Final Exam Questions

1. What are the major differences encountered programming for a UNIX platform as compared to a DOS or a MS Windows platform?
2. Write a code segment that
   • prints out the error number,
   • prints out the system error message string, and
   • exits closing all files
   if a call to sigaction() fails.
3. Choose a system header file and describe its overall function and usage. Turn in a copy of the system header file you chose.
4. Write a program with the fork() function that --
   • First the parent prints "Parent", the parent pid, and child pid.
   • Then the child prints "child", the parent pid, and child pid.
   Regardless of system activity force the order of the output. Actually write this program and turn it in.
5. Many multi-user turnkey systems have used UNIX to support different terminal types. In the class we covered curses. What advantage does a "library" such as curses provide?
6. Assume you are writing a program in which a parent needs to share 1 Mbyte of data with a child process. What approach would you use to do this and why?
7. If a many (1000's) clients needs to transfer 40 bytes of information to a server several times an hour using TCP/IP what protocol and server type would you choose? Why?
8. Write the code segments needed to change a X11 (Xlib or Xt) program with only one window to a program that --
   • Has a half size child window
   • Displays the cursor in the child window as small circle.
   • That writes a red circle at the cursors position when the left mouse button is depressed.
   The location of the red circle(s) does not need to be remembered for an expose event.