int main() { FILE *fs, *ft; char c[10]; fs = fopen("s"> int main() { FILE *fs, *ft; char c[10]; fs = fopen("s">
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  • Question
  • If the file 'source.txt' contains a line "Be my friend" which of the following will be the output of below program?
    #include<stdio.h>
    
    int main()
    {
        FILE *fs, *ft;
        char c[10];
        fs = fopen("source.txt", "r");
        c[0] = getc(fs);
        fseek(fs, 0, SEEK_END);
        fseek(fs, -3L, SEEK_CUR);
        fgets(c, 5, fs);
        puts(c);
        return 0;
    }
    


  • Options
  • A. friend
  • B. frien
  • C. end
  • D. Error in fseek();

  • Correct Answer
  • end 

    Explanation
    The file source.txt contains "Be my friend".

    fseek(fs, 0, SEEK_END); moves the file pointer to the end of the file.

    fseek(fs, -3L, SEEK_CUR); moves the file pointer backward by 3 characters.

    fgets(c, 5, fs); read the file from the current position of the file pointer.

    Hence, it contains the last 3 characters of "Be my friend".

    Therefore, it prints "end".


    Input / Output problems


    Search Results


    • 1. What will be the output of the program?
      #include<stdio.h>
      
      int main()
      {
          char *p;
          p="%d\n";
          p++;
          p++;
          printf(p-2, 23);
          return 0;
      }
      

    • Options
    • A. 21
    • B. 23
    • C. Error
    • D. No output
    • Discuss
    • 2. What will be the output of the program?
      #include<stdio.h>
      
      int main()
      {
          printf("%c\n", ~('C'*-1));
          return 0;
      }
      

    • Options
    • A. A
    • B. B
    • C. C
    • D. D
    • Discuss
    • 3. What will be the output of the program?
      #include<stdio.h>
      
      int main()
      {
          FILE *fp;
          unsigned char ch;
           /* file 'abc.c' contains "This is CuriousTab " */
          fp=fopen("abc.c", "r");
          if(fp == NULL)
          {
              printf("Unable to open file");
              exit(1);
          }
          while((ch=getc(fp)) != EOF)
              printf("%c", ch);
      
          fclose(fp);
          printf("\n", ch);
          return 0;
      }
      

    • Options
    • A. This is CuriousTab
    • B. This is
    • C. Infinite loop
    • D. Error
    • Discuss
    • 4. What will be the output of the program if value 25 given to scanf()?
      #include<stdio.h>
      
      int main()
      {
          int i;
          printf("%d\n", scanf("%d", &i));
          return 0;
      }
      

    • Options
    • A. 25
    • B. 2
    • C. 1
    • D. 5
    • Discuss
    • 5. What will be the output of the program?
      #include<stdio.h>
      
      int main()
      {
          FILE *fp;
          char ch, str[7];
          fp=fopen("try.c", "r"); /* file 'try.c' contains "This is Nagpur" */
          fseek(fp, 9L, SEEK_CUR);
          fgets(str, 5, fp);
          puts(str);
          return 0;
      }
      

    • Options
    • A. agpur
    • B. gpur
    • C. Nagp
    • D. agpu
    • Discuss
    • 6. What will be the output of the program?
      #include<stdio.h>
      char *str = "char *str = %c%s%c; main(){ printf(str, 34, str, 34);}";
      
      int main()
      {
          printf(str, 34, str, 34);
          return 0;
      }
      

    • Options
    • A. char *str = "char *str = %c%s%c; main(){ printf(str, 34, str, 34);}"; main(){ printf(str, 34, str, 34);}
    • B. char *str = %c%s%c; main(){ printf(str, 34, str, 34);}
    • C. No output
    • D. Error in program
    • Discuss
    • 7. What will be the output of the program?
      #include<stdio.h>
      
      int main()
      {
          printf("%%%%\n");
          return 0;
      }
      

    • Options
    • A. %%%%%
    • B. %%
    • C. No output
    • D. Error
    • Discuss
    • 8. Assuming, integer is 2 byte, What will be the output of the program?
      #include;
      
      int main()
      {
          printf("%x\n", -1>>1);
          return 0;
      }
      

    • Options
    • A. ffff
    • B. 0fff
    • C. 0000
    • D. fff0
    • Discuss
    • 9. What will be the output of the program?
      #include<stdio.h>
      
      int main()
      {
          unsigned int res;
          res = (64 >>(2+1-2)) & (~(1<<2));
          printf("%d\n", res);
          return 0;
      }
      

    • Options
    • A. 32
    • B. 64
    • C. 0
    • D. 128
    • Discuss
    • 10. What will be the output of the program?
      #include<stdio.h>
      
      int main()
      {
          char c=48;
          int i, mask=01;
          for(i=1; i<=5; i++)
          {
              printf("%c", c|mask);
              mask = mask<<1;
          }
          return 0;
      }
      

    • Options
    • A. 12400
    • B. 12480
    • C. 12500
    • D. 12556
    • Discuss


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