• You are maintaining a software and you come across the following method. Comment on its quality by pointing out problems that you see and rewrite the method by fixing them. (Note: Feel free to do the changes in multiple iterations if you find it easier.) public static void f(int[] a){ int t; for (int p = 0; p <= a. Length - 2; p++) {for (int i = 0; i <= a.Length - 2; i++){ if (a[i]> a[i+1]){ t = a[i+1]; a[i+1] = a[i]; a[i] = t; }}}

• You are maintaining a software and you come across the following method. Comment on its quality by pointing out problems that you see and rewrite the method by fixing them. (Note: Feel free to do the changes in multiple iterations if you find it easier.) public static void f(int[] a){ int t; for (int p = 0; p <= a. Length - 2; p++) {for (int i = 0; i <= a.Length - 2; i++){ if (a[i]> a[i+1]){ t = a[i+1]; a[i+1] = a[i]; a[i] = t; }}}

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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WRITE A JAVA PROGRAM Methods can be used to define reusable code and organize and simplify code. Problem:- Suppose that you need to find the sum of integers from 5 to 15, from 16 to 30, and from 31 to 39, respectively. Define a public static sum method that take two int parameters -> (int start, int end) In the method, use for loop to add all the number from start to end. Later, invoke the sum inside the main method. Do the sum for each a) 5 to 15; b) 16 to 30; and c) 31 to 39 separately and later print the results. Output: Sum from 5 to 15 is 110 Sum from 16 to 30 is 345 Sum from 31 to 39 is 315
Given an integer N, implement a Static method 'solution' with return type as 'void' in class 'ProblemSolution' displays N for N times. Input 7 Output 7 7 7 7 7 7 7 Where, There must be single space between 2 numbers. There should not any space after the last number. Assume that, N is within the range [0 to 10000].
An obvious continuation is to use random numbers to create namesfor the stars and planets. Instead of creating random strings of characters, names usually follow certain rules. Select a set of real-world names (e.g. from J.R.R. Tolkien’sworld) and invent a set of rules that they follow. Design and implement a methodthat creates new names based on the set of rules and random numbers.
In java, Write a method checks if a given matrix is a unit matrix. An N x N unit matrix is a matrix of N rows and N columns where all the diagonal elements are ‘1’s and all the remaining elements are ‘0’s. The method should take a 2D array of integers as argument and return a Boolean which is true/false depending on whether the matrix corresponding to the 2D array is a unit matrix or not. Test the method in the ‘main’ method. For problems asking for 'methods', you need to write the method, and the 'main' method which is used as a 'driver' to test the given method.
Using Java Programing, write a RainFall class that stores the total rainfall for each of 12 months into an array of doubles. The program should have methods that return the following: the total rainfall for the year the average monthly rainfall the month with the most rain, and the month with the least rain. Demonstrate the class in a complete program. Input Validation: Do not accept negative numbers for monthly rainfall figures.
Do the trace in detail and submit The source Code As Well From the following recursive method Trace (in details) the calling of the above method with any input from your choice such that thereturned value will be 19. public static int think(int x) {if(x<10)if(x%2!=0)return x;elsereturn 0;elseif(x%2!=0)return x%10 + think(x/10);elsereturn think(x/10);}
First, write a Java method isSequence that takes as parameters a non-empty 2-dimensional array of integers. The method checks whether the elements of the array are consecutive or not.Second, write a java methods printArray(int[][]a) that writes the elements of an array passed in parameter to the standard output.Finally, use the following main method to test your different methods:public class CheckSequence{public static void main(String[] args){int[][] array1 = {{5,6,7,8},{9,10,11,12},{13,14,15,16}, {17,18,19,20}};int[][] array2 = {{1, 3 , 2,4},{5,6,7,8},{9,10,11,12},{13,14,15,16}};if (isSequence(array1)){System.out.println("The following array elements are successive:");printArray(array1);}if (isSequence(array2)){System.out.println("The following array elements are successive:");printArray(array2);}}}
Write a Java class called ContainsInRange. This class defines a method called contains(), which takes as parameters an integer array a, an integer x, an int called start, as well as an int called end, and returns a boolean which is true if and only if x occurs in a at a position which is greater than or equal to start, and less than end. You must validate that start is less than or equal to end, and that both start and end are greater than or equal to 0, and less than or equal to a.length. Repeat the operation often.
I need help Note: It`s a python Class Implementationa) Implement a class PlayCard with three attributes, rank, suit, and players.b) Implement an init method with an optional parameter type: 1) Set the default value of rank to "queen", suit to "hearts" and players to 4.c) Implement a display method to print the values of rank, suit, and players as the example output below.d) Instantiate two objects of type PlayCard, treasure with arguments "king", "diamonds", 2, and banker without any arguments.e) Call display() to print rank, suit, and players of treasure and banker.Just make sure to precisely match the output format below.Write your code in the ANSWER area provided below (must include comments if using code is not covered in the course)Example OutputRSP: king | diamonds | 2RSP: queen | hearts | 4
Imagine you are reading in a stream of integers. Periodically, you wishto be able to look up the rank of a number x (the number of values less than or equal to x). Implement the data structures and algorithms to support these operations. That is, implement the method track(int x), which is called when each number is generated, and the method getRankOfNumber(int x), which returns the number of values less than or equal to x (not including x itself).EXAMPLEStream(in order of appearance):5, 1, 4, 4, 5, 9, 7, 13, 3getRankOfNumber(l) 0getRankOfNumber(3) 1getRankOfNumber(4) 3
You have a card on which the letter J is written on one side and K on the other. You want to seeall of the possible ways the card will land if you drop it n times. Write a recursive method thatprints each session of dropping the cards with J's and K's. For example if you drop it 4 times in agiven session, all possible ways to drop it are as follows (in exactly the specified order): (java code)
Write a method checks if a given matrix is a unit matrix. An N x N unit matrix is a matrix of N rows and N columns where all the diagonal elements are ‘1’s and all the remaining elements are ‘0’s. The method should take a 2D array of integers as argument and return a Boolean which is true/false depending on whether the matrix corresponding to the 2D array is a unit matrix or not. Test the method in the ‘main’ method. For problems asking for 'methods', you need to write the method, and the 'main' method which is used as a 'driver' to test the given method.