Consider a variant of the RR scheduling algorithm where theentries in the ready queue are pointers to the PCBs.a. What would be the effect of putting two pointers to thesame process in the ready queue?b. What would be the major advantages and disadvantagesof this scheme?c. How would you modify the basic RR algorithm to achievethe same effect without the duplicate pointers?

a) The process would be run twice as many times Explanation: In effect, that process will have…

Answered: Consider a variant of the RR scheduling…

Engineering

Computer Science

Consider a variant of the RR scheduling algorithm where the entries in the ready queue are pointers to the PCBs.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

See similar textbooks

Related questions

Q: Queues are useful in situations when O Sorting is required. Elements must be processed right away. O…

A: We are going to understand when queues are useful.

Q: Given that we have the queue class. Write the main program to create a Queue object of type integers…

A: Given that we have a queue class. We have to write the main program to create Queue object of type…

Q: Textbook examples show a task that is waiting at a rendezvous for another task to arrive in a…

A: the answer is given below:-

Q: Java Algorithm Programming Question Implement the ADT queue by using a circular linked list. Recal…

A: ADT stands for abstract data type, which is a type (or class) for objects whose behaviour is…

Q: In asymmetric multiprocessing, the process is taken from the ready queue. Select one: O True O False

A: In asymmetric multiprocessing, the process is taken from the ready queue. Is it T/F ?

Q: Machine organization If the input stream is ZYXWV, create a sequence of pushes and pops such that…

A: Here,we have to create a sequence of PUSH and POP in such a way that the input Stream(PUSH) and…

Q: I have a priority queue with 11 entries stored as a heap in the following array: 3 4 5 7. 9 10 11…

A: As the elements in the priority queue are stored in the form of a min heap, so deleting the head…

Q: Write a Java programming code or Java Program with the following specifications given below: -…

A: import java.util.Stack; import java.util.*; import java.util.Iterator; import java.util.Scanner;…

Q: Discuss the conditions for an overflow and an underflow while insertion anddeletion operations are…

A: A queue may have a limited space depending on the implementation. We must implement check conditions…

Q: In the second phase, the following operations are executed on the stack. push where; top; push…

A: Here, in first step I am providing the specific code for second case. If you want to test it for any…

Q: Given the following queue, which pointer points to the new item when the operation…

A: BElow i have answered:

Q: A SpecialStackTM is a stack modified to support the following two operations: PUSHCLEAR(v)…

A: For the above statment for stack(a) Describe the ordering of values on the stack. (b) Explain how a…

Q: A disk drive has 24 cylinders (0-23). Initially, the head points to cylinder 8 (moving towards cy…

A: Here in this question we have given 24 disk cylinder.currently head pointer is at 8.we have to…

Q: the following operations are conducted on the queue. enqueue that; head; dequeue; tail; enqueue…

A: Given input and operations : enqueue that; head; dequeue; tail; enqueue very; enqueue place; tail;…

Q: Implement a Queue using a vector or the STD ::queue:: class Note the difference in what it takes to…

A: Answer:

Q: What is the time complexity of pushing and popping items to/from a stack containing n items,…

A: Note:-As per policy, we are entitled to answer the first three questions. Stack using linked list:-…

Q: Suppose you have a disk that has 400 cylinders numbered 0 to 399. The disk head is currently at…

A: A scheduling algorithm is a set of rules or policies employed by an operating system to determine…

Concept explainers

Computer Fundamentals

The computer is termed computation. For calculating or computing something the device that has been used is known as the computer. Or we can say that for performing a fast arithmetic operation the device that has been used is a computer. Storing, processing, and retrieving are the main features of a computer. 

Question

Consider a variant of the RR scheduling algorithm where the
entries in the ready queue are pointers to the PCBs.
a. What would be the effect of putting two pointers to the
same process in the ready queue?
b. What would be the major advantages and disadvantages
of this scheme?
c. How would you modify the basic RR algorithm to achieve
the same effect without the duplicate pointers?

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.

Similar questions

1. In a Linked stack implemented using singly linked list with pointer top pointing to top of the stack, which of the following statements, correctly push a node into a non-empty stack? Assume temp is the node to be pushed. temp = top; top->next = temp; %3! top->next = temp; temp = top %3D temp->next = top; top = temp %3D %3D top = temp; temp->next = top 2. You are given pointers to first and last nodes of a singly linked list, which of the following operations are dependent on the length of the linked list? O Insert a new element as a first element Add a new element to the end of the list Delete the first element Delete the last element of the list
Discuss briefly on the following below and mention a real-life application : •Priority Queue with Unsorted List•Priority Queue with Sorted List•Selection-Sort•Insertion-Sort
A palindromic number is a number that stays the same when its digits are reversed. For example, 121 is a palindromic number. Write a C++ program to count the palindromic numbers in a given file. The program must use a stack and a queue to test whether a number is a palindromic number. Implement the stack and queue that the program needs. Both need to store digits. Use the numbers.txt file to test your program
q25
Problem 2. In Project 6 you are required to use pthreads condition variables and mutexes to synchronize accesses to shared variables in your priority queue implementation. Ben Bitdiddle wants to try (on his own) to do it using semaphores instead. As in Project 6, the “next" operation returns the highest-priority item in the queue; if the queue is empty, it blocks until the queue becomes non-empty. The “insert" operation places an item in the queue, and if the queue went from empty to non-empty, it signals any waiting threads. Ben's implementation uses a (global) semaphore to count the number of items in the queue, and uses the Bryant and O'Hallaron "P()" and "V()" wrapper functions (see text) to decrement and increment it. He declares a global sem_t list_size and initializes it with sem_init(&list_size,0,0). The global variable list_head points to the first item in the list and is initially NULL. a. In Ben's first attempt, the pq_next() function does this: P(list_size); // block until…
1. Describe how to implement a queue using two stacks and O(1) additional memory, so that the amortized time for any enqueue or dequeue operation is O(1). The only access you have to the stacks is through the standard subroutines Push and Pop.
Implement a stack S using two queues Q1 and Q2 so that operations PUSH (S,X) and POP(S, Y), where S is supposedly a stack and X is the element to be insertedinto S and Y the element deleted from S, are worked upon by the queues that operatetogether as a stack. Assume that the ADT operations of ENQUEUE, DEQUEUE andEMPTYQUEUE are only available for the queues.Demonstrate the working of your method on a list {a, b, c}, which is to beoperated upon as a stack by the queues Q1 and Q2.
a) Given a typical Queue q with elements [E,D,C,B,A] (where Front/left of Queue at E and Rear/right of Queue at A), determine and list elements of the updated Queue in the similar form (Front/left and Rear/right), after the following execution: q.enqueue( q. dequeue() ) q. enqueue( G ) q.dequeue() b) Given a typical Stack s with elements [T,W,X,Y,Z] (where Top/left of Stack at T) and a typical Queue q with elements [E,D,C,B,A] (where Front/left of Queue at E and Rear/right of Queue at A), determine and list elements of the updated Stack and those of the updated Queue in their similar forms after the following execution: q. enqueue( s.pop() ) s.push( R ) q.enqueue( s. peek () ) s. push( q.dequeue() ) q.enqueue( s. pop() ) OP
A counter automaton is a pushdown automaton that only uses one stack symbol (in additionto the bottom of the stack marker). This means that the stack acts as a simple counter: the push operationincreases the counter, the pop operation decreases it, and you can check if the counter is currently set to 0by looking for the bottom of the stack. In particular, you can not store a string over an arbitrary alphabeton the stack. For example, the automaton for anbn we have seen in class is a counter automaton.Let L = {w ∈{a, b}∗|w contains the same number of symbols a and b}.(2.a) Build a counter automaton accepting the language L. As in Question 1, describe the algorithmused by your automaton, and draw a transition diagram.(2.b) Write down an accepting computation of your automaton on the string abbbabaa.