Answered: se two functions.

Engineering

Computer Science

se two functions.

Operations Research : Applications and Algorithms

4th Edition

ISBN:9780534380588

Author:Wayne L. Winston

Publisher:Wayne L. Winston

Chapter20: Queuing Theory

Section: Chapter Questions

Problem 17RP

See similar textbooks

Similar questions

Race conditions are possible in many computer systems. Consider an accounting system of an organization where multiple users have access to an account to which they can either deposit or withdraw from: deposit(amount) and withdraw(amount). These two functions are passed the amount that is to be deposited or withdrawn from the account balance. Assume that Mary and Joe are employees who have access to this account. Currently, the balance in the account is $3000. If Mary executes deposit(500) and simultaneously Joe executes withdraw(300) from the account, describe how a race condition is possible and what might be done to prevent the race condition from occurring. Show the possible balances with race condition and when race condition is prevented.
2. Model a state machine for a chess game using the following description: A chess game consists of alternate moves of Black and White. White moves first (start of the game). The game can end both when it is White's and when it is Black's turn. The moving player can end the game: winning (checkmate), loosing (resign), or with a draw.
.
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.
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 2
Answer the following questions about the given statement:∀t : Trainer • ∃c : course • (t,c) ∈ Teaches•What does this statement mean?•Is this statement a set or a predicate?•What does the statement evaluate to based on the current system state?
Consider the following statements. Rewrite each logical statement using the corresponding English sen- tences. please help and do all of them with work please
A medical Centre can have many doctors. A doctor can be scheduled for many appointments but may not have any scheduled appointment at all. A patient can schedule request for one or more appointments. However, every appointment is about only one patient. As a result of every appointment, there must be a bill. One payment is applied to exactly 1 bill, and 1 bill can be paid off over time by several payments. A bill can be outstanding, having nothing yet paid on it at all. One patient can make many payments, but a single payment is made by only 1 patient. Some patients are insured by an insurance company. If they are insured, they can only carry insurance with one company. An insurance company can have many patients carry their policies. For patients that carry insurance, the insurance company will make payments, each single payment is made by exactly 1 insurance company. (Hint: final ERD must include 7 tables.) a) Identify the entities with attributes and keys (primary and foreign keys).…
34) The key function of a reservation system is to serve as the repository of all the bookings that have been accepted for future flights. Is this sentence valid A. True B. False C. Not applicable D.None of the above
1. StrangeNEWS® just reported that suddenly a very VERY strange planet appeared out of nowhere! Three species, A, B and C are living on this planet. Any two different species can mate. If they do, two children will be born and they themselves will die. The planet will fail if there only one kind of specie left (therefore, no more mating can take place). We denote mating between two individuals from B and C species by a. Similarly, we define b and c. We want to draw an automaton for any given initial number of species on the planet that tells us whether a sequence of mating is possible and/or causes the planet to fail. For example, let's say there is only one individual of species A and one of species B. Then, the only way that a mating can happens is if these two individual mate with each other (mating of type c). We can draw a finite automaton for it as below: 110 As you can see, final state in this automoton is when the planet failes (not more mating possible or, in other words,…
1. Lupin: The True Story of the Queen's Necklace He enters an auction held under the glass pyramid in the Louvre and steals the famous Queen's Necklace, which will sell for 17 million euros. The safe password, which Lupine entered as 5144 on his first try, is incorrect. This precious jewel is kept in a highly secure safe. After the 4th attempt, the 8445 password he entered was accepted and he succeeded in getting the jewel. If his 5th attempt was wrong, he would be surrounded by cops. Write the code that tells the story of Lupin. Follow the below tips: ■ Create an input screen Use the while or for loops with if command If the password is correct show "password accepted", otherwise "password is incorrect" messages on screen. If the password is entered incorrectly 5 times, show "The safe has been locked" message.
a) Define the following concept formally using description logics: A university has a female president, at least 5 vice presidents, all department chairs are professors whose ranks are full, and who have served the university for at least 10 years. b) Suppose we have a knowledge base -- PhD circle-equals [AND GraduateStudent [FILLS :Program doctorate]] -- GraduateStudent squared-subset-or-equals Student Which of the following two sentences is a valid one? Which one can only be entailed? A) [AND Student Male] squared-subset-or-equals Student B) [AND PhD Male] squared-subset-or-equals Student