C test paper -- 1

Instructions:
1. Please ignore any case-sensitive errors and un-included libraries.

2. Time duration : 30 min.

Q1.
main( )
{
int i;
clrscr();
printf("%d", &i)+1;
scanf("%d", i)-1;
}
a. Runtime error.                                 b. Runtime error. Access violation.
c. Compile error. Illegal syntax           d. None of the above

Q2.
#define  POWER(A)  A * A * A                              

main( )
{
 printf("%d", 245/POWER(10+5));
}
a. error             b. 2                  c. 19                d. none of the above

Q3.
union u
{
 struct st
{
 int i = 4;
 int j = 4;
 int k = 4;
 int l;
}st;
int i;
}u;
main( )
{
 u.i = 100;
 printf("%d, %d, %d",u.i, u.st.i, u.st.l);
}
a. 4, 4, 0                      b. 0, 0, 0                      c. 100, 4, 0                  d. 40, 4, 0

Q4.
main( )
{
 int i, j, *p;
 i = 25;
 j = 100;
 p = &i; // Address of i is assigned to pointer p
 printf("%f", i/(*p) ); // i is divided by pointer p
}
To execute it correctly, what changes can we make in the statement : i/(*p) ?
a. Runtime error.                     b. 1.00000                   c. Compile error                      d. 0.00000

Q5.
main( )
{
 char *p = "hello world";
 p[0] = 'H';
 printf("%s", p);
}
a. Runtime error.                     b. Hello world             c. Compile error          d. hello world

Q6. How will you print % character?

a. printf("%)             b. printf("\%)            c. printf("%% )                        d. printf("\%% )

Q7.
const int perplexed = 2;
#define perplexed 3

main( )
{
 #ifdef perplexed
 #undef perplexed
 #define perplexed 4
 #endif
 printf("%d",perplexed);
}
a. 0                  b. 2                  c. 4                  d. none of the above

Q8.
struct Foo
{
 char *pName;
};
main( )
{
 struct Foo *obj = malloc(sizeof(struct Foo));
 clrscr();
 strcpy(obj->pName,"Your Name");
 printf("%s", obj->pName);
}
a. Your Name              b. compile error                       c. Name           d. Runtime error

Q9.
struct Foo
{
 char *pName;
 char *pAddress;
};
main( )
{
 struct Foo *obj = malloc(sizeof(struct Foo));
clrscr();
 obj->pName = malloc(100);
 obj->pAddress = malloc(100);

strcpy(obj->pName,"Your Name");
 strcpy(obj->pAddress, "Your Address");

free(obj);
 printf("%s", obj->pName);
 printf("%s", obj->pAddress);
}
a. Your Name, Your Address                         b. Your Address, Your Address
c. Your Name Your Name                              d. None of the above

Q10.
main( )
{
 char *a = "Hello ";
 char *b = "World";
clrscr();
 printf("%s", strcat(a,b));
}
a. Hello                        b. Hello World                        c. HelloWorld             d. None of the above

Q11.

main( )
{
 char *a = "Hello ";
 char *b = "World";
 clrscr();
 printf("%s", strcpy(a,b));
}
a. Hello                     b. Hello World         c. World       d. None of the above

Q12.
main( )
{
 printf("%d, %d", sizeof('c'), sizeof(100));
}
a. 2, 2                          b. 2, 100                                  c. 4, 100                                  d. 4, 4

Q13.
main( )
{
 int i = 100;
 clrscr();
 printf("%d", sizeof(sizeof(i)));
}
a. 2                              b. 100                          c. 4                              d. none of the above

Q14.

main( )
{
 int c = 5;
 printf("%d", main||c);
}
a. 1                  b. 5                  c. 0                  d. none of the above

Q15.
main( )
{
 int i =10, j = 20;
 clrscr();
 printf("%d, %d, ", j-- , --i);
 printf("%d, %d ", j++ , ++i);
}
a. 20, 10, 20, 10                      b. 20, 9, 20, 10            c. 20, 9, 19, 10                        d. 19, 9, 20, 10

Q16.
main( )
{
 int x=5;

for(;x!=0;x--) {
 printf("x=%d", x--);
 }
}
a. 5, 4, 3, 2,1                           b. Lvalue required       c. 5, 3, 1                      d. Infinite Loop

17.
main( )
{
int A=6;
switch(A)
{ default : A+=2;
case 4: A=4;
case 5: A++;
break;
}
printf("\n A = %d",A);
}
a)8                   b)6                   c)5                   d)4                    

Q18.

#define INC(X) X++
main( )
{
int X=4;
printf("%d",INC(X++));
}
 a)4                  b)5                  c)6                   d)compilation error error

Q19. What is the output ?

main( )

{

    char i;

    clrscr( );

    for(i=120;i<=128;i++)

   {

         printf("%d ",i);

   }

    getch( );

}

Q20. What is the output ?

extern int j;

void main( )

{

    int i=0;

    clrscr( );

    for(i=0;i<=2;i+=1)   {

         j=5;

         printf(" %d ",j);

         j++;    }

    getch( ); }