QUESTION 2Pointers are never used forO pointing to an objectOb. pointing to a variableOC pointing to a fileOd pass-by-referenceOe None of the aboveQUESTION 3Data structures, such as binary trees and linked listsa. are a fxed, unchanging storage with no ability to growb.c are able to grow and store more idatae. None of the aboveO are easy to create and maintain without librariesOb never have any form of errorOare able to grow and store more idataOd are a foced size, kept in a contiguous memory areaOe None of the aboveQUESTION 4In order to get a Java program, to run, the main functionOais in a classO b.is always named mainOCs always publicOd all of the aboveOe None of the above

According to the guidelines we are supposed to answer only one question. SO I am answering the…

Answered: QUESTION 2 Pointers are never used for…

QUESTION 2 Pointers are never used for pointing to an object O pointing to a variable O pointing to a file d. pass-by-reference Oe None of the above

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Hello, I need help with coding a 4 level family tree in java. somehing like the following code. import java.util.Arrays;import javax.swing.JFrame;import com.mxgraph.layout.hierarchical.mxHierarchicalLayout;import com.mxgraph.swing.mxGraphComponent;import com.mxgraph.view.mxGraph;public class JGraphX2 extends JFrame{private static final long serialVersionUID = -2707712944901661771L;SimpleTreeNode<String> root = createSimpleTreeNode();public void fillGraphFromModel( mxGraph graph) {graphUpdate();Object parent = graph.getDefaultParent();graph.getModel().beginUpdate();try{Object vRoot = graph.insertVertex(parent, null, root.getData(), 80, 0, 80, 30);Object vChild1 = graph.insertVertex(parent, null,root.getChildren().get(0).getData() , 0, 0, 80, 30);Object vChild2 = graph.insertVertex(parent, null, root.getChildren().get(1).getData(), 0, 0, 80, 30);Object vChild3 = graph.insertVertex(parent, null, root.getChildren().get(2).getData(), 0, 0, 80, 30);Object vChild4 =…
Which of the following is NOT a benefit of using the composite design pattern? A Client uses the same code for dealing with Leaves or Composites. B It encapsulates hierarchies by providing a common superclass for aggregate and leaf nodes. C Leaf-specific behavior can be modified without changing the hierarchy. D New types of leaves can be added without modifying existing code. E It shields a client from the low-level classes of a subsystem.
Give me the answer in one Visual Studio file, not Visual Studio Code - Give me full code near and simple Develop a C++ "doubly" linked list class of your own that can hold a series of signed shorts Develop the following functionality: Develop a linked list node struct/class You can use it as a subclass like in the book (Class contained inside a class) You can use it as its own separate class Your choice Maintain a private pointer to a node class pointer (head) Constructor Initialize head pointer to null Destructor Make sure to properly delete every node in your linked list push_front(value) Insert the value at the front of the linked list pop_front() Remove the node at the front of the linked list If empty, this is a no operation operator << Display the contents of the linked list just like you would print a character string operator [] Treat like an array Return the value stored in that element of the linked list If element doesn’t exist, return…
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A basic console program for car rental system is needed to be implemented by using linked list and tree in Java (Eclipse). The online rent a car system serves as a database storing available rental cars with their associated retailer. The system checks and shows a list of accessible rental cars to the user for a given time period. Then, they can book their desired car from the related store by using the program. The development language of the project is Java and 2 types of data structures are used: linked list and tree. All of the available option details of the cars are accumulated by linked lists and the customer information is stored in the tree.
C++ Add a new leaf node called nodeM which will possess the data value of M. Make this node the child of nodeB. Perform the findData function you created in #3, what can you observe about the output? /#3 #include<iostream>#include<queue>using namespace std; struct treeNode{ char dataItem; struct treeNode *firstChild; struct treeNode *nextSibling;}; /* Preorder Traversalpreorder (v)visit(v)for each child w of vpreorder(w)*/void preorder(treeNode *currNode, char KEY){ if(currNode != NULL) { if(currNode->dataItem == KEY) { cout<<"KEY: "<<KEY<< " was found!\n"; } preorder(currNode->firstChild, KEY); preorder(currNode->nextSibling, KEY); } return;} /*Inorder Traversalif(v==NULL) returninOrder(v.left)visit(v)inOrder(v.right)*/void inorder(treeNode *currNode, char KEY){ if(currNode != NULL) { if(currNode->dataItem == KEY) { cout<<"KEY:…
B. Project descriptionFor this project, you will create two ADTs:• A generic ADT Binary Search Tree• An ADT Class database: This ADT contains a list of class sections. Therefore, a class representing a class sectionmust be created.
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Q #3. Apply concepts of Advanced Data Structures to implement a Students Book as adoubly linked list. Each node in the Student Book will contain ‘Name’, ‘RegNumber’,‘CGPA and ‘Age’ of the student. Following operations can be performed on the StudentBook.• Constructor to create and Destructor to destroy the Student Book• Add a Student if it is not already present in the Book.• Delete a Student from the Book.• Search a Student in the Student Book using Name or Reg. Number. If founddisplay its details. If not found, display ‘Student not found’.• Display the Student details in forward and reverse order• In main (), define an object of type StudentBook. Get details of 10 student fromthe user and add to the StudentBook. Ask the user, if the user wants to display,search or delete a student and perform the required actions, accordingly.
A binary search tree is a data structure that consists of JavaScript objects called "nodes". A tree always has a root node which holds its own integer value property and can have up to two child nodes (or leaf nodes), a left and right property. A leaf node holds a value attribute and, likewise, a left and right attribute each potentially pointing to another node in the binary tree. Think of it as a javascript object with potentially more sub-objects referenced by the left and right attributes. There are certain rules that apply to a binary tree: A node's left leaf node has a value that is <= than to its own value A node's right leaf node has a value that is => its own value. In other words: let node = { value: left: right: = this object's value> } You will be writing a function called isPresent that takes two arguments: the root object and a value (number), and returns a boolean true if the value is present in the tree or false if it is not present. function isPresent(root,…
In Java I'm trying to make a Red Black Tree through inheritance with the Binary Tree I created (as provided along with the Binary Node) yet I'm having a lot of difficulty knowing where and how to start as well as how to override and even create the Insert and Remove functions for the Red Black Tree. Code and assistance in this topic will be greatly appreciated... here is the code I'm utilizing for this project. Binary Node I created: public class BinNode{private String data;private BinNode left;private BinNode right;private int height; //height fieldpublic BinNode(){data = "";left = null;right = null;}public int getHeight() {return height;}public void setHeight(int height) {this.height = height;}public BinNode(String d){data = d;left = null;right = null;}public void setData(String d){this.data = d;}public String getData(){return this.data;}public void setLeft(BinNode l){this.left = l;}public BinNode getLeft(){return this.left;}public void setRight(BinNode r){this.right = r;}public…
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