Description
General rules: Create homework, compose specifications using a common document-creation tool, such as Microsoft® Word.
Hints: Refer to the wwweb or lecture notes for this class to answer the questions below. Be concise, complete, and precise.
- Charactrize high-level the Solaris OS State some key advantages of its design.
- Write a concise, complete English description of the C/C++ function system(). Be thorough.
- Write a concise English language description of the C/C++ function fflush().
- Write a concise, complete English language description of the OS command Be thorough but write only few lines of printed text. Also try WHOAMI on MS Windows; describe and document what you observe.
- Write C++ program system1 that calls library function “system()”. Issue 3 distinct calls to system(), each with a single argument: “ls”, “pwd”, and “whoami”. Show the source and all generated outputs. Describe briefly what you observe.
- Write C or C++ program system2 that reads OS commands via command line parameters, and then executes them. The command line parameters must be legal Unix/Linux commands. Print the number of commands entered. To prepare, read about argc, argv, and envp. Focus is only argc and argv. A sample execution by fictitious user “herb$” is:
herb$ ./a.out pwd ls whoami
argc = 4
argv[1] = pwd
Executing command ‘pwd’
/Users/herbertmayer
argv[2] = ls
Executing command ‘ls’
Applications Downloads Music familie test1
Contacts Favorites Pictures herb test1.c
Desktop Library Public pix_low_2020 test2
Documents Movies a.out test.c test2.c
argv[3] = whoami
Executing command ‘whoami’
herbertmayer
- What is an Operating System (OS)? What is it used for? What are the goals of an OS?
- What are 5 key functions and responsibilities of an OS? List, name, and describe them.
- OS commands can be visual or purely textual, or completely graphical. Explain pros and cons. Name a sample OS for both types.
- What is the meaning of Information Hiding? How is this related to OS? State your assessment, regarding OS design.
- Briefly contrast ages, origins, uses of: MS-DOS, Unix BSD, Linux
- Name and briefly outline some ideal, high-level OS design goals.
