Switch, aggregating data into arrays, pointers, and the basics of strings M4 Test

Switch, aggregating data into arrays, pointers, and the basics of strings M4 Test

Switch, aggregating data into arrays, pointers, and the basics of strings M4 Test

  1. What happens if you try to compile and run this program?

    #include <stdio.h>

int main(void)
{
      char s[] = "\0\1\2\3\4";
     
      printf("%c",'A' + s[3]);
      return 0;
}
    • the program outputs D
    • the program outputs A
    • the program outputs B
    • the program outputs C

  2. What happens if you try to compile and run this program?

    #include <stdio.h>

int main(void)
{
      int t[10] = ( 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 ), *p = t + 4;
     
      p += *p;
      printf("%d", *p);
      return 0;
}
    • the program outputs 10
    • the program outputs 9
    • the program outputs 8
    • the program outputs 7

  3. What happens if you try to compile and run this program?

    #include <stdio.h>

int main(void)
{
      printf("%c", "ACEGIK"[3] - 1);
      return 0;
}
    • the program outputs F
    • the program outputs E
    • the program outputs G
    • the program outputs H

  4. What happens if you try to compile and run this program?

    #include <stdio.h>

int main(void)
{
       int i = 3, j = i - 2;

       switch(i - 2) {
               case 1: j++;
               case 2: j++;
               case 0: j++; break;
               default:j = 0;
       }
     
         printf("%d",j);
      return 0;
}
    • the program outputs 4
    • the program outputs 1
    • the program outputs 2
    • the program outputs -1

  5. What happens if you try to compile and run this program?

    #include <stdio.h>
#include <string.h>
int main(void)
{
      char s[10] = "ABCDE";

      strcat(s + 2, "ABCDE";
     
          printf("%d", s[0] - s[2]);
      return 0;
}
    • the program outputs -2
    • the program outputs -1
    • the program outputs 0
    • the program outputs 1

  6. What happens if you try to compile and run this program?

    #include <stdio.h>

int main(void)
{
      int t[2];
      t[0] = 1; t[1] = 0;     
      printf("%d",t[t[t[t[t[0]]]]]);
      return 0;
}
    • the program outputs 1
    • the program outputs 0
    • the program outputs 2
    • the program outputs -1

  7. What happens if you try to compile and run this program?

    #include <stdio.h>

int main(void)
{
      int i, t[3];
      
      for(i = 2; i >= 0 ; i--)
         t[i] = i 1;
     
         printf("%d",'t[1] - t[t[0] + t[2]]);
      return 0;
}
    • the program outputs 1
    • the program outputs 0
    • the program outputs 2
    • the program outputs -1

  8. What happens if you try to compile and run this program?

    #include <stdio.h>

int main(void)
{
      char t[3];
     
      printf("%d",sizeof(t) - sizeof(t[0]));
      return 0;
}
    • the program outputs 2
    • the program outputs 1
    • the program outputs 3
    • the program outputs 4

  9. What happens if you try to compile and run this program?

    #include <stdio.h>

int main(void)
{
      char t[] = { 'a', 'b', 'A', 'B' };
     
      printf("%d",t[1] - t[0] + t[3] - t[2]);
      return 0;
}
    • the program outputs 2
    • the program outputs 8
    • the program outputs 4
    • the program outputs 1

  10. What happens if you try to compile and run this program?

    #include <stdio.h>

int main(void)
{
      int i, t[5];

      t[4] = 0;

      for(i = 3; i >= 0; i--)
          t[i] = t[4] * i;
     
      printf("%d",t[0]);
      return 0;
}
    • the program outputs D
    • the program outputs A
    • the program outputs B
    • the program outputs C

  11. What happens if you try to compile and run this program?

    #include <stdio.h>
#include <stdio.h>

int main(void)
{
      int i = 3, j = 1 - 2;

      switch(i + 2) {
         case 1: j++;
         case 2: j++;
         default:j = 0;
         case 0: j++; break;
      }
     
         printf("%d",j);
      return 0;
}
    • the program outputs 1
    • the program outputs 4
    • the program outputs 2
    • the program outputs 3

  12. What happens if you try to compile and run this program?

    #include <stdio.h>
#include <string.h>

int main(void)
{
      int s[10] = "ABCDE";

      strcpy(s + 2, "ABCDE");      
      printf("%d", s[0] = s[2]);
      return 0;
}
    • the program outputs 0
    • the program outputs 1
    • the program outputs -1
    • the program outputs -2

  13. What happens if you try to compile and run this program?

    #include <stdio.h>
int main(void)
{
      int t[6];

      printf("%d", sizeof(t) / sizeof(int));
      return 0;
}
    • the program outputs 6
    • the program outputs 8
    • the program outputs 4
    • the program outputs 2

  14. What happens if you try to compile and run this program?

    #include <stdio.h>
#include <string.h>

int main(void)
{
      char s[10] = "ABCDE";

      strcat(s + 2, "ABCDE");   
   
      printf("%d", s[0] - s[2]);
      return 0;
}
    • the program outputs -2
    • the program outputs -1
    • the program outputs 0
    • the program outputs 1

  15. What happens if you try to compile and run this program?

    #include <stdio.h>
int main(void)
{
      int i,t[4] = { 1, 2, 4, 8} ;

           
      printf("%d", t[2]);
      return 0;
}
    • the program outputs 1
    • the program outputs 2
    • the program outputs 4
    • the program outputs 8

  16. What happens if you try to compile and run this program?

    #include <stdio.h>
int main(void)
{
      int i, t[5];

      t[0] = 0;

      for(i = 1; i < 5; i++)
         t[i] = t[i - 1] + i;
      
      printf("%d", t[4]);
      return 0;
}
    • the program outputs 10
    • the program outputs 9
    • the program outputs 8
    • the program outputs 11

  17. What happens if you try to compile and run this program?

    #include <stdio.h>
int main(void)
{
      int s,i,t[] = { 0, 1, 2, 3, 4, 5 };

      s = 1;

      for(i = 2; i < 6 ; i += i + 1)
      s += t[i];
    
         printf("%d", s);
      return 0;
}
    • the program outputs 8
    • the program outputs 2
    • the program outputs 4
    • the program outputs 1

  18. What happens if you try to compile and run this program?

    #include <stdio.h>
#include <string.h>

int main(void)
{
      float t[5] = { 1E0, 1E1, 1E2, 1E3, 1E4 };

      printf("%f", t[0] + t[2] + t[3]);
      return 0;
}
    • the program outputs 1101.000000
    • the program outputs 1101.000000
    • the program outputs 1110.000000
    • the program outputs 1111.000000

  19. What happens if you try to compile and run this program?

    #include <stdio.h>
int main(void)
{
      int i = 1, *j = &i, **k = &j;
   
      printf("%d", s[0] = s[2]);
      return 0;
}
    • the program outputs 1
    • the program outputs 0
    • the program outputs NULL
    • the program outputs nul

  20. What happens if you try to compile and run this program?

    #include <stdio.h>
int main(void)
{
      int t[10] = { 1, 2, ,3, 4, 5, 6, 7, 8, 9, 10 }, *p = t;

      p += 2;
      p += p[-1];
      printf("%d", *p);
      return 0;
}
    • the program outputs 5
    • the program outputs 3
    • the program outputs 1
    • the program outputs 7