Databases course Here is a schedule with one action missing: R1(C); W2(D); R2(B); ???; W1(A); R3(D); W2(C); W3(B) Figure out which READ actions could replace the ??? and make the schedule not conflict-serializable. Find all possible solutions.
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Here is a schedule with one action missing:
R1(C); W2(D); R2(B); ???; W1(A); R3(D); W2(C); W3(B)
Figure out which READ actions could replace the ??? and make the schedule not conflict-serializable. Find all possible solutions.
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- Write a test client TestBinarySearch.java for use in testing the implementations of min(), max(), floor(), ceiling(), select(), rank(),deleteMin(), deleteMax(), and keys() that are given in the text. Start with the standard indexing client given on page 370. Add code to take additional command-line arguments, as appropriate.Write a test client TestBinarySearch.java for use in testing the implementations of min(), max(), floor(), ceiling(), select(), rank(),deleteMin(), deleteMax(), and keys() that are given in the text. Start with the standard indexing client given on page 370. Add code to take additional command-line arguments, as appropriate.Write a test client TestBinarySearch.java for use in testing the implementations of min(), max(), floor(), ceiling(), select(), rank(),deleteMin(), deleteMax(), and keys() that are given in the text. Start with the standard indexing client given on page 370. Add code to take additional command-line arguments, as appropriate.Write a test client…Provide the correct solution. The task is similar to the producer–consumer problem. The farmer and Shopowner share a fixed-size buffer named warehouse used as a queue. The farmer’s job is to harvest crops(Rice=R, Wheat=W, Potato=P, Sugarcane=S, Maize=M) and put this in the warehouse. Imagine that warehouses have different rooms for different crops. The Shopowner’s job is to take the crops from this wearhouse and make that crops room empty(=N).You have 5 Farmers and 5 Shop Owners You need to modify the following C code: #include <pthread.h> #include <semaphore.h> #include <stdio.h> /* This program provides a possible solution using mutex and semaphore. use 5 Farmers and 5 ShopOwners to demonstrate the solution. */ #define MaxCrops 5 // Maximum crops a Farmer can produce or a Shpoowner can take #define warehouseSize 5 // Size of the warehouse sem_t empty; sem_t full; int in = 0; int out = 0; char crops[warehouseSize]={'R','W','P','S','M'}; //indicating room for…Expand the example code to have some simple functionality and then write unit tests that integrate with Guice for their behavior. import com.google.inject.AbstractModule; public class BillingModule extends AbstractModule { @Override protected void configure() { /* * This tells Guice that whenever it sees a dependency on a TransactionLog, * it should satisfy the dependency using a DatabaseTransactionLog. */ bind(TransactionLog.class).to(DatabaseTransactionLog.class); /* * Similarly, this binding tells Guice that when CreditCardProcessor is used in * a dependency, that should be satisfied with a PaypalCreditCardProcessor. */ bind(CreditCardProcessor.class).to(PaypalCreditCardProcessor.class); }}
- Develop a client that takes an int value N from the command line and does an amortized plot of the cost of all operations in the style of the plots in the text for the process of generating random pairs of integers between 0 and N-1, calling connected() to determine if they are connected and then union() if not (as in our development client), looping until all sites are connected.Create a weighted quick union implementation that does not require the number of items in advance using linked lists or a resizing array. Add the newSite() method, which returns an int identification, to the API.Implement a city database using ordered lists by using java. Each database record contains the name of the city (a string of arbitrary length) and the coordinates of the city expressed as integer x and y coordinates. Your database should allow records to be inserted, deleted by name, and searched by name. Another operation that should be supported is to print all records within a given distance of a specified point/coordinate. The order of cities should be alphabetically by city name. Implement the database using both: an arraybased list implementation, and a circular single linked list implementation.Use may the following node, SLL implementations to implement an ordered circular single linked listModify the simulate() method in the Simulator class to work with the revised interface of ParkingLot and the new peek() method in Queue. In addition, implement the getIncomingQueueSize() method of Simulator using the size() method of Queue. The getIncomingQueueSize() is going to be used in the CapacityOptimizer class (next task) to determine the size of the incoming queue after a simulation run. CODE TO MODIFY IN JAVA: public class Simulator { /** * Length of car plate numbers */ public static final int PLATE_NUM_LENGTH = 3; /** * Number of seconds in one hour */ public static final int NUM_SECONDS_IN_1H = 3600; /** * Maximum duration a car can be parked in the lot */ public static final int MAX_PARKING_DURATION = 8 * NUM_SECONDS_IN_1H; /** * Total duration of the simulation in (simulated) seconds */ public static final int SIMULATION_DURATION = 24 * NUM_SECONDS_IN_1H; /** * The probability distribution for a car leaving the lot based on the duration * that the car has been parked in…
- You can use URLs to access information on the Web from within Java programmes. (uniform resource locators). MindSlave software programmers (working on their new NetPotato browser) want to maintain track of a potentially enormous bookmark list of frequently visited URLs. It would be ideal if they could have arbitrary access to the values saved in the list. Is a List a suitable data structure? (Tip: If not, why not?)Create a test driver application that applies the approaches in our ordered symbol-table API to difficult or pathological situations that might occur in real-world scenarios. Simple key sequences include those that are already in order, those that are reversed, those with all of the keys the same, and keys with only two different values.A dispatcher of RTOS has the following three resources, A, B, and C. A has 7 instances, B has 5 instances, and C has 6 instances. At this time, the allocation, request and available map is shown in table Q1 below. a. Is this system in a safe state? Execute necessary algorithm to show your result. b. Is there a valid sequence that can work for this map? If so show it and state if it is the only one or not. c. Given the allocation table below, if PO requests 1 more resource from A and it is granted, will the system be in a safe state? d. Given the allocation table below, if C has a total of 5 slots that will leave C with only 1 available instance, will the system be in a safe state? If not, suggest a solution to overcome deadlock. Table Ql Allocation Requested Available C PO 1. 2. P1 P2 1. 1. P3 1. 2. 4 A HO 12
- Abstract: the main purpose of this experiment is build real time system using PPI 8255 to control devices connected to. Problem description: assume that there are two devices are connected to port A and two sensors are connected to port B of PPI 8255. They work according to the following table Devices (DID2) 01 10 Sensors (S1S2) 00 01 10 11 11 00 Write a program to control these two devices according to the values of sensors. Each group should submit a zip file which contains the following files Code file: (assembly language code) - Simulation file Report (pdf file) (details of every single step in the code, also what have you learned from this experiment)Computer science. Correct answer will be upvoted else downvoted. Development of the exhibit in William's cell machine happens iteratively in the accompanying manner: In the event that the component is dead and it has precisely 1 alive neighbor in the present status of the exhibit, then, at that point, on the following emphasis it will become alive. For a component at list I the neighbors would be components with files i−1 and i+1. In case there is no component at that list, it is viewed as a dead neighbor. William is a sympathetic individual so all alive components stay alive. Check the note area for instances of the advancement. You are given some underlying condition, everything being equal, and you really wanted to help William discover the condition of the cluster after m emphasess of advancement. Input Each test contains various experiments. The principal line contains the number of experiments t (1≤t≤103). Depiction of the experiments follows. The primary…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?