What will be printed as the result of the Operation below:

# Define swap (A, B) A = a + B; B = A-B; A = A-B;
Void main ()
{
Int x = 5, y = 10;
Swap (x, y );
Printf ("% d % DN", x, y );
Swap2 (x, y );
Printf ("% d % DN", x, y );
}

Int swap2 (int A, int B)
{
Int temp;
Temp =;
B =;
A = temp;
Return 0;

}

Answer: 10, 5
10, 5

What will be printed as the result of the Operation below:

Main ()
{
Char * PTR = "Cisco Systems ";
* PTR ++; printf ("% Sn", PTR );
PTR ++;
Printf ("% Sn", PTR );
}

Answer: Cisco Systems
ISCO Systems

What will be printed as the result of the Operation below:

Main ()
{
Char S1 [] = "Cisco ";
Char S2 [] = "systems ";
Printf ("% s", S1 );
}
Answer: Cisco

What will be printed as the result of the Operation below:

Main ()
{
Char * P1;
Char * P2;
P1 = (char *) malloc (25 );
P2 = (char *) malloc (25 );

Strcpy (P1, "Cisco ");
Strcpy (P2, "systems ");
Strcat (P1, P2 );

Printf ("% s", P1 );

}

Answer: ciscosystems

The following variable is available in file1.c, who can access it? :

Static int average;

Answer: all the functions in the file1.c can access the variable.

What will be the result of the following code?

# Define true 0 // some code
While (true)
{

// Some code

}

Answer: This will not go into the loop as true is defined as 0.

What will be printed as the result of the Operation below:

Int X;
Int modifyvalue ()
{
Return (x + = 10 );
}
Int changevalue (int x)
{
Return (x + = 1 );
}

Void main ()
{
Int x = 10;
X ++;
Changevalue (X );
X ++;
Modifyvalue ();
Printf ("first output: % DN", X );

X ++;
Changevalue (X );
Printf ("second output: % DN", X );
Modifyvalue ();
Printf ("third output: % DN", X );

}

Answer: 12, 13, 13

What will be printed as the result of the Operation below:

Main ()
{
Int x = 10, y = 15;
X = x ++;
Y = ++ y;
Printf ("% d % DN", x, y );
}

Answer: 11, 16

What will be printed as the result of the Operation below:

Main ()
{
Int A = 0;
If (A = 0)
Printf ("Cisco systemsn ");
Printf ("Cisco systemsn ");
}

Answer: two lines with "Cisco Systems" will be printed.