In order to manage a critical section in a proper way, the following has to be satisfied: a. Mutual exclusion O b. At least one process would be writing O c. All processes should be reading d. At most one process would be writing
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- As a teaching administrator of the department, your responsibility is to schedule the classes for a particular classroom. Suppose there are n classes, each class i is represented by its start time and finishing time [Si, fi], and we say that two classes i and j are non-conflicting if they do not overlap in time (i.e., sizfj or szfi). You want to schedule as many classes for the classroom as possible, but the scheduled classes should be non-conflicting. Develop an algorithm so that you can select the maximum number of classes for the classroom. (We are expecting either pseudocode or language description of your algorithm)(i) Describe Banker’s algorithm for deadlock avoidance with supporting example Consider a computer system with has four identical units of a resource R. There are three processes each with a maximum claim of two units of resource R. Processes can request these resources in anyway, that is, two in one shot or one by one. The system always satisfies a request a request for a resource if enough resources are available. If the process doesn’t request any other kind of resource, show that the system never deadlock Give a solution for the following synchronization problem using semaphores Producer- Consumer Problem Readers- Writers Problem List out the issues in preprocessor scheduling that causes performance degradation in multiprocessor systems2. Generate a BLP lattice structured system where the objects and subjects are appropriately levelle to give access consistent with the access control matrix below. You need to describe the process b which you obtain your lattice. R and W correspond, respectively, to read and append. You are t use only the mandatory BLP rules, and a default allow in place of the discretionary rule. Be sure t add a level as necssary to ensure this is a lattice. 0₁ 0₂ R S₁ R 03 04 R R W S₂ R S3 R RW RW S₁ R S5 R S6 R R R 1 R 05 06 Ꭱ ] ᎡᎳ W W W R 3. For the following collection of statements, describe the sets of actions, objects, and subjects; an draw an access control matrix to represent the scenario. W W Alice can climb trees and eat apples. Bob can climb fences, eat apples, and wave flags. Trees can hurt apples. Carol can jump waves and wave flags.
- 2. Generate a BLP lattice structured system where the objects and subjects are appropriately levelled to give access consistent with the access control matrix below. You need to describe the process by which you obtain your lattice. R and W correspond, respectively, to read and append. You are to use only the mandatory BLP rules, and a default allow in place of the discretionary rule. Be sure to add a level as necssary to ensure this is a lattice. 0₁ S₁ R S2 R S3 R RW RW S4 R S5 R S6 R 02 R 03 04 05 06 R R RW R WW R R R W W W W RA hostel warden states the following requirements for a hostel information system: Our hostel has 500 rooms and 4 messes. Currently there are 1000 students in all in 2-seated rooms. They eat in any one of he messes but can get a rebate if they inform and do not eat for at least 4 consecutive days. Besides normal menu, extra items are also given to students when they ask for it. Such extras are entered in an extras book. At the end of the month, a bill is prepared based on the normal daily rate and extras and given to student. Draw a logical DFD.In a Video Rental System, a customer rents a videotape from the shop. He will give the video information to the Employee who will then check the video library. In that scenario, with the help of DFD symbols, what can the 'video library' be categorized as? a. External Entity b. Data Store c. Data Flow d. Process
- Jin Mori is like any other student who loves sleeping. Jin Taejin, his grandfather, imposes a waking schedule that Jin Mori must follow to avoid tardiness at his school. The schedule stated that on weekdays, Mori must be awake at "7:00" and at "10:00" at weekends. Taejin added an exemption for their school vacation. If it is their school vacation, the schedule is "10:00" for weekdays and "off" for weekends. If Jin will not follow the schedule, he is not allowed to practice his favorite martial art, taekwondo. Your job is to create a program that will serve as the alarm clock for Jin Mori. Expected Output: Test Case 1: Vacation: False Day: Monday Alarm Time: 7:00 Awake: Yes Be ready for your practice Mori! Test Case 2: (input) (input) (auto generated) (input) Vacation: False Day: Saturday Alarm Time: 10:00 Awake: No (input) (input) (auto generated) (input) You are not allowed to practice your taekwondo!For Mutual exclusion to prevail in the system :Explore the bakery algorithm for the N-process critical problem. Explain all the conditions for good solution to a critical section problem against the bakery algorithm. Your explanation needs to have a proper scenario you can discuss the scenarios either diagrammatically or descriptively. Note : Code Must be in c++
- MCQ: A set { P0, P1, Pn} of waiting processes must exist such that P0 is waiting for a resource held by P1, P1 is waiting for a resource held by P2, …, Pn-1 is waiting for a resource held by Pn, and Pn is waiting for a resource held by P0. This condition for deadlock is referred to as a. Hold and Wait b. Mutual Exclusion c. Circular Wait d. No Preemption2.Polling server. A real-time system has two periodic tasks T1 (5, 1), T2 (6, 2), and a polling server S (4, 1). Two aperiodic jobs are released at 2 and 8 with execution time 1.5 and 2 respectively. Apply Rate-Monotonic algorithm to schedule the periodic and aperiodic jobs and draw the Gantt chartDraw a Use Case Diagram for a voting machine, on which voters can see a list of Q-3: candidates and select one to vote for. The machine should check that each voter is eligible to vote. The electoral registrar will also want to print a summary of the total votes for each candidate, and (separately) a list of the voters who have voted, and a list of those who haven't. In case of a dispute, the machine should also list a complete record of who voted for whom, but only a judge can use this function.
