7. When several processes access the same data concurrently and the outcome of the execution depends on the particular order in which the access takes place is called ________ i) dynamic condition ii) race condition iii) essential condition iv) critical condition
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7. When several processes access the same data concurrently and the outcome of the execution depends on the particular order in which the access takes place is called ________
i) dynamic condition
ii) race condition
iii) essential condition
iv) critical condition
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- Critical Sections - Select all of the following statements that are true A critical section is a segment of code in which a process has write-access to data or resources that are shared with at least one other process. Every process waiting to enter a critical section must be allowed to enter it at some point. No eternal waiting must be possible. In a system consisting of n processes, a critical section protected by a mutex variable can be accessed by more than one process at a time. A process not executing in a critical section must not prevent other processes from entering the critical section. Critical sections must never contain data shared by multiple processes. O DELL WA program becomes a process when it is an active entity loaded in main memory. max 0 ↓ 介 What region is used for variables local to a function? no option is correct data stack text heap sparse address spacein C++ please create a Priority : -pre-emptive algorithm code: here are information that will help you Tasks: • Lab 4: Process management • Review Process management algorithms Definitions: (in terms for this lab not formal definitions) • Preemptive: When a new process arrives and has a higher priority than the current running process, Then the current running process is paused and put back in the waiting queue, and the new process starts executing. In most systems it will automatically interrupt the current running job when the new job arrives, however some systems use a predetermined interval (a certain number of time units), to check for new jobs. • Non preemptive: Take no action when a process with higher priority arrives,when a new process with a higher precedence arrives current running process need to finish first before the new process goes Oxford definition: Preempt – to take action in order to prevent (an anticipated event) from happening; forestall. • Metric: a metric is…
- COPY FROM CHEGG == DISLIKE AND REPORT Assume that a finite number of resources of a single resource type mustbe managed. Processes may ask for a number of these resources and will returnthem once finished. As an example, many commercial software packagesprovide a given number of licenses, indicating the number of applications thatmay run concurrently. When the application is started, the license count isdecremented. When the application is terminated, the license count isincremented. If all licenses are in use, requests to start the application aredenied. Such a request will be granted only when an existing license holderterminates the application and a license is returned. The following program segment is used to manage a finite number of instancesof an available resource. The maximum number of resources and the number ofavailable resources are declared as follows: #define MAX_RESOURCES 5 int available_resources = MAX_RESOURCES; /** When a process wishes to obtain a number of…Real Time Scheduling: Select all statements below that are true EDF scheduling assigns the highest priority to a process with the smallest remaining time until its deadline. RM scheduling assigns a higher priority to processes with shorter periods. Rate Monotonic (RM) scheduling works by dividing the total amount of time available into an equal number of shares, and then each process must request a certain share of the total when it tries to start. If a process has period p, it is activated every p units of time. A real-time system is schedulable under Earliest Deadline First (EDF) when its overall CPU utilization is less than or equal to 1. A real-time system is schedulable under RM when its overall CPU utilization is less than 1.Arguments for deep access over shallow access should be made from the viewpoint of an application programmer; performance should not be the focus of the argument.
- 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?A program becomes a process when it is an active entity loaded in main memory. max 0 ↓ 介 What region holds the global variables? text data heap no option is correct sparse address space stackCommunication between processes may serve as an alternative to storing data in a shared memory for structures that are utilized by several processes at the same time. What are some of the drawbacks of using a design of this kind?
- TASK1: 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 that is closest in size to the request. First-fit chooses the first available block that is large enough. Worst-fit chooses the largest available…50. Match the following.i) Mutual exclusion a) A process may hold allocated resources while waiting assignment.ii) Hold and wait b) No resource can be forcibly removed from a process holding it.iii) No preemption c) Only one process may use a resource at a time. a. i-a, ii-b, iii-c b. i-a, ii-c, iii-b c. i-b, ii-c, iii-a d. i-c, ii-a, iii-bWhen it comes to memory allocation, what is the difference between "static" and "dynamic?"