92. A solution to the problem of indefinite blockage of low – priority processes is : a. b.
| 91. | ‘Aging‘ is : |
|---|---|
| b. | keeping track of what pages are currently residing in memory |
| c. | keeping track of how many times a given page is referenced |
| d. | increasing the priority of jobs to ensure termination in a finite time |
Similarly one may ask, what is starvation OS?
Starvation is the problem that occurs when high priority processes keep executing and low priority processes get blocked for indefinite time. In heavily loaded computer system, a steady stream of higher-priority processes can prevent a low-priority process from ever getting the CPU.
In respect to this, why aging is useful in OS?
Aging is used to ensure that jobs with lower priority will eventually complete their execution. This technique can be used to reduce starvation of low priority tasks.
What is paging in OS?
In computer operating systems, memory paging is a memory management scheme by which a computer stores and retrieves data from secondary storage for use in main memory. In this scheme, the operating system retrieves data from secondary storage in same-size blocks called pages.
What is FIFO algorithm in OS Mcq?
The simplest page-replacement algorithm is a FIFO algorithm. The first-in, first-out (FIFO) page replacement algorithm is a low-overhead algorithm that requires little bookkeeping on the part of the operating system. In simple words, on a page fault, the frame that has been in memory the longest is replaced.
What is interprocess communication Mcq?
This set of Operating System Multiple Choice Questions & Answers (MCQs) focuses on “Inter Process Communication”. … Explanation: Interprocess Communication allows processes to communicate and synchronize their actions.
Which is the most optimal scheduling algorithm Mcq?
Discussion Forum
| 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 |
How starvation is avoided in OS?
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.
What is deadlock how it occurs?
A deadlock occurs when the first process locks the first resource at the same time as the second process locks the second resource. The deadlock can be resolved by cancelling and restarting the first process.
What is semaphore explain with example?
Semaphore is simply a variable that is non-negative and shared between threads. A semaphore is a signaling mechanism, and a thread that is waiting on a semaphore can be signaled by another thread. It uses two atomic operations, 1)wait, and 2) signal for the process synchronization. … Example of Semaphore.
What are three requirements of any solution to the critical section problem?
Three must rules which must enforce by critical section are : 1) Mutual Exclusion 2) Process solution 3)Bound waiting.
What is the drawback of Banker’s algorithm?
Disadvantages of the Banker’s Algorithm
It requires the number of processes to be fixed; no additional processes can start while it is executing. It requires that the number of resources remain fixed; no resource may go down for any reason without the possibility of deadlock occurring.