Select five errors from the given programof10 class Omanstion3 E public int Oman ()System.out.printin ("Constructor of Oman");7 publicshowCapita1 ()8.System.out.println ("Muscat");10 }11 public void showLanguage ()9.12System.out.println ("Arabic");14 }15 }16 E class India extend Oman17 {18 public India ()1319{System.out.printin ("Construtor of India");21 )22 public void showLanguage ()2023{showLanguage () ;耳。24me here to search

Error 1: There is no datatype for the method showcapital in Oman class Error 2: There is no…

Select five errors from the given program 10 class Oman 2 3 E public int Oman () 4 System.out.println("Constructor of Oman"); 79 public showCapital (O System.out.println("Muscat"); 10 } 11 e public void showLanguage () 12 System.out.println ("Arabic"); 14} 13 15 16 class India extend Oman 17{ 18 public India () { System.out.println("Construtor of India"); 21} 22 public void showLanguage () 19 20 23 24 showLanguage ():

Select five errors from the given program 10 class Oman 2 3 E public int Oman () 4 System.out.println("Constructor of Oman"); 79 public showCapital (O System.out.println("Muscat"); 10 } 11 e public void showLanguage () 12 System.out.println ("Arabic"); 14} 13 15 16 class India extend Oman 17{ 18 public India () { System.out.println("Construtor of India"); 21} 22 public void showLanguage () 19 20 23 24 showLanguage ():

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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Please see the image and read carefully. Solve a) and c) questions. If possible then solve b) question.
For the code below: public class College extends Student { public static void main(String[ ] args) { new College( ); } public College ( ) { this(“First semester"); System.out.println( "Third year" ); } public College (string G ) { System.out.println(G); } } class Student extends S_info { public Student ( ) { System.out.println("Student No. 123"); } public Student (String S) { System.out.println(S); } } class S_info{ public S_info ( ) { System.out.println("student age: 21"); } } 1- Draw the diagram for the constructor chaining. 2- Put the values for the strings G and S. 3- Trace the output for the entire code.
Partial Question 3 Consider: class A { } public void doA() { } class B extends A { } public void doB () { } Which of the following are allowed? B x = new B(); x.doB(); A x = new A(); x.doA(); A x = new A(); x.doB(); B x = new B(); x.doA();
Consider :Cat c = new tiger();What will be the result of c.getWieght();
5) Consider the Clock class, which represents the passage of time. The tick() method adds one minute to the time on the clock. public class Clock ( public Clock () public void setHour (int x) (hour - x; } public void setMin (int x) public int getHour () public int getMin () (hour - minute = 0;} {minute - X: } (return hour; } (return minute; } public void tick () ++minute: if (minute >= 60) (minute minute 60; ++hour: hour hour 8 121 private int hour; private int minute; b) Write an overload method tick(int x) which adds x seconds to the time on the clock. Note that x might be greater than 60.
Question 7 Analyze the following code. // Program 1: public class Test{ public static void main(String[] args) { Object a1 = new A0); Object a 2 = new A0); System.out.println(a1.equals(a2)); } } class A { int x; public boolean equals(Object a) { = ((A)a).x; return this.x == } } // Program 2 public class Test{ public static void main(String[] args) { Object a 1 = new A0); Object a 2 = new A0); System.out.println(a1.equals(a2)); } class A { int x; public boolean equals(A a) { return this.x == a.x; } } Program 1 displays true and Program 2 displays true Program 1 displays false and Program 2 displays true Program 1 displays true and Program 2 displays false O Program 1 displays false and Program 2 displays false
public class A extends C { public void method1() { System.out.print("al "); } public String toString() { return "a"; } } public class B extends D { public void method2() { System.out.print("b2 "); } } public class C extends D { public void method1() { System.out.print("c1 "); } } public class D { public String toString() { return "d"; } public void method1() { System.out.print("d1 "); } public void method2() { System.out.print("d2 "); } } Consider the following code fragment: D[] elements (new B(), new A(), new D(), new C()}; for (int i = 0; i < elements.length; i++) { System.out.print (elements [i] + " "); elements [i].method1(); // part 1 // part 2 // part 3 elements [i].method2(); System.out.println(); } Note that one iteration of this loop prints on its own line with each of the three parts separated by a single space. elements[0] - B(): elements[1] - A(): elements[2] - D():
QUESTION 27 Given the following code, find the compile error (Choose all that apply). public class Test { public static void main(String[] args) { m(new Graduatestudent ()); m(new Student ()); m(new Person()); m(new Object()); } public static void m(Student x) { System.out.println(x.toString()); } class Graduatestudent extends Student { class Student extends Person { @Override public String tostring() { return "Student"; class Person extends Object { eOverride public String tostring() { return "Person"; m(new Student()) causes an error None of that m(new GraduateStudent()) causes an error m(new Object(0) causes an error m(new Person()) causes an error O O O
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methode code below abstract class Method { // declaration of variables protected int input; protected String output; // Abstract methods public abstract boolean isHard(); public abstract String specificWay(); public abstract void Method(); public abstract void Method(int input, String output); // Getter methods for the input field public int getInput() { return this.input; } // Setter methods for the input field public void setInput(int input) { this.input = input; } // Getter methods for the output field public String getOutput() { return this.output; } // Setter methods for the output field public void setOutput(String output) { this.output = output; } // Custom string representation of the object public String toString() { return "Method"; }}
Finish the constructor for the KickBall class. public class Ball { public double diameter; public Ball(double diam) { diameter = diam; public class KickBall extends Ball private Color ballColor; public KickBall(double diam, Color ballColor) {