MCQ on C

What is the output of this C code?

1.     #include <stdio.h>

2.     int main()

3.     {

4.         int i = 0;

5.         int x = i++, y = ++i;

6.         printf("%d % d\n", x, y);

7.         return 0;

8.     }

a) 0, 2
b) 0, 1
c) 1, 2
d) Undefined

What is the output of this C code?

1.     #include <stdio.h>

2.     void main()

3.     {

4.         int x = 97;

5.         int y = sizeof(x++);

6.         printf("X is %d", x);

7.     }

a) X is 97
b) X is 98
c) X is 99
d) Run time error

What is the output of this C code?

1.     #include <stdio.h>

2.     void main()

3.     {

4.         int x = 4, y, z;

5.         y = --x;

6.         z = x--;

7.         printf("%d%d%d", x,  y, z);

8.     }

a) 3 2 3
b) 2 3 3
c) 3 2 2
d) 2 3 4

What is the output of this C code?

1.  #include <stdio.h>

2.     void main()

3.     {

4.         int a = 5, b = -7, c = 0, d;

5.         d = ++a && ++b || ++c;

6.         printf("\n%d%d%d%d", a,  b, c, d);

7.     }

a) 6 -6 0 0
b) 6 -5 0 1
c) -6 -6 0 1
d) 6 -6 0 1


. What is the output of this C code?

1.  #include <stdio.h>

2.     void main()

3.     {

4.         int a = -5;

5.         int k = (a++, ++a);

6.         printf("%d\n", k);

7.     }

a) -4
b) -5
c) 4
d) -3

 What is the difference between the following 2 codes?

1.     #include <stdio.h> //Program 1

2.     int main()

3.     {

4.         int d, a = 1, b = 2;

5.         d =  a++ + ++b;

6.         printf("%d %d %d", d, a, b);

7.     }

1.     #include <stdio.h> //Program 2

2.     int main()

3.     {

4.         int d, a = 1, b = 2;

5.         d =  a++ +++b;

6.         printf("%d %d %d", d, a, b);

7.     }

a) No difference as space doesn’t make any difference, values of a, b, d are same in both the case
b) Space does make a difference, values of a, b, d are different
c) Program 1 has syntax error, program 2 is not
d) Program 2 has syntax error, program 1 is not



What is the output of this C code?

1.     #include <stdio.h>

2.     int main()

3.     {

4.         int a = 1, b = 1, c;

5.         c = a++ + b;

6.         printf("%d, %d", a, b);

7.     }

a) a = 1, b = 1
b) a = 2, b = 1
c) a = 1, b = 2
d) a = 2, b = 2