For the same feature, it is feasible to have both a primary key and a candidate key.
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- What would be necessary to allow the user of an OrderedStructure to provide an alternative ordering during the lifetime of a class? This method might be called sortBy and would take a Comparator as its sole parameter.Exercise 1 The HeapManager in this chapter implements a first-fit mechanism. It uses the first block on the free list that is at least as large as the requested size. Another fairly simple mechanism is called best-fit. As you might guess, the idea is to search the free list for a sufficiently large block that is as close to the requested size as possible. If there is an exact fit on the free list, the best-fit mechanism can stop the search early. Otherwise, it has to search all the way to the end of the free list. This has the advantage that it does not break up large blocks unnecessarily. For example, if there is an exact fit somewhere on the list, the best-fit mechanism will find one, so it will not have to split a block at all. Implement a version of HeapManager with a best-fit mechanism. Start with a renamed copy of the HeapManager class, and then modify the allocate method to implement a best-fit search. (The code for HeapManager is available on the Web site for this book. It…Write c++ code Create a BST where each node stores the rollNumber and marks of a student. Your task is toprovide the implementation of following methods.constructorinsertRecord() functionupdateRecord() functioncountOfPassedStudents()showData() functioninside main() function, create an object of BST class.Insert the following data and create the BST according to the marks.● 19L-1941, 71 should be the root node● 19L-1942, 62● 19L-1943, 67● 19L-1944, 54● 19L-1945, 58● 19L-1946, 45● 19L-1947, 29● 19L-1948, 76● 19L-1949, 81● 19L-1950, 92Update the data of following record● Marks of 19L-1944 are 54. Update the marks to 47● Marks of 19L-1949 are 81. Update the marks to 85Call the countOfPassedStudents(). You can either display the count in the same function orreturn the value to main function.Call the showData() function to display all the records of BST in preorder traversal.Note: It is not mandatory to create a template class
- @return index of the point that is closest to the origin, which is (0, 0) * In case of a tie, return the lowest index */ public int closestToOriginIndex() { return 0; }Using a Generic class that implements the Comparator interface, write a workingprogram that compares the performance of any two IPL teams in terms of the following:1) Points per match= PTS/PLD2) Form= (# of Ws)/33) Net Run Rare= Net RRYou can use the following data to make comparisons between any two teams of yourchoice: You can hard code the data associated with the two teams you have chosen. Hence, no needto take any inputs from the user. Upon running the program, the program should simplyoutput the three comparison results.Additionally, please mention the names of the two chosen teams in the beginning of theprogram in a comment.Tour.java Create a Tour data type that represents the sequence of points visited in a TSP tour. Represent the tour as a circular linked list of nodes, one for each point in the tour. Each Node contains two references: one to the associated Point and the other to the next Node in the tour. Each constructor must take constant time. All instance methods must take time linear (or better) in the number of points currently in the tour. To represent a node, within Tour.java, define a nested class Node: private class Node { private Point p; private Node next; } Your Tour data type must implement the following API. You must not add public methods to the API; however, you may add private instance variables or methods (which are only accessible in the class in which they are declared). public class Tour // Creates an empty tour. public Tour() // Creates the 4-point tour a→b→c→d→a (for debugging). public Tour(Point a, Point b, Point c, Point d) // Returns the number of points in this tour. public…
- Find the error in each of the segments. If the error can be corrected, explain how ? short* numPtr, result;void* genericPtr{numPtr};result = *genericPtr + 7;A map has the form Map <k,v> where: K: specifies the type of keys maintained in this map.V: defines the type of mapped values.Furthermore, the Map interface provides a set of methods that must be implemented. In this section, we will discuss about the most famous methods: clear: Removes all the elements from the map.containsKey: Returns true if the map contains the requested key.containsValue: Returns true if the map contains the requested value.equals: Compares an Object with the map for equality.get: Retrieve the value of the requested key.entrySet: Returns a Set view of the mappings contained in this map.keySet: Returns a Set that contains all keys of the map.put: Adds the requested key-value pair in the map.remove: Removes the requested key and its value from the map, if the key exists.size: Returns the number of key-value pairs currently in the map. Here is an example of TreeMap with a Map: import java.util.Map; import java.util.TreeMap; public class TreeMapExample {…Study the scenario and complete the question(s) that follow: Sets and MapsA map is a container object that stores a collection of key/value pairs. It enables fast retrieval, deletion, and updating of the pair through the key. A map stores the values along with the keys. The keys are likeindexes. In List, the indexes are integers. In Map, the keys can be any objects. A map cannot contain duplicate keys. Each key maps to one value. A key and its corresponding value form an entry stored in a map. There are three types of maps: HashMap, LinkedHashMap, and TreeMap. The common features of these maps are defined in the Map interface. 1.1 Using the Map interface knowledge, create a Java application in NetBeans that implements a HashMap and a LinkedHashMap. The application must do the following: a. Add at least 5 elements to the HashMapb. Print out all the elements in the HashMap including their keysc. Find and print out the value of a specific indexd. Remove one of the elements from the…
- A map has the form Map <k,v> where: K: specifies the type of keys maintained in this map.V: defines the type of mapped values.Furthermore, the Map interface provides a set of methods that must be implemented. In this section, we will discuss about the most famous methods: clear: Removes all the elements from the map.containsKey: Returns true if the map contains the requested key.containsValue: Returns true if the map contains the requested value.equals: Compares an Object with the map for equality.get: Retrieve the value of the requested key.entrySet: Returns a Set view of the mappings contained in this map.keySet: Returns a Set that contains all keys of the map.put: Adds the requested key-value pair in the map.remove: Removes the requested key and its value from the map, if the key exists.size: Returns the number of key-value pairs currently in the map. Of interest to us is the TreeMap. Here is an example of TreeMap with a Map: import java.util.Map; import…Develop classes STint and STdouble for maintaining ordered symbol tables where keys are primitive int and double types, respectively. (Convert genericsto primitive types in the code of RedBlackBST.) Test your solution with a version ofSparseVector as a client.import java.util.HashSet; import java.util.Set; // Define a class named LinearSearchSet public class LinearSearchSet { // Define a method named linearSearch that takes in a Set and an integer target // as parameters public static boolean linearSearch(Set<Integer> set, int target) { // Iterate over all elements in the Set for () { // Check if the current value is equal to the target if () { // If so, return true } } // If the target was not found, return false } // Define the main method public static void main(String[] args) { // Create a HashSet of integers and populate integer values Set<Integer> numbers = new HashSet<>(); // Define the target to search for numbers.add(3); numbers.add(6); numbers.add(2); numbers.add(9); numbers.add(11); // Call the linearSearch method with the set…