WGU C191 Operating systems for programmers, Full Exam Review, Graded A+ 2024

Control Program manages the execution of user programs to prevent errors and improper use of the computer computer system A four-part system consisting of hardware, software, data, and people that performs four basic actions: input, output, processing, and storage. Kernal The part of the operating system that is running at all times on a computer. Middleware Several different types of software that sit between and provide connectivity for two or more software applications Direct Memory Access (DMA) When a device controller transfers an entire block of data from its own buffer storage to memory without CPU intervention Multiprocessor Systems Systems with 2 or more processors in close communication. Three main advantages: 1. Increased throughput 2. Economy of Scale 3. Increased reliability graceful degradation Ability to continue providing service proportional to the level of surviving hardware Fault-tolerant systems system that can suffer a failure of any single component and still continue to operate. Asymmetric Multiprocessing each processor is assigned a specific task Symmetric Multiprocessing (SMP)