What happens when a system has too may I/O bound processes? the I/O devices are very busy, with long waiting times while the CPU is mostly idle it's cool the device waiting queues get very long and new processes are denied service the CPU is very busy, with long waiting times while the IO devices are mostly idle On Unix, when does the exec() system call return? Exec() starts the new program in the background and returns immediately exec() returns when the child program receives a signal exec() always returns after the completion of the program when there is an error with the call parameters, such as an invalid file name Consider a distributed application that runs over a network where requests from many clients must be sent to any one of several identical server processes for execution. A server process executes the request and then sends the results back to the client who sent the request. What is the most effective inter-process communication method suitable for this application? message passing with direct communication shared memory Unix pipes message passing with indirect communication (mailboxes)What happens when a system has too may I/O bound processes? the I/O devices are very busy, with long waiting times while the CPU is mostly idle it's cool the device waiting queues get very long and new processes are denied service the CPU is very busy, with long waiting times while the IO devices are mostly idle On Unix, when does the exec() system call return? Exec() starts the new program in the background and returns immediately exec() returns when the child program receives a signal exec() always returns after the completion of the program when there is an error with the call parameters, such as an invalid file name Consider a distributed application that runs over a network where requests from many clients must be sent to any one of several identical server processes for execution. A server process executes the request and then sends the results back to the client who sent the request. What is the most effective inter-process communication method suitable for this application? message passing with direct communication shared memory Unix pipes message passing with indirect communication (mailboxes)