Starvation or indefinite blocking is phenomenon associated with the Priority scheduling algorithms, in which a process ready to run for CPU can wait indefinitely because of low priority. … As we see in the above example process having higher priority than other processes getting CPU earlier.
Consequently, how can we overcome the starvation problem in CPU scheduling?
A possible solution to starvation is to use a scheduling algorithm with priority queue that also uses the aging technique. Aging is a technique of gradually increasing the priority of processes that wait in the system for a long time.
| Que. | The most optimal scheduling algorithm is : |
|---|---|
| b. | SJF – Shortest Job First |
| c. | RR – Round Robin |
| d. | None of these |
| Answer:SJF – Shortest Job First |
In this manner, which is the best CPU scheduling algorithm?
The FCFS is better for a small burst time. The SJF is better if the process comes to processor simultaneously. The last algorithm, Round Robin, is better to adjust the average waiting time desired. Round Robin quantum time will set it towards more SJF or FCFS value.
What are the two steps of a process execution?
The two steps of a process execution are : (choose two)
- ? I/O Burst, CPU Burst.
- CPU Burst.
- Memory Burst.
- OS Burst.
What are the types of process synchronization?
On the basis of synchronization, processes are categorized as one of the following two types:
- Independent Process : Execution of one process does not affects the execution of other processes.
- Cooperative Process : Execution of one process affects the execution of other processes.
What is round robin algorithm?
Round Robin is a CPU scheduling algorithm where each process is assigned a fixed time slot in a cyclic way. It is simple, easy to implement, and starvation-free as all processes get fair share of CPU. One of the most commonly used technique in CPU scheduling as a core.
What is priority scheduling with example?
Priority Scheduling is a method of scheduling processes that is based on priority. In this algorithm, the scheduler selects the tasks to work as per the priority. The processes with higher priority should be carried out first, whereas jobs with equal priorities are carried out on a round-robin or FCFS basis.
What is the major problem of priority scheduling?
In priority-based scheduling algorithms, a major problem is indefinite block, or starvation. A process that is ready to run but waiting for the CPU can be considered blocked. A priority scheduling algorithm can leave some low-priority processes waiting indefinitely.
What is the major problem of priority scheduling algorithm?
Note: A major problem with priority scheduling is indefinite blocking or starvation. A solution to the problem of indefinite blockage of the low-priority process is aging. Aging is a technique of gradually increasing the priority of processes that wait in the system for a long period of time.
What are the four conditions required for deadlock to occur?
4 Conditions for Deadlock
- mutual exclusion: at least one process must be held in a non-sharable mode.
- hold and wait: there must be a process holding one resource and waiting for another.
- No preemption: resources cannot be preempted.
- circular wait: there must exist a set of processes.
In which algorithm starvation is biggest problem?
Can starvation occur in non preemptive scheduling?
If a process having high priority frequently arrives in the ready queue, low priority process may starve. If a process with long burst time is running CPU, then later coming process with less CPU burst time may starve. It has overheads of scheduling the processes. … It is low in non preemptive scheduling.