1. The bank account balances are: a=500, b=600, c=1000. What possible account balances can appear after concurrent execution of transactions: bank transfer of 300 from a to c: bank transfer of 100 from b to c: if (a < 300) {ABORT} else {а:%3D а — 300; ra :3 с; ra 3D ra + 300; с:%3D ra} if (b < 100) {ABORT} else {b:= b – 100; rb := c; rb := rb + 100; c:=: Why results of concurrent performance of these transactions may be incorrect? What should be added to these programs to obtain correct solution? What are correct balances of accounts a,b,c on completion of the performance?

SCALA Programming Problem Stone Pit is a game in historic roman time, that involves removing stones from tower of stones. The rules of this game are mentioned under: • At first there are X group of stones, numbered 1 through x. Two warriors can play and they take alternate turns. If the bitwise XOR of all group equals 0 before a warrior's chance, then that warrior is declared winner. When warrior's turn comes, they must choose one of the remaining groups and remove it. Develop a SCALA program to decide which warrior wins, given that both warriors are expert at this game. Sample Input: 1 3 561 Sample Output: First Warrior

if L1={ab,b} L2={abb,bb} then LIL2= * O {ababb,abbb,abbab,bbab} O {ab,b,abb,bb} O {ababb,abbb,babb,bbb} O {abbab,abbb,bbab,bbb}

Python Knapsack Problem: imagine you are carrying a knapsack with capacity to hold a total of weight C. You are selecting among n items with values A={a_1, a_2, ... , a_n} and associated weights W={w_1, w_2, ... , w_n}. Here the weights and values are all positive. You wish to maximize the total value of the items you select not exceeding the given weight capacity, example, maximize sum_{a in A} such that sum_{w in W} <= C.  Note that you can only select your items once.  Reformulate this as a bottom-up dynamic programming problem as follows. Define K_{i,j} as the highest possible value sum considering items 1 through i and total weight capacity j (j <= C). What is the base case i.e. K_{0,j} for all j and K_{i,0} for all i. What is the loop statement?

Please I want solution of this on an urgent basis. Many Thanks

Subject -CSE

A retail store has a preferred customer plan where customers can earn discounts on all their purchases. The amount of a customer’s discount is determined by the amount of the customer’s cumulative purchases in the store as follows: • When a preferred customer spends $500, he or she gets a 5 percent discount on all future purchases. • When a preferred customer spends $1,000, he or she gets a 6 percent discount on all future purchases. • When a preferred customer spends $1,500, he or she gets a 7 percent discount on all future purchases. • When a preferred customer spends $2,000 or more, he or she gets a 10 percent discount on all future purchases. Design a class named PreferredCustomer, which is derived from the Customer class you created in Programming Problem 4. The PreferredCustomer class should have properties for the amount of the customer’s purchases and the customer’s discount level. Demonstrate the class in a simple application.

Given the following PDA M, the correct statements are: a/ɛ/a b/a/ɛ a/b/ɛ b/ɛ/b L(M) = {w€ {a, b}* : #₂(w) = #b(w)} L(M) = {w€ {a, b}* : #a(w) > #b(w)} L(M) = {w€ {a, b}* : #a(w) < #b(w)}

c++

Problem: UMLThis exercise is for a simplified supermarket cash register system. The normal procedure for using the cash register is as follows:• A customer arrives at the checkout with items to pay.• The cashier records the identification number of each item, as well as the quantity if it is greater than one.• The checkout displays the price of each item and its description.• When all purchases are recorded, the cashier signals the end of the sale.• The cash register displays the total purchases.• The customer chooses his method of payment:✓ cash: the cashier collects the money received; the cashier indicates the currency to be returned to the customer;✓ check: the cashier checks the creditworthiness of the customer by transmitting a request to an authorization center via the cashier;✓ credit card: a bank terminal is part of the cash register. It transmits an authorization request to an authorization center according to the type of card.• The cash register registers the sale and prints…