Mutual Exclusion: Select all of the following statements that are true. The Peterson Algorithm is a purely software-based solution to the mutual exclusion problem. The 'test_and_set' instruction is atomic. Mutex Locks are an API offered by operating systems to protect critical sections The Peterson Algorithm does not rely on the mechanism of busy waiting. In order to enter a critical section protected by Mutex Locks, the release() operation must be executed.
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- Semaphores: Select all of the following statements that are true. The operations P (Test) and V (Signal) can be interrupted. The operations P (Test) and V (Signal) run in the operating system's user mode. The values of binary semaphores are restricted to 0 and 1. Counting semaphores are used to manage limited resources and the corresponding access to them. Semaphores can be used to synchronize certain operations between processes. When accessing the list of a semaphore, the FIFO principle should be preferred to the LIFO principle.: Find the weakest precondition for the following code. Show all intermediate conditions. Simplify your answer Question 4. as much as possible. { } // This is the weakest precondition. Please fill in. x++; { } // This is an intermediate condition. Please fill in. if (z != 5) { { } // This is an intermediate condition. Please fill in. z = x + 1; { } // This is an intermediate condition. Please fill in. y { } %3D z; } // This is an intermediate condition. Please fill in. { } // This is an intermediate condition. Please fill in. Z = y z; { z != 0 } // This is the postcondition.Discussion Purpose: A discussion of the topic will reinforce the learning objectives of this lecture as students will research the topic and thereby enhance their learning and level of understanding. The interaction of ideas here will also be a healthy exposure to different perspective on the topic. Discussion Topic: A runtime Java system searches for exception handlers in call stack and terminates the program when it can't find one. The use of Exceptions to handle errors mitigates a lot of program interruptions. Examine and write some of the advantages of Exception handling.
- Stopping these actions in a deadlock will result in:AIM- Write an 8085 sequence to check whether the first set of reading is higher than the second one or not. PROBLEM STATEMENT- The pressure of two boilers is monitored and controlled by a microcomputer works based on microprocessor programming. A set of 6 readings of first boiler, recorded by six pressure sensors, which are stored in the memory location starting from 2050H. A corresponding set of 6 reading from the second boiler is stored at the memory location starting from 2060H. Each reading from the first set is expected to be higher than the corresponding position in the second set of readings. Write an 8085 sequence to check whether the first set of reading is higher than the second one or not. If all the readings of first set is higher than the second set, store 00 in the 'D' register. If any one of the readings is lower than the corresponding reading of second set, stop the process and store FF in the register 'D'. Data (H): First set: 78, 89, 6A, 80, 90, 85 Second Set:71, 78,…IN C++: Semaphores are used to mediate access to computer resources. Your task is to write a program that uses semaphores to simulate mediated access to three computer resources: 5 printers 6 plotters 4 scanners Your program shall: Declare and initialize the semaphores with the appropriate values. Create a routine that loops through a sequence 4 times. In each iteration the process forks a child process.The child process: uses a random number generator (1-3) to determine which resource it will request uses native semaphore function or one that you create to request the appropriate resource Print the process’ PID and the requested resource type Print the process’ PID and the success/failure of the request if the resource is available - sleep for a random time between 1-3 seconds and then release the resource using appropriate the semaphore function if the resource is not available – sleep for a random between 2-4 seconds and repeat the request (go to step ii). Terminate Sleeps…
- [Access Control Policy]: A computer system usually implements the exception handling mechanism. Like the interrupt handling mechanism, the original program flow will be stopped until the exception is handled. For example, when a program is calculating c=a/b, and for some reason b was set to 0, the program will encounter the "Division by Zero" exception. The control will be given to the exception handler, and the recovery action could be "report only", "return to the next instruction", "purge the program", etc., based on the severity of the problem. From the abov information, we can conclude: A computer system can integrate both Discretionary Access Control (DAC) and Mandatory Access Control (MAC) security policies An administrator can inhibit the exception handling The exception handling mechanism is like the Mandatory Access Control security policy, no matter which user caused the exception (even the administrator), the program should be stopped, and the control should be given to the…Scheduling: Select all of the following statements that are true. The service time is also known as the CPU burst. The minimum average waiting time for a given set of processes is reached when the Shortest Job First (SJF) scheduling algorithm is applied. The method of exponential averaging can be used to increase the priority of jobs according to their waiting time. Round Robin (RR) scheduling can lead to starvation. Priority Inversion means that high-priority processes can be delayed or blocked by lower-priority processes._____ is used to prevent busy waiting in the implementation of a semaphore. a. None of these b. Waiting queues c. Spinlocks d. Mutex lock e. Wait() operation
- Perform the given task.Q5 - Where is the operand (data) found in each of the following addressing modes? Example: d = direct (the operand specifier is the address of the operand) i.e.; the operand is found in the memory location whose address is given in the second and third bytes of the instruction. (DO NOT USE Mem[ OprndSpec ] as given in the text but rather write it out as shown) i = s = sf = x = sx = n =USING C language In this project you will implement a program that simulates a simple text editor with the undo/redo functionalities allowed. The program will accept statements, one at a time with a maximum of 100 characters per line.There will be some special commands as follows:1. undo: this will undo (i.e., remove) that last entered statement;2. redo: this will redo (i.e., re-add) that last removed statement;3. print: this command will print the entire stored input text;4. save: will save the text to a file called (output.txt);5. quit: will exit the program and save all results to output.txtExecution example:MyCommand > This is a test inputMyCommand > COMP2421 – Data structures & AlgorithmsMyCommand > test1MyCommand > printresult > This is a test inputCOMP2421 – Data structures & Algorithmstest1MyCommand > undoresult > This is a test inputCOMP2421 – Data structures & AlgorithmsMyCommand > redoresult > This is a test inputCOMP2421 – Data…