For what value of the parameter į would the return of this method be 8 given that value of j =1? If there is more than one such value, write any one of them (and only one) as your answer. public int method (int i, int j) { int[][] a = {{ 2, 4, 6 },{ 1, 3 }, {7, 8},{11, 12, 13, 14 }}; %3D return a[i][j]; }

For what value of the parameter į would the return of this method be 8 given that value of j =1? If there is more than one such value, write any one of them (and only one) as your answer. public int method (int i, int j) { int[][] a = {{ 2, 4, 6 },{ 1, 3 }, {7, 8},{11, 12, 13, 14 }}; %3D return a[i][j]; }

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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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.
Write a method which takes an integer ‘N’ as argument, and generates the ‘Pascal triangle’ of height ‘N’, and returns it. ‘Pascal triangle’ is a triangular array of binomial coefficients. An example with N = 5 is shown below. Hint: The value of a non-boundary element is related to the elements above and above-left. Test the method in the ‘main’ method. 1 1 1 1 2 1 1 3 3 1 1 4 6 4 1 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.
Given two intervals (a1, b1) and (a2, b2) on the real number line, write a method overlap to determine if they overlap or not. For example, (2.7, 5.3) and (4.8, 12.2) overlap, (3.4, 6.6) and (6.6, 7.3) do not overlap, while (2.7, 5.3) and (7.1, 9.5) do not overlap. Each interval is represented by an array of two real numbers, and the method returns a Boolean. 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.
Write a program with a main() method that asks the user to input an integer array of 10 elements.Next, create three methods described below. From inside your main() method, call each of thethree methods described below and print out the results of the methods 2, 3, which return values. 1. printReverse() - a method that receives an array of integers, then reverses the elements ofthe array and prints out all the elements from inside the method. Print all in one lineseparated by commas (see sample output below). Do not print the ‘trailing’ comma!!2. getLargest() – a method that receives an array of integers, then returns the largest integervalue in the array. Return largest integer and print from main(), not method.3. computeTwice()- a method that receives the previously reversed array of integers, thenreturns an array of integers which doubles the value of each number in the array (see thesample output below). Return new array of integers print from main(), not methodEXAMPLE OUTPUT:Enter…
Write a JAVA CODE with a main() method that asks the user to input an integer array of 10 elements.Next, create three methods described below. From inside your main() method, call each of thethree methods described below and print out the results of the methods 2, 3, which return values. 1. printReverse() - a method that receives an array of integers, then reverses the elements ofthe array and prints out all the elements from inside the method. Print all in one lineseparated by commas (see sample output below). Do not print the ‘trailing’ comma!!2. getLargest() – a method that receives an array of integers, then returns the largest integervalue in the array. Return largest integer and print from main(), not method.3. computeTwice()- a method that receives the previously reversed array of integers, thenreturns an array of integers which doubles the value of each number in the array (see thesample output below). Return new array of integers print from main(), not method.. USING A JAVA…
Write a JAVA CODE with a main() method that asks the user to input an integer array of 10 elements.Next, create three methods described below. From inside your main() method, call each of thethree methods described below and print out the results of the methods 2, 3, which return values. 1. printReverse() - a method that receives an array of integers, then reverses the elements ofthe array and prints out all the elements from inside the method. Print all in one lineseparated by commas (see sample output below). Do not print the ‘trailing’ comma!!2. getLargest() – a method that receives an array of integers, then returns the largest integervalue in the array. Return largest integer and print from main(), not method.3. computeTwice()- a method that receives the previously reversed array of integers, thenreturns an array of integers which doubles the value of each number in the array (see thesample output below). Return new array of integers print from main(), not method.. THE OUTPUT…
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Assume that we want to swap the values of two integer -variables, a andb. To do this, we write a method public void swap(int i1, int i2){int tmp = i1; i1 = i2; i2 = tmp;}Then we call this method with our a and b variables:swap(a, b);Are a and b swapped after this call? If you test it, you will notice that they are not! Why does this not work? Explain in detail.
Implement a method rand7 () given rand S (). That is, given a method that generates a random number between O and 4 (inclusive), write a method that generates a random number between O and 6 (inclusive)
Write a Java program that expands a given binomial (x + y)^n, where integer n is user input. To do the work of the binomial expression, first create a method that accepts n as a parameter and then returns an array holding the coefficients needed for the binomial expansion using the Pascal’s Triangle method. Create a 2nd method which takes the array holding the coefficients as a parameter and prints the appropriate binomial expansion. For example, if n = 5 is entered by the user, the method calculating the coefficients should return {1,5,10,10,5,1} and the method that prints the expansion should print the following: (x + y)^5 = x^5 + 5x^4y + 10x^3y^2 + 10x^2y^3 + 5xy^4 + y^5 Your main method should use an appropriate loop for repeated inputs and automatically call the methods to calculate the coefficients and print the binomial expansion. There isn’t a need for a menu although you should ask the user if they want to quit or continue after their binomial expansion is printed each time.…
Write a java method named findLargest that returns the largest number stored in it's parameter, an array of int value.
Write a program that stores a phrase as an array of words, and then prints it backward. The main method calls method getInput , which asks the user how many words there are, stores them in an array, and returns this array. printBackwards then take this array of words and prints it in reverse. For example, if the words were "Today" "is" "Monday" your method will print "Monday is Today"