
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Implement a simple dictionary using a hash table in Java (insert, delete, get) but storing key-value pairs.
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- Suppose you have a hash table of size N = 256, and you are using double hashing. The keys in your hash are 4-digit integers (0000 through 9999) and your hash function is h(k) = (k²)%N The second hash function (used for probing) is h₂(k) = (sum-of-digits (k) * 8)%N What are the first 4 values in the search sequence (starting with the home position) for a record with key k-2025?arrow_forwardDevelop a sort implementation that takes a linked list of nodes with String key values as argument and rearranges the nodes so that they appear in sorted order (returning a link to the node with the smallest key). Use 3-way string quicksort.arrow_forwardimport 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…arrow_forward
- from Library.javaQ: Write the class names with extends keyword linkedlist ?arrow_forwardSuppose you have a hash table with seven entries (indexed 0 through 6). This table uses open addressing with the hash function that maps each letter to its alphabet code (a = A = 0, etc.) modulo 7. Rehashing is accomplished using linear-probing with a jump of 1. Describe the state of the table after each of the letters D, a, d, H, a, and h are added to the table.arrow_forwardJava Code: Below is Parser.java and there are errors. getType() and getStart() is undefined for the type Optional<Token> and there is an error in addNode(). Make sure to get rid of all the errors in the code. Attached is images of the errors. Parser.java import java.text.ParseException;import java.util.LinkedList;import java.util.List;import java.util.Optional; import javax.swing.ActionMap; public class Parser { private TokenHandler tokenHandler; private LinkedList<Token> tokens; public Parser(LinkedList<Token> tokens) { this.tokenHandler = new TokenHandler(tokens); this.tokens = tokens; } public boolean AcceptSeparators() { boolean foundSeparator = false; while (tokenHandler.MoreTokens()) { Optional<Token> currentToken = tokenHandler.getCurrentToken(); if (currentToken.getType() == Token.TokenType.NEWLINE || currentToken.getType() == Token.TokenType.SEMICOLON) {…arrow_forward
- Without using the java collections interface (i.e. do not import java.util.List, LinkedList, etc. ) Write a java program that inserts a new String element (String newItem) into a linked list before another specified item (String itemToInsertBefore). For example if items "A", "B", "C" and "D" are in a linked list in that order and the below method is called, insertBefore("E", "C"), then "E" would be inserted before "C", making the final list to be "A", "B", "E", "C" and "D" with no nulls or blank elements or any elements missing or anything. It should work for all lenghths of linkedlists of Strings. public Boolean insertBefore(String newItem, String itemToInsertBefore) { // returns true if done successfully, else returns false if itemToInsertBefore cannot be found or some other error }arrow_forwardComplete and submit LinkedStack2.java with following: Inherit LinkedStack.java, implement StackInterface2.java Add String toString()method as specified in page 153, problem 28(a) Add int size()method as specified in page 153, problem 28(b) Add void popSome(int count)method as specified in page 153, problem 28(c) Add boolean swapStart()method as specified in page 153, problem 28(d) Add T poptop() method as specified in page 153, problem 28(e)arrow_forwardStore a dictionary of a limited set of words as a hash table. Implement a spell check program that, given an input text file, will check for the spelling using the hash table-based dictionary and in the case of misspelled words will correct the same.arrow_forward
- The exercise consists of Hashing. Note you are notallowed to rely on Java library classes in your implementation. Part 3Implement in Java a function that takes as input an integer n 2 and generates n differentstrings all hashing to the same value when the following hash function is used.public int hashCode(String s) { int hash = 0; int skip = Math.max(1, s.length() / 3); for (int i = 0; i < s.length(); i += skip) hash = (hash * 37) + s.charAt(i); return hash;}Assume ASCII characters. and please Briefly describe your implementation .arrow_forwardThink about how you search a dictionary: you start in themiddle either go left or go right until you find the word you’re looking foror can’t narrow the word list down any further. It’s possible to do thesame in a list of numbers. Write an algorithm that, given a list of numbersand a secret number to find, tells you where in the list (index) you canfind that number or tells you the number isn’t in the list.arrow_forward
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