GIOS P2L1 - Part 2

What is the role of the CPU scheduler?

• To manage how processes use the CPU resources

• To deliver I/O requests to the appropriate queue

• To establish communication channels between processes

• To allocate memory for shared IPC

What does the CPU scheduler determine?

• Which process will use the CPU next and how long it will run

• Which process will be moved to the I/O queue

• Which process will be terminated

• Which process will be allocated more memory

What does it mean for the operating system to preempt a process?

• To interrupt the current process and save its context

• To terminate the current process

• To allocate more CPU resources to the current process

• To move the current process to the I/O queue

What is the purpose of the CPU scheduler?

• To make scheduling decisions and dispatch processes

• To calculate CPU efficiency

• To manage I/O requests

• To allocate memory for processes

What is the measure of CPU efficiency?

• Amount of time spent executing a process divided by total computation time

• Amount of time spent scheduling divided by total computation time

• Amount of time spent executing a process divided by total scheduling time

• Amount of time spent scheduling divided by total scheduling time

How does the length of a process affect CPU efficiency?

• A longer process can increase CPU efficiency

• A shorter process can increase CPU efficiency

• The length of a process has no impact on CPU efficiency

• CPU efficiency is only determined by scheduling decisions

What is a timeslice?

• The amount of time allocated to a process scheduled to run

• The amount of time spent scheduling a process

• The amount of time a process spends in the I/O queue

• The amount of time a process spends in the ready state

What are important design decisions when designing a scheduler?

• Appropriate timeslice values and criteria for selecting the next process

• Appropriate timeslice values and I/O queue management

• Criteria for selecting the next process and memory allocation

• Memory allocation and I/O queue management

What happens when a process makes an I/O request?

• The process is moved to the I/O queue and remains there until the request is responded to

• The process is terminated and removed from the ready queue

• The process is immediately scheduled on the CPU

• The process is moved to the I/O queue and then dispatched

What are inter process mechanisms (IPCs)?

• Mechanisms that allow processes to talk to one another

• Mechanisms that manage CPU resources

• Mechanisms that allocate memory for processes

• Mechanisms that handle I/O requests