WGU C191 Operating Systems for Prog rammers Pre-
Assessment Questions with Comp lete Solution . What is a valid process state? ✔✔Waiting What are two valid componen ts of a process control block (PCB) ✔✔The process counter; The process state What is the difference between kernel and user threads? ✔✔Kernel threads are directly managed by the operating system, whereas user threads are managed without kernel support. Which advantage does short -term scheduling have compared with long -term scheduling? ✔✔It takes less time to select a process to execute next. What is considered stable when the average rate of process creation is equal to the average departure rate of p rocesses leaving the system? ✔✔The degree of multiprogramming Which action allows an application that is in the background to be passed to the foreground and vice versa? ✔✔Context switching What is the process of context switching? ✔✔Performing a stat e save and a state restore Which features are included in the DTrace tool? ✔✔Compiler, providers of probes, and consumers What is the difference between cooperative and preemptive scheduling? ✔✔Cooperative scheduling occurs when a process terminates, w hereas preemptive scheduling occurs when a process initiates. Which scheduling criteria measures the number of processes completed per time unit? ✔✔Throughput Which criterion attempts to keep the processor as busy as possible? ✔✔CPU utilization When d oes starvation occur in the priority scheduling algorithm? ✔✔When a process is waiting indefinitely Which scheduling algorithm was designed especially for time sharing systems? ✔✔Round -robin What is a difference between soft and hard processor affinity? ✔✔Hard affinity specifies a subset of processors on which a process may run, whereas soft affinity leaves the processor selection to the OS. What is an address that is generated by the CPU ? ✔✔A logical address Which general -purpose storage is accessed directly by the CPU? ✔✔The main memory What is a limitation of swapping on mobile systems? ✔✔Applications that fail to free up sufficient memory are terminated. What is the name of the memo ry allocation scheme where the operating system keeps a table of available holes? ✔✔Variable partition What is described as memory allocated from a fixed -size segment consisting of physically contiguous pages? ✔✔Buddy system Which memory management sol ution relocates all available memory into one variable -sized block? ✔✔Compaction What does the 50 -percent rule of memory fragmentation state when allocating additional memory using the first -fit method? ✔✔One-third of all memory may be unused.
Assessment Questions with Comp lete Solution . What is a valid process state? ✔✔Waiting What are two valid componen ts of a process control block (PCB) ✔✔The process counter; The process state What is the difference between kernel and user threads? ✔✔Kernel threads are directly managed by the operating system, whereas user threads are managed without kernel support. Which advantage does short -term scheduling have compared with long -term scheduling? ✔✔It takes less time to select a process to execute next. What is considered stable when the average rate of process creation is equal to the average departure rate of p rocesses leaving the system? ✔✔The degree of multiprogramming Which action allows an application that is in the background to be passed to the foreground and vice versa? ✔✔Context switching What is the process of context switching? ✔✔Performing a stat e save and a state restore Which features are included in the DTrace tool? ✔✔Compiler, providers of probes, and consumers What is the difference between cooperative and preemptive scheduling? ✔✔Cooperative scheduling occurs when a process terminates, w hereas preemptive scheduling occurs when a process initiates. Which scheduling criteria measures the number of processes completed per time unit? ✔✔Throughput Which criterion attempts to keep the processor as busy as possible? ✔✔CPU utilization When d oes starvation occur in the priority scheduling algorithm? ✔✔When a process is waiting indefinitely Which scheduling algorithm was designed especially for time sharing systems? ✔✔Round -robin What is a difference between soft and hard processor affinity? ✔✔Hard affinity specifies a subset of processors on which a process may run, whereas soft affinity leaves the processor selection to the OS. What is an address that is generated by the CPU ? ✔✔A logical address Which general -purpose storage is accessed directly by the CPU? ✔✔The main memory What is a limitation of swapping on mobile systems? ✔✔Applications that fail to free up sufficient memory are terminated. What is the name of the memo ry allocation scheme where the operating system keeps a table of available holes? ✔✔Variable partition What is described as memory allocated from a fixed -size segment consisting of physically contiguous pages? ✔✔Buddy system Which memory management sol ution relocates all available memory into one variable -sized block? ✔✔Compaction What does the 50 -percent rule of memory fragmentation state when allocating additional memory using the first -fit method? ✔✔One-third of all memory may be unused.
