WGU - C191 Exam Study Questions and
Answers 100% Pass
What is the role of the OS? - ANSWER✔✔-To manage a computer's hardware
Which OS service provides functions that are helpful to the user? - ANSWER✔✔-
Program execution
Which OS service provides functions that are helpful to the user? - ANSWER✔✔-
Program execution
Which system call is used for device manipulation? - ANSWER✔✔-ReadConsole()
Which system calls can be grouped under the category of process controls? -
ANSWER✔✔-Allocate, free memory
Which service function is responsible for identifying and correcting exceptions such as
the lack of paper in a
printer? - ANSWER✔✔-Error detection
Which type of OS service uses the CLI? - ANSWER✔✔-User interface
What represents layer zero (0) in the layered approach? - ANSWER✔✔-Hardware
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, What is a disadvantage of booting an OS stored in ROM? - ANSWER✔✔-Changing a
bootstrap requires new hardware chips.
What is a valid process state? - ANSWER✔✔-Waiting
What are two valid components of a process control block (PCB)? - ANSWER✔✔-The
process counter & The process state
What is the difference between kernel and user threads? - ANSWER✔✔-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? - ANSWER✔✔-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 processes leaving the system? - ANSWER✔✔-The degree of multiprogramming
Which action allows an application that is in the background to be passed to the
foreground and vice versa? - ANSWER✔✔-Memory reload
What is the process of context switching? - ANSWER✔✔-Performing a state save and a
state restore
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Answers 100% Pass
What is the role of the OS? - ANSWER✔✔-To manage a computer's hardware
Which OS service provides functions that are helpful to the user? - ANSWER✔✔-
Program execution
Which OS service provides functions that are helpful to the user? - ANSWER✔✔-
Program execution
Which system call is used for device manipulation? - ANSWER✔✔-ReadConsole()
Which system calls can be grouped under the category of process controls? -
ANSWER✔✔-Allocate, free memory
Which service function is responsible for identifying and correcting exceptions such as
the lack of paper in a
printer? - ANSWER✔✔-Error detection
Which type of OS service uses the CLI? - ANSWER✔✔-User interface
What represents layer zero (0) in the layered approach? - ANSWER✔✔-Hardware
Copyright ©SOPHIABENNETT 2025 ACADEMIC YEARALL RIGHTS RESERVED. Page 1/8
, What is a disadvantage of booting an OS stored in ROM? - ANSWER✔✔-Changing a
bootstrap requires new hardware chips.
What is a valid process state? - ANSWER✔✔-Waiting
What are two valid components of a process control block (PCB)? - ANSWER✔✔-The
process counter & The process state
What is the difference between kernel and user threads? - ANSWER✔✔-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? - ANSWER✔✔-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 processes leaving the system? - ANSWER✔✔-The degree of multiprogramming
Which action allows an application that is in the background to be passed to the
foreground and vice versa? - ANSWER✔✔-Memory reload
What is the process of context switching? - ANSWER✔✔-Performing a state save and a
state restore
Copyright ©SOPHIABENNETT 2025 ACADEMIC YEARALL RIGHTS RESERVED. Page 2/8
