Consider the following code snippet: waitpid(-1, &status, 0); Which of the following correctly describes the purpose of this code snippet? O it is equivalent to wait(&status); it causes the parent process to wait for the child process that terminates first and fetch that child's termination status it causes the parent process to wait for the child process whose pid is -1 and fetch that child's termination status The first two choices are both correct O None of the above choices are correct Which of the following statements about wait(2) and waitpid(2) are true? The waitpid(2) function can block the caller until a child process terminates, whereas wait(2) has an option that prevents it from blocking. The wait(2) function doesn't wait for the child that terminates first; it has a number of options that control which process it waits for. If a child has already terminated and is a zombie, wait(2) returns immediately with that child's status. Otherwise, it blocks the caller until a child terminates. O All of the above. None of the above.

Modify your program from week 5 so that the program utilizes object-oriented programming to create an application which allows the user to create, delete or modify orders. Your program should do the following in order: Define a class and class variables Create a function to set the order amount Set order amount Create a function to set order type Set order type Create a function to set the order number Set order number Create a function to get the order amount Return the order amount Create a function to get the order type Return the order type   Create a function to get the order number Return the order number   Modify the function to display the order menu Display a menu so that the user can select 1 of 6 options: Add Order Delete Order Edit Order Display Order Save Order Exit the Program Create a new function to save the order items added to the list in a text file. Repeatedly execute the menu selections unit the user enters 6 to exit the program.

4. In a try/catch construct when there is an exception, after the catch executes A. the program resumes at the statement immediately following the try/catch construct B. the program terminates C. the program resumes at the first statement of the try D. the program resumes at the statement following the statement in which the exception occurred

Semaphores: Select all of the following statements that are true. The operations P (Test) and V (Signal) can be interrupted. The operations P (Test) and V (Signal) run in the operating system's user mode. The values of binary semaphores are restricted to 0 and 1. Counting semaphores are used to manage limited resources and the corresponding access to them. Semaphores can be used to synchronize certain operations between processes. When accessing the list of a semaphore, the FIFO principle should be preferred to the LIFO principle.