Which of the following statements are true? Select all that apply Select 3 correct answer(s) In virtual machines, each guest (or VM image) is provided with a virtual copy of the underlying hardware A virtual machine runs a complete operating system including its own kernel Ring 0 in the onion model of an operating system is rarely used, except in virtualization In Virtual machines, each guest (or VM) is isolated from each other, preventing direct sharing of resources

Which of the following statements are true? Select all that apply Select 3 correct answer(s) In virtual machines, each guest (or VM image) is provided with a virtual copy of the underlying hardware A virtual machine runs a complete operating system including its own kernel Ring 0 in the onion model of an operating system is rarely used, except in virtualization In Virtual machines, each guest (or VM) is isolated from each other, preventing direct sharing of resources

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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26. The following four requests could come in to an operating system as it is running on a computer system: The clock in the computer has just "ticked," and we need to update a seconds counter. The program running on processor 2 is trying to perform an illegal operation code. Someone pulled the plug on the power supply, and the system will run out of power in 50 msec. The disk has just read the character that passed under the read/write head, and it wants to store it in memory before the next one arrives. In what order should the operating system handle these requests?
Concurrent Processes: Select all of the following statements that are true. A critical section is a segment of code in which at least one process has write access to shared data or resources. The operations acquire() and release() of the Mutex Lock API offered by operating systems may be interrupted during their execution. The Peterson Algorithm is a purely software-based solution to the mutual exclusion problem.
Assuming that int status; has previously been run by the parent of a child process, consider the following system call made by the parent: wait(&status) What information does the variable status eventually contain (according to our project documents)? whether the child is a zombie whether the child is an orphan whether the child is still running if it applies, the signal which terminated the child the pid of the child the inode of the child
Please answer this to the best of abilities.. Select all of the statements that are true.
Task 'A' run on a CPU. The task starts by running for 6 ms. 'A' waits for 4 ms while the operating system runs some instructions to access memory. The CPU is then idle for 1 ms while waiting for the memory read to complete. Finally, the task 'A' runs another 25 ms and completes. What is the CPU performance in ms? [ Give answer as a number only]
Discuss the topic of Interrupting classes. Determine which Interrupts begin and conclude the process.
question 27
An example of the role that an operating system plays as a resource allocator could make it simpler to grasp this aspect of its function. [This phrase needs a reference] [This phrase needs a reference]
Description:The project I am working on needs to demonstrate how two processes (parent and child) can communicatethrough a shared memory region, with the child process writing a value to the shared memoryand the parent process reading that value. This is my code and I wont run. Can you help: #include <stdio.h>#include <stdlib.h>#include <sys/types.h>#include <sys/ipc.h>#include <sys/shm.h>#include <unistd.h> #define SHM_SIZE 1024 /* shared memory size */ void error_exit(const char *msg) { perror(msg); exit(EXIT_FAILURE);} int main() { key_t key; int shmid; char *data; // Create a unique key for shared memory if ((key = ftok("shared_memory.c", 'R')) == -1) { error_exit("ftok"); } // Create the shared memory segment if ((shmid = shmget(key, SHM_SIZE, 0644 | IPC_CREAT)) == -1) { error_exit("shmget"); } // Attach the shared memory segment to our data space data = shmat(shmid, (void *)0, 0); if…
Which of the follow describes the fixed partition technique? Group of answer choices: a) Main memory is divided into a single partition. b) Main memory is divided into a number of static sized partitions. c) All memory partitions are full. d) All memory partitions are the same size. e) Some memory partitions are empty.
Arguments in favor of deep access vs shallow access should be made from the viewpoint of an application programmer; performance should not be the main focus of the argument.
What precisely does it mean to configure the different pieces of software that you have? Is it feasible to have a discussion on the administration of configurations?