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a) Define race condition in your own words. b) Assume a banking system with two functions: deposit and withdraw (amount). The amount to be deposited or taken from the bank account is provided to these two functions. Say Ahmet and Elif have a joint bank account. Ahmet calls withdraw) and Elif calls deposit (). Explain how a race condition can occur and what can be done to prevent it. 1.
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- 3) Using the technique suggested here, where natural language descriptions arepresented in a standard format, write probable user requirements for the followingfunctions:ii. An unattended petrol (gas) pump system that includes a credit card reader. Thecustomer swipes the card through the reader then specifies the amount offuel required. The fuel is delivered and the customer’s account debited.A student management system is defined below: With the help of the registrar, a new student establishes his/her account. A student can register classes of his/her choosing during the registration period. If the system found there are pre-requisite violations the student will be de- registered from the violating classes. A student who was de-registered up to three times will be warned. A student whose GPA is between 2.0 to 2.3 is also warned. Students who are warned must see the student adviser to remove the warning. A student whose GPA is less than 2.0 or who was warned three times or who has one outstanding warning without seeing the adviser for one semester will be suspended. A student can apply for graduation or transfer to other schools. If the student passed the graduation check by the registrar, she will be put on the list of graduating student. Graduating students whose GPA is higher than 3.5 are put in Dean's list, those higher that 3.9 are put in President's list. Anyone who…Many computer systems support race situations. Consider an organization's accounting system in which several individuals have access to an account from which they may deposit or withdraw: deposit(amount) and withdraw (amount). The amount to be deposited or withdrawn from the account balance is provided to these two functions. Assume Mary and Joe are both workers with access to this account. The account currently has a balance of $3000. Explain how a race situation might develop if Mary executes deposit(500) and Joe performs withdraw(300) from the account and what could be done to avoid the race condition from occuring. Display the potential balances with racing conditions and when race conditions are avoided.
- Part(a): What is a Deadlock? How it is detected? What are the necessary conditions for a deadlock to occur? Part(b): Suppose there are two resources available and the initial value of semaphore is set to 3.Consider a situation where P() and V() functions are called as follows. P(), P(), V(), V(), P(), P(), V(), P(), P(), V(), P(),P(),P(),V() Answer the following: 1. How many processes are sleeping on P ()?What is the value of semaphore? 2. How may processes have successfully completed their execution? 3. How many resources are available?1)Modeling: Make a CDM from the following scenario: * A retail company wants to manage their sales activity. We have the following information- The date of sale, with the possibility of rolling up to the week, month, quarter and year- the store where the sale was made: store name, brand, address, city, department and region. - The employee associated with each sale: surname, first name, date of birth, social security number. Each employee is associated with a store.the customer who purchased the product surname, first name, date of birth, address. The product sold product name, d - iption, category, unit price. The order: quantity sold, amount of turnover, amount of margin. A transaction can consist of one or more orders. The indicators (quantity, turnover, margin) can be negative if it is a reimbursement. 2) In your MCD above, what are the dimension tables? * 3)In your MCD above, what are the fact tables?Draw 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.
- Given the following legal UML class diagram (role names and multiplicities are on the association), is the following statement true or false? See Image to answer the following: A) A Child can have 3 biological parents: True or Flase? B) To be a BiologicalParent, you must have at least 1 child: True or Flase?A robot moves into rooms R1 and R2 and switch the bulbs B1 and B2 on/off. The following are the action schema:1. goto(r, x1, x2) : robot r go to x2 from x12. switchON(s): switchON the bulb s3. switchOFF(s): switchOFF the bulb s 1. Write down preconditions and effects of the above actions. 2. Consider the following: (i) Initial state: < R1;R2;B1;B2 >: Robot is at Room R1 not in Room R2 and both bulbs are off.(ii) Goal state: < R2;B1;B2 >: Robot is at Room R2 and both bulbs are ON.Draw state space diagram for the above by drawing to all possible states.5. Consider the heuristics for this problem shown in the table above, h1 is admissible.
- 82. Consider money is transferred from (1)account-A to account-B and (2) account-B to account-A. Which of the following form a transaction ? a. Only 1 b. Only 2 c. Both 1 and 2 individually d. Either 1 or 2Consider the situation in which two students are interested in enrolling in the same class but there is only place for one additional. How can a computerized registration system prevent one of the students from snagging the last open seat while the other waits?Assignment As an initiation into the study of ethics, carefully read each of the following scenarios. After reflection, come up with your own answer to each of the questions. Scenario 1 Alexis, a gifted high school student, wants to become a doctor. Because she comes from a poor family, she will need a scholarship in order to attend college. Some of her classes require students to do extra research projects in order to get an A. Her high school has a few older PCs, but there are always long lines of students waiting to use them during the school day. After school, she usually works at a part-time job to help support her family. One evening Alexis visits the library of a private college a few miles from her family's apartment, and she finds plenty of unused PCs connected to the Internet. She surreptitiously looks over the shoulder of another student to learn a valid login/password combination. Alexis returns to the library several times a week, and by using its PCs and printers she…