Exercises - SchedulingScore: 7.8/20 3/10 answeredQuestion 4<>Using the priority list T4, T1, T7, T9, T8, T6, T2, T5, T3, schedule the project below with two processors.Task Time RequiredTasks that must be completed firstT16T27T39T410T1T512T1T62T2, T3T76T4, T5T86T5, T6T911T5, T6Task 5 is done by Select an answerstarting at timeTask 8 is done by Select an answerstarting at timeThe finishing time for the schedule isProgress0.

Detailed Analysis of Scheduling the Project with Two Processors This analysis explores how to…

Answered: Exercises - Scheduling Score: 7.8/20…

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

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Question No: 06 This is a subjective question, hence you have to write your answer in the Text-Field given below. Consider P0,P1,P2 are three processes synchronised with semaphores S0=1,S1=0,S2=0 as shown initialised. The table below gives the code of the processes Process PO While (true) { Process PI Process P2 Wait(S2); print 1"; signal(S1), wait(S1); signal(S1); wait(so); print *0"; signal (S1); signal (S2); a If the sequence of processes schedule is P1,P2,P0,P0,P2,P0,P2,P0. What are the values printed? b. If the semaphores are initialised with S0-0,S1=1 ,S2=1. What are the values printed for the above sequence?
Define relocation details.
Q-5: A semaphore for a resource with four channels is defined by the following structure (after multiple operations running for some time ending with the three waits shown below) Process 100: wait( s1); Process 101: Process 105: wait(s); wait(s1); This produces the current values of the semaphore as: semaphore s1 { } value = -3; *list={100, 101, 105) // processes will be awakened in order from left to right Describe how the semaphore value and list change for the following sequences: What is *list and value? What is list and value? What is *list and value? What is list and value? What is list and value? Process 111: signal(sl); Process 91: signal(s1); Process 110: wait(s); Process 95: signal(sl); Process 113: signal(sl); For this does it make sense that Process 105 can execute a signal function? Process 105: signal(sl); What is list and value?
In this project you are to design a process queue that is responsible for handling the process requests coming from different users. You have to take into consideration that users have different levels of privileges and priorities. Each user has an identification number and a password, in addition to process priorities. One good idea is to design the queue using an array or pointers while preserving the first-in first-out concept of the queue. For every process request received, the program should check the privileges of that request and whether it can be moved forward in the queue to be served by the operating system prior to serving the other requests. Using the programming language of your choice (preferably C+), write the process queue that would handle the user request. The program must allow for requests coming from different users or from one user.
Process Scheduling: using C or C++ Design and implement four different schedulers. These include: First-Come, First-Serve (FCFS), Shortest Job First non-preemptive (SJFnp), Shortest Job First preemptive (SJFp), and Predicted Shortest Job First non-preemptive (PSJFnp). Afterwards, you should undertake comparative performance experiments and write a report on how performance is impacted by the policy underlying each scheduling algorithm.
Create a new project named lab6_1. Read the steps for each portion of this lab. Diagram the memory as outlined in the steps (don’t need to turn this part in). Then, write the code to verify your written work. Declare int variables x and y and int* pointer variables p and q. Set x to 2, y to 8, p to the address of x, and q to the address of y. Then print the following information: The address of x (use the address operator) and the value of x. For example, that output statement may look like: cout << "&x = " << &x << ", x = " << x << endl; The value of p and the value of *p. The address of y (use address operator) and the value of y. The value of q and the value of *q. The address of p (not its contents, don’t dereference). The address of q (not its contents, don't dereference). How are the addresses of x, y, p, and q related? List them out and find the distances between each address. You can include these answers in your program as…
Python Language Q2: Ginormous Campus The campus is pretty big. There are n buildings scattered around it, numbered from 0 to n-1. These buildings are so far away from each other that the only way to get from one to another is to take a campus bus. There are m campus bus routes. The i-th one (0 <= i < m) takes you from building u_i to building v_i (but not the other way around). These buses run very frequently. Professor Zingaro is deciding where to hold his CS lectures. He believes a building x is accessible from a building y if you can get from y to x taking at most two buses. For his students’ convenience, he wants to hold his lectures in the most accessible building. Help him out by telling him how many buildings the most accessible building is accessible from. In addition, list all buildings that are the most accessible. Input The first line of the input contains two space-separated integers n and m, denoting the number of buildings and bus routes, respectively. m lines…
Interrupts are system wide events that stop the execution of a currently running process. Examples of interrupts include (but are not limited to) mouse clicks, process termination, key presses, etc. Some interrupts are considered as more important to be handled first then the others. For example, a hardware interrupt such as hard drive read operation has lesser priority than a memory read. In this way, the most appropriate data structure for representing of such events is the priority queue. Demonstrate by writing an algorithm or a flowchart how to insert the following interrupts in a heap so the highest priority element should move out first. Interrupts Priorities INT 0 100 INT 10 51 INT 11 52 INT 21 54
Interrupts are system wide events that stops the execution of a currently running process. Examples of interrupts include (but are not limited to) mouse clicks, process termination, key presses, etc. Some interrupts are considered as more important to be handled first then the others. For example, a hardware interrupt such as hard drive read operation has lesser priority than a memory read. In this way, the most appropriate data structure for representing of such events is the priority queue. Demonstrate by writing an algorithm or a flowchart how to insert the following interrupts in a heap so the highest priority element should move out first. Interrupts Priorities INT 0 100 INT 10 51 INT 11 52 INT 21 54
def update_task(task_list, task_id, task_field, task_update): """ Given * the task list (`task_list`) * the task index that has been selected (`task_id`) * the field of the selected task (`task_field`) * the updated information (`task_update`) Validate the parameters to check for syntax and structure. If all validations passed, return a tuple with a boolean True and the updated task (a dictionary from the `task_list` at the provided `task_id`). Ff validations fail, return a tuple with a boolean False and a string with the task_field that caused the error during validation. """ task_list = input() task_id = input() task_field = input() task_update = input() if task_id is is_valid_index(): if (task_field is in task_list.item()): return True , task_list(task_id) else: return (False , "field") else: return (False, "idx") fields = [ 'name', 'description', 'deadline',…
You are required to make changes in the above programs and introduce the use of compaction where required. Write code to simulate Worst-Fit Algorithm TASK2: DESCRIPTION One of the simplest methods for memory allocation is to divide memory into several fixed-sized partitions. Each partition may contain exactly one process. In this multiple-partition method, when a partition is free, a process is selected from the input queue and is loaded into the free partition. When the process terminates, the partition becomes available for another process. The operating system keeps a table indicating which parts of memory are available and which are occupied. Finally, when a process arrives and needs memory, a memory section large enough for this process is provided. When it is time to load or swap a process into main memory, and if there is more than one free block of memory of sufficient size, then the operating system must decide which free block to allocate. Best-fit strategy chooses the block…
The purpose of this assignment is to give you an opportunity to demonstrate your understanding of the use of lists, dictionaries, importing Python modules, visualizing data analysis, and user experience design. In this exercise, you will use a list to keep track of the results of a dice roll simulation and use dictionaries to help you visualize the results. Using Repl.it or an IDE (e.g. Visual Studio Code) of your choice, create a Python program that allows the user to select the number of dice, and the number of faces per die to roll for a simulation. For example, many board games have the players roll two, six-sided dies, however, some role-playing games may have the players roll more die with more faces. 1. Use a list to keep track of each roll simulation. For example, rolling two, six-sided die twenty times might produce the following Python list of results: [7, 9, 4, 5, 5, 9, 10, 7, 6, 12, 10, 5, 4, 3, 11, 9, 8, 8, 9, 6] Update the list and print it after each roll. 2. Using…

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