WGU - C191 QUESTIONS AND ANSWERS
LATEST UPDATE
What is the role of the OS?
To manage a computer's hardware
Which OS service provides functions that are helpful to the user?
Program execution
Which OS service provides functions that are helpful to the user?
Program execution
Which system call is used for device manipulation?
ReadConsole()
Which system calls can be grouped under the category of process controls?
Allocate, free memory
Which service function is responsible for identifying and correcting exceptions
such as the lack of paper in a
printer?
Error detection
Which type of OS service uses the CLI?
User interface
What represents layer zero (0) in the layered approach?
Hardware
What is a disadvantage of booting an OS stored in ROM?
Changing a bootstrap requires new hardware chips.
What is a valid process state?
Waiting
What are two valid components 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 processes 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?
Memory reload
LATEST UPDATE
What is the role of the OS?
To manage a computer's hardware
Which OS service provides functions that are helpful to the user?
Program execution
Which OS service provides functions that are helpful to the user?
Program execution
Which system call is used for device manipulation?
ReadConsole()
Which system calls can be grouped under the category of process controls?
Allocate, free memory
Which service function is responsible for identifying and correcting exceptions
such as the lack of paper in a
printer?
Error detection
Which type of OS service uses the CLI?
User interface
What represents layer zero (0) in the layered approach?
Hardware
What is a disadvantage of booting an OS stored in ROM?
Changing a bootstrap requires new hardware chips.
What is a valid process state?
Waiting
What are two valid components 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 processes 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?
Memory reload
