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Introduction to Operating Systems Lecture 3: Scheduling

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Introduction to Operating Systems Lecture 3: Scheduling

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Questions and Answers

What is the role of the short-term scheduler (CPU scheduler)?

Handling the allocation of long-term memory for processes

Managing the input/output operations of the processes

Distributing the CPU time equally among all processes

Selecting the next process to execute based on priorities (correct)

What is the role of the dispatcher in the context of scheduling?

Preparing the chosen process for execution and starting it (correct)

Allocating resources for long-term storage of processes

Monitoring the overall performance of the operating system

Handling the communication between different processes

What is the function of the priority function in scheduling?

Manages the storage of files in secondary memory

Handles the communication between hardware and software components

Determines the current priority of a process given its parameters and system state (correct)

Monitors the network traffic within the operating system

What is the decision mode involved in scheduling to 'break ties' when priority functions yield the same value for multiple processes?

Arbitration rule Signup and view all the answers

In which scheme does a process execution continue until it 'voluntarily' gives up the processor by termination or blocking?

Nonpreemptive scheme Signup and view all the answers

What is the role of the preemptive scheme in scheduling?

Allows stopping a process's execution to allocate CPU to a higher (or equal) priority process Signup and view all the answers

Which component of priority classifies processes with respect to their importance or 'niceness'?

External priority Signup and view all the answers

What is the time interval allocated to a process that has passed called?

Waited time Signup and view all the answers

In systems with dynamic priorities, what is possible with regards to process priority in ready state?

Increase in another process priority above the priority of the process currently executed Signup and view all the answers

What is the percentage of time with CPU allocated to a process known as?

Processor utilization Signup and view all the answers

What is the total time from admission (attained service + waited + resource request service time) referred to as?

Real time in system Signup and view all the answers

Which of these represents a non-preemptive scheduling algorithm?

LCFS Signup and view all the answers

What does SJF stand for in non-preemptive scheduling algorithms?

Shortest Job First Signup and view all the answers

Which parameter does the priority function use that represents the time before which the process must finish execution in real-time systems?

Time to deadline Signup and view all the answers

In non-preemptive scheduling algorithms, which ability refers to task execution time not drastically increasing with system load, from the user's point of view?

Predictability Signup and view all the answers

What does FCFS stand for in non-preemptive scheduling algorithms?

First Come First Served Signup and view all the answers