All Operating System Design -University Question Papers

https://drive.google.com/drive/folders/0Bz9C0ysJZ7PncHZ5cDZrZEdScE0

Assignment No : 06

Assignment No : 06

Q1. What is handheld System ? explain Frame of reference.

Q2. Write Short note on:

   I. UNIX free BSD
   II. ReFS
   III. Embedded System
   IV. Windows Mobile
   V. Microsoft Windows CE
  Vi. Master Slave Processor 


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Assignment No : 05

Assignment No : 05


Q1. What is Mak Utility ? explain with Ex.
Q2. Write Short note on:
     I. grep
     II. egrep
     III. fgrep
     IV. sort
      V. Mork Manager 
     VI. Shim Manager
     VII. Multiprocessor System
     VIII.Real tyime Shedullting 
       IX. Palm O.S
        X. Google Android  
Q3.  What is IPC ? Explain with its all types 

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Assignment No: 04

Q1. Explain IPC

Q2. What is Process Tracing ?

Q3. What is System V IPC?

Q4. Explain Network Communication different technics

Q5.What is Master Slave Processor?

Q6. Explain Tunis System.

Assignment No: 03

Q1. Explain Memory System with Its types

Q2. What is Address Binding ?

Q3. What is Mean by Linking & Loading in memory system?

Q4. Explain Memory management Techniques

Q5. Explain  types of Memory Partitioning

Q6. What is Paging?

Q7. What is Segmentation? Explain Page replacement strategy

Q7. Explain Virtual Memory

PR( 05) Write a program in C++ to create a RAMDRIVE and associate an acyclic directory structure to it. Use this RAMDRIVE to store input, out files to run a calculator program.

cal.c

#include<iostream>
#include<fstream>
#include<sys/types.h>
#include<stdlib.h>

using namespace std;

int main()
{
    int a,b,c,ch;
    FILE *fp;

    // The two numbers are stored in input.txt file

    fp = fopen("/mnt/ramdisk1/input.txt","r");        // Open input.txt file stored in RAMDISK
    fscanf(fp, "%d", &a);   
    fscanf(fp, "%d", &b);
    fclose(fp);                        // Close the file

    fp = fopen("/mnt/ramdisk1/output.txt","w");        // Open (Create if not exist) the output.txt file stored in RAMDISK
    fprintf(fp, "\n Addition: %d", (a+b));            // Write addition in file
    fprintf(fp, "\n Subtraction: %d", (a-b));        // Write subtraction in file
    fprintf(fp, "\n Multiplication: %d", (a*b));        // Write multiplication in file
    fprintf(fp, "\n Division: %d", (a/b));            // Write division in file

    return 0;
}
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 ramdisk.c


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

long long create_ramdisk(void)
{
FILE *fp;
int ch;
long long space = 0;
system("mkdir -p /mnt/ramdisk");
system("/sbin/mke2fs -q /dev/ram");
system("mount /dev/ram /mnt/ramdisk");
system("df /mnt/ramdisk tmp.txt");
fp = fopen("tmp.txt", "r");
if(!fp)
{
printf("Can't open file\n");
return 0;
}
while((ch = fgetc(fp)) != EOF && ch != '\n');
while((ch = fgetc(fp)) != EOF && ch != ' ');
while((ch = fgetc(fp)) != EOF && ch == ' ');
while((ch = fgetc(fp)) != EOF && ch != ' ');
while((ch = fgetc(fp)) != EOF && ch == ' ');
while((ch = fgetc(fp)) != EOF && ch != ' ');
while((ch = fgetc(fp)) != EOF && ch == ' ');
ungetc(ch, fp);
if(feof(fp))
{
printf("Unexpected read\n");
return 0;
}
fscanf(fp, "%lld", &space);
fclose(fp);
remove("tmp.txt");
return space;
}

void remove_ramdisk(void)
{
system("umount /mnt/ramdisk");
}

int main(void)
{
long long space = create_ramdisk();
printf("Ramdisk has %lld bytes free\n", space);
remove_ramdisk();
return 0;
}


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ramdisk.cpp
#include<iostream>

#include<sys/types.h>
#include<stdlib.h>

using namespace std;

main()
{
    int ch;
    do
    {
        cout<<"\n Switch to the Superuser mode for better results.\n";
        cout<<"\n MENU";
        cout<<"\n 1. Check Free Space";  
        cout<<"\n 2. Create RAMDISK";
        cout<<"\n 3. Copy Files to RAMDISK";
        //cout<<"\n 4. Run Calculator program";
        //cout<<"\n 4. See the contents of Output file";
        cout<<"\n 4. Unmount RAMDISK";
        cout<<"\n 5. Exit";

        cout<<"\n\n Enter Your Choice: ";
        cin>> ch;

        switch(ch)
        {
            case 1:
                system("df -h");
                break;
            case 2:
                system("rmdir /mnt/ramdisk1");  
                system("mkdir /mnt/ramdisk1");
                system("chmod 777 /mnt/ramdisk1");
      
                system("mount -t tmpfs -o size=256m tmpfs /mnt/ramdisk1");
                break;
            case 3:
                // copy input.txt and calculator (object file of calculator.cpp) to RAMDISK
                system("cp input.txt /mnt/ramdisk1");      
                system("cp calculator /mnt/ramdisk1");
                cout<<"Files successfully copied to RAMDISK.";
                break;
            /* case 4:
                system("/mnt/ramdisk1/calculator");
                break; */
            case 4:
                system("umount /mnt/ramdisk1");
                break;
            case 5:
                return 0;                  
        }
        cout<<"Do you want to continue? (1/0): ";
        cin>> ch;
   
    } while(ch == 1);  

    return 0;

}