Periodic Test - 4.md

[Periodic Test-4] Solutions

[A]

(1) Hexadecimal values

(2) Integers
 
(3) Signal Handler

(4) sigprocmask;

(5) Complement

[B]

(1) False

(2) True

(3) False

(4) True

(5) True

[C]

THESE QUESTION'S ANSWERS ARE EASILY AVAILABLE ON INTERNET.

[D]

(1)

  #include<stdio.h>

     main()
  {
int a, b, result;
printf("\nEnter the numbers to be multiplied:");
scanf("%d%d", &a, &b);       // a > b
result = 0;
while (b != 0)               // Iterate the loop till b == 0
{
    if (b & 01)               // Bitwise & of the value of b with 01
    {
        result = result + a;  // Add a to result if b is odd .
    }
    a<<=1;                    // Left shifting the value contained in 'a' by 1
                              // Multiplies a by 2 for each loop
    b>>=1;                    // Right shifting the value contained in 'b' by 1.
}
printf("nResult:%d",result);
  }

(2)

  #include<stdio.h>
  #include<conio.h>
  #include<ctype.h>
  void main()
  {
  FILE *f;
  char ch;
  int line=0,word=0;
  clrscr();
  f=fopen("student","w");
  printf("Enter text press ctrol+z to quit\n");
  do
  {
  ch=getchar();
  putc(ch,f);
  }
  while(ch!=EOF);
  fclose(f);
  f=fopen("student","r");
  while((ch=getc(f))!=EOF)
  {
  if(ch=='\n')
  line++;
  if(isspace(ch)||ch=='\t'||ch=='\n')
  word++;
  putchar(ch);
  }
  fclose(f);
  printf("\n no of line=%d\n",line);
  printf("no of word=%d\n",word);
  getch();
  }

(3)

  SIMILAR CODE AVAILABLE IN CHAPTER RELATED TO THIS TOPIC.

(4)

  #include<stdio.h>

  int main() {
FILE *fp1, *fp2;
int ch1, ch2;
char fname1[40], fname2[40];

printf("Enter name of first file :");
gets(fname1);

printf("Enter name of second file:");
  gets(fname2);

  fp1 = fopen(fname1, "r");
  fp2 = fopen(fname2, "r");

if (fp1 == NULL) {
  printf("Cannot open %s for reading ", fname1);
  exit(1);
  } else if (fp2 == NULL) {
  printf("Cannot open %s for reading ", fname2);
  exit(1);
  } else {
  ch1 = getc(fp1);
  ch2 = getc(fp2);

  while ((ch1 != EOF) && (ch2 != EOF) && (ch1 == ch2)) {
     ch1 = getc(fp1);
     ch2 = getc(fp2);
  }

  if (ch1 == ch2)
     printf("Files are identical n");
  else if (ch1 != ch2)
     printf("Files are Not identical n");

  fclose(fp1);
  fclose(fp2);
  }
return (0);
  }