ITE 272 FINAL EXAM WITH ANSWERS

ITE 272 FINAL EXAM WITH ANSWERS systems architecture - CORRECT ANSWER-the structure, interaction and technology of computer components goals/tradeoffs of data representation - CORRECT ANSWERCARES operating systems - CORRECT ANSWER-a collection of utility programs for supporting users and application programs, allocating resources to multiple users and application programs, and controlling access to hardware purpose of operating systems - CORRECT ANSWER-software that manages computer hardware and software resources and provides common services for computer programs responsibilities of operating systems - CORRECT ANSWERperform basic tasks, prevent interference, provide a software platform operating system management functions - CORRECT ANSWER-management of cpu, memory, processes, secondary storage i/o devices, users operating system layers - CORRECT ANSWER-kernel, service layer, command layer, application layer kernel - CORRECT ANSWER-manages resources and interacts with hardware service layer - CORRECT ANSWER-contains reusable components; acts as intermediary between programs command layer - CORRECT ANSWER-the user interface application layer - CORRECT ANSWER-interconnection layer that includes communication protocols multitasking resource allocation - CORRECT ANSWER-the OS takes what it needs and everything else is available for the other process resource allocation goals - CORRECT ANSWER-meet each program's resource needs, prevent program interference, use hardware and other resources efficiently resource allocation functions - CORRECT ANSWER-schedule resources based on allocation policies and meet current and anticipated needs, update records instantly real resources - CORRECT ANSWER-a computer's physical devices and associated system software that physically exists virtual resources - CORRECT ANSWER-resources (hardware and system software) that are apparent to a user or program as being available but don't necessarily physically exist process management - CORRECT ANSWER-allow the OS to keep track of many different processes running at the same time threads - CORRECT ANSWER-a portion of process that can be scheduled and executed independently CPU allocation - CORRECT ANSWER-a thread controls a CPU for no more than a few milliseconds before it relinquishes control and the OS gives another thread a turn ready state - CORRECT ANSWER-threads are idled; pending availability of a CPU running - CORRECT ANSWER-a thread retains control of a CPU until: the thread terminates or an interrupt occurs interrupt processing - CORRECT ANSWER-how the CPU handles interrupts and what happens to threads or processes that are being executed preemptive scheduling - CORRECT ANSWER-a thread can be removed voluntarily from the running state priority-based scheduling - CORRECT ANSWER-determines which ready thread should be dispatched to the CPU according to: first come first served, explicit authority, shortest time remaining real-time scheduling - CORRECT ANSWER-guarantees a minimum amount of CPU time to a thread if the thread makes an explicit real-time scheduling request when its created single-tasking memory allocation - CORRECT ANSWER-a memory allocation diagram, or memory map, shows physical memory as an array of addresses, with the lowest memory address at the bottom and the highest memory at the top multitasking memory allocation - CORRECT ANSWER-the OS finds free memory regions in which to load new processes and reclaims memory when processes terminate