C Miscellaneous - C Programming MCQ Questions and Answers

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41.
Determine Output:
void main()
{
      char *p;
      p="%d\n";
      p++;
      p++;
      printf(p-2, 300);
}

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42.
Determine Output:
void main()
{
      int c[] = {2.8,3.4,4,6.7,5};
      int j, *p=c, *q=c;
      for(j=0;j<5;j++){
            printf(" %d ", *c);
            ++q;
      }
      for(j=0;j<5;j++){
            printf(" %d ", *p);
            ++p;
      }
}

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43.
Determine Output:
void main()
{
      int a[] = {10,20,30,40,50}, j, *p;
      for(j=0; j<5; j++){
            printf("%d" ,*a);
            a++;
      }
      p = a;
      for(j=0; j<5; j++){
            printf("%d" ,*p); 
            p++;
      }
}

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44.
Determine Output:
#include<stdio.h>
void main()
{
      char s[]={'a','b','c','n','c','\0'}; 
      char *p, *str, *str1; 
      p=&s[3]; 
      str=p;
      str1=s;
      printf("%c", ++*p + ++*str1-32);
}

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45.
Determine Output:
void main()
{
      static char *s[] = {"black", "white", "yellow", "violet"};
      char **ptr[] = {s+3, s+2, s+1, s}, ***p;
      p = ptr;
      ++p; 
      printf("%s",*--*++p + 3); 
}

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46.
What will be the output of the following C code?
#include<stdio.h>
main()
{
    int n;
    n=f1(4);
    printf("%d",n);
}
f1(int x)
{
    int b;
    if(x==1)
        return 1;
    else
        b=x*f1(x-1);
        return b;
}

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50.
Suppose we have: int a=100; (signed by default).
If we want to convert this to an unsigned long integer, we can do this by making the following small change:

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