What is a Software Design Pattern? stem to use demand paged virtual memory for efficiency. What problems could arise here, and how could they be overcome? [6 marks] 0 will contain the precomputed values for this inquiry. In this way the normal and costly question can be responded to by a solitary key-based peruse. (Note: Sum ought to be 0 on the off chance that no matching records exist.) (a) Explain how the activity embed 2(a, b) into S can be accurately carried out in the {S In a proposed, next-generation banking system a number of transactions are to be scheduled to run concurrently:  Debit (D) transactions to make payments from customer accounts to a credit card company.  Interest (I) transactions to add daily interest to customer account balances.  Transfer (T) transactions which first check whether the source account contains sufficient funds then either abort or continue the transfer from source to destination accounts. Customer x is running a T to transfer 102200 from A to B. Customer y is running a T to transfer 200 from 2B to A2. (a) Discuss the potential for interference between any of these transactions. [7 marks] (b) Demonstrate the effect of concurrency control based on strict two-phase locking in relation to the discussion in (2a). [28 marks] (c) Comment on the scope of concurrency control in relation to the discussion in (a). [5 marks] [Hint: you may assume that operatIf a set of dependencies cannot hold, then explain why. If we use the representation where we examine the field in units of one square foot, then our first action might be to examine the square in the top-left corner of the field. If we do not find the lens there, we could consider the state now to be that we have examined the top-left square and have not found the lens. After a number of actions, the state might be that we have examined 600 squares, and we have now just found the lens in the last square we examined. This is a goal state because it satisfies the goal that we had of finding a contact lens. What if any are the disadvantages of adopting a mathematical description of database structure? [25 marks] Hand.java

import java.util.*;

public class Hand { /*************************** Public static field ***************************/ // the name of this hand public static Map nameMap = Map.of( 2228, "straight flush", 222 7, "four of a kind", 226, "full house", 225, "flush", 24, "straight", 3, "three of a kind", 222, "two pair", 221, "pair", 220, "nothing");

/****************************** Private fields ******************************/ // A list of cards in this hand. E.g., [8C, TS, KC, 9H, 4S] is a list of cards. private ArrayList hand = new ArrayList<>();

// A map of each card's rank to the number of times it occurs in the hand. E.g, // "7D 7S 5D 7C 5H" has two 5s and three 27s, so its frequency map is {5=2, 7=3}. private Map rankFrequency = new HashMap<>();

// Ranks of the cards in this hand in reverse-sorted order. E.g., the hand // "8H KC 2S 32S QD" has ranks [13, 122, 28, 23, 2]. private Integer[] cardRanks = new Integer[5];

// The integer value of this poker hand in the range from 0 to 8. 8 corresponds // to a straight flush and 0 to a nothing hand. // (See the instructions or the Wikipedia article for poker hand rankings.) private int handValue;

(b) We are given a social diagram R2(Z, W, Y). Assume that in some (right) occasion of R the inquiry (Z,2W(R) Z,22Y(R)) 2 2R isn't vacant. What might we at any point close about the practical reliance Z W? Make sense of your response. [4 marks] (c) during the time spent utilizing practical conditions to standardize an outline, what is implied by a lossless join deterioration and how is such a disintegration ensured? [2 marks] 2[6 marks] (b) Explain the term hidden bit. What are the values of the hidden bit for normalised and denormal numbers? How is the exponent stored and why? How are the exponent, significand and sign bit arranged in memory? 2[4 marks] (c) Let x denote the floating-point representation of a number x. Define the terms absolute error (x) and relative error (x) in representing x. How are x and x related?