WGU - C191
1. What is the role of the OS?: To manage a computer's hardware
2. Which OS service provides functions that are helpful to the user?: Program execution
3. Which system call is used for device manipulation?: ReadConsole()
4. Which system calls can be grouped under the category of process con- trols?: Allocate, free memory
5. Which service function is responsible for identifying and correcting excep- tions such as the lack of paper in a
printer?: Error detection
6. Which type of OS service uses the CLI?: User interface
7. What represents layer zero (0) in the layered approach?: Hardware
8. What is a disadvantage of booting an OS stored in ROM?: Changing a bootstrap requires new hardware
chips.
9. What is a valid process state?: Waiting
10.What are two valid components of a process control block (PCB)?: The process counter & The process
state
11.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.
12.Which advantage does short-term scheduling have compared with long-term scheduling?: It takes less
time to select a process to execute next.
13.What is considered stable when the average rate of process creation is equal to the average departure
rate
of processes leaving the system?: The degree of multiprogramming
14.Which action allows an application that is in the background to be passed to the foreground and vice versa?:
Memory reload
15.What is the process of context switching?: Performing a state save and a state restore
16.Which features are included in the DTrace tool?: Compiler, providers of probes, and consumers
17.What is the difference between cooperative and preemptive scheduling?-
: Cooperative scheduling occurs when a process terminates, whereas preemptive scheduling occurs when a process initiat
18.Which scheduling criteria measures the number of processes completed per time unit?: Throughput
19.Which criterion attempts to keep the processor as busy as possible?: CPU utilization
20.When does starvation occur in the priority scheduling algorithm?: When a process is waiting indefinitely
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1. What is the role of the OS?: To manage a computer's hardware
2. Which OS service provides functions that are helpful to the user?: Program execution
3. Which system call is used for device manipulation?: ReadConsole()
4. Which system calls can be grouped under the category of process con- trols?: Allocate, free memory
5. Which service function is responsible for identifying and correcting excep- tions such as the lack of paper in a
printer?: Error detection
6. Which type of OS service uses the CLI?: User interface
7. What represents layer zero (0) in the layered approach?: Hardware
8. What is a disadvantage of booting an OS stored in ROM?: Changing a bootstrap requires new hardware
chips.
9. What is a valid process state?: Waiting
10.What are two valid components of a process control block (PCB)?: The process counter & The process
state
11.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.
12.Which advantage does short-term scheduling have compared with long-term scheduling?: It takes less
time to select a process to execute next.
13.What is considered stable when the average rate of process creation is equal to the average departure
rate
of processes leaving the system?: The degree of multiprogramming
14.Which action allows an application that is in the background to be passed to the foreground and vice versa?:
Memory reload
15.What is the process of context switching?: Performing a state save and a state restore
16.Which features are included in the DTrace tool?: Compiler, providers of probes, and consumers
17.What is the difference between cooperative and preemptive scheduling?-
: Cooperative scheduling occurs when a process terminates, whereas preemptive scheduling occurs when a process initiat
18.Which scheduling criteria measures the number of processes completed per time unit?: Throughput
19.Which criterion attempts to keep the processor as busy as possible?: CPU utilization
20.When does starvation occur in the priority scheduling algorithm?: When a process is waiting indefinitely
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