COP4600 Operating Systems Questions With 100% Correct Answers.

what are the components that make up a von neumann machine? - •Stored Programs •CPU with Control Unit and Arithmetic/Logic Unit •Memory •Input and Output Architectural Variants (different types of systems) --Single-Processor Systems (1.3.1) -Multiprocessor Systems (1.3.2) -Clustered systems (1.3.3) Virtual computers: Emulation - running code for another kind of computer Virtual computers: Interpretation - running code for a theoretical computer Virtual computers:: virtualization - running a computer on a computer what are the steps in Starting the Computer - -"boot" program is run to load the kernel -The kernel then does everything else - including loading and starting other programs -Programs then become processes and execute from (and only from) main memory Modern systems areorganized around _________ - interrupts what is an interrupt? - stop execution of the running program and transfer control to an interrupt handler what does the interrupt handler do when it finishes execution? - (usually) returns control to the program that was running what two types of interrupt events can be generated by the computer itself? -• Hardware events • Timer events can a program issue an interrupt? - yes, by requesting for system services for the most part, everything the operating system does is in response to a ___________. - interrupt Multiprogramming - scheduling more than one program at once Multitasking - (Interactive Time-Sharing) is multiprogramming with switches frequent enough that users can interact with running programs multitasking requires what type of operating system? - time-shared operating system Programs have to be in ____________ to run - main memory what in a computer system is Input/output? - Everything except the CPU and main memoryhow do CPUs perform I/O? - via device controllers connected to a bus sequential arrays of bytes are also known as __________ - files almost all data on disk are ____________ - files