18 Questions
What is the primary purpose of the medium-term scheduler?
To reduce the degree of multiprogramming
What information is stored in the process control block (PCB) during a context switch?
The value of the CPU registers, the process state, and memory-management information
What is the purpose of a context switch?
To save the state of the current process and load the state of a new process
What is the relationship between the CPU registers and the process context?
The CPU registers are used to store the current state of the process
What is the purpose of saving the current context when an interrupt occurs?
To allow the system to restore the context when the interrupt processing is complete
How does the medium-term scheduler handle changes in memory requirements?
By suspending and resuming processes as needed
What is the primary purpose of saving the state information when an interrupt occurs?
To allow the process to be continued correctly afterward
Which of the following is NOT part of the information stored in the Process Control Block (PCB)?
Information about the program's output
How does the concept of a 'thread' extend the process concept in modern operating systems?
Threads allow a process to have multiple independent execution paths
What is the primary benefit of having multiple threads within a single process on a multicore system?
It allows the process to run multiple tasks in parallel
What information is included in the PCB to support the memory management of a process?
The value of the base and limit registers, and the page or segment tables
What is the main purpose of saving the state information, including the program counter, when an interrupt occurs?
To allow the process to be continued correctly afterward
What is the key difference between preemptive and nonpreemptive scheduling?
Preemptive scheduling allows the CPU to be taken away from a process before it completes, while nonpreemptive scheduling does not.
What is the main concern highlighted when discussing preemptive scheduling and shared data among processes?
Race conditions can arise when one process is preempted while updating shared data.
What is the role of the dispatcher in CPU scheduling?
Dispatcher is responsible for switching context and jumping to the proper location in the user program.
What aspect of preemptive scheduling causes race conditions with shared data?
Preemption of a process while it is updating shared data.
In the context of scheduling, what does nonpreemptive scheduling imply about a process and the CPU?
Once a process is given the CPU, it will keep it until it voluntarily releases it or terminates.
Which component plays a crucial role in determining which process gets control of the CPU under preemptive scheduling?
Dispatcher
Test your knowledge on nonpreemptive and preemptive scheduling schemes. Understand the concepts of process allocation and CPU release under different scheduling scenarios.
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