Q3. Given the following definitions of classes AA and BB. What is the output of the Test program? class AA { private void f() { System.out.print( "AA.f "); protected void g() { System.out.print( "AA.g " ); public void h() { f(); g(); System.out.print( "AA.h "); class BB extends AA { private void f() { System.out.print( "BB.f " ); public void g() { System.out.print( "BB.g ) ; class Test { public static void main ( String[) args ) { BB bb = new BB () ; bb.h(); A. BB.f BB.g AA.h B. AA.f AA.g AA.h С. .f AA.g AA.h D. AA.f BB.g AA.h E. The program causes compile-time error.

Q3. Given the following definitions of classes AA and BB. What is the output of the Test program? class AA { private void f() { System.out.print( "AA.f "); protected void g() { System.out.print( "AA.g " ); public void h() { f(); g(); System.out.print( "AA.h "); class BB extends AA { private void f() { System.out.print( "BB.f " ); public void g() { System.out.print( "BB.g ) ; class Test { public static void main ( String[) args ) { BB bb = new BB () ; bb.h(); A. BB.f BB.g AA.h B. AA.f AA.g AA.h С. .f AA.g AA.h D. AA.f BB.g AA.h E. The program causes compile-time error.

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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A1. Find the output of the following code in order. public class Faculty extends Employee ( E public static void main (String[) args) ( new Faculty () : System.out.println("GCood Luck") public Faculty () ( System.out.println(" Eaculty's no-arg constructor is invoked"): class Employee extends Person ( public Employee () ( System.ont.println( Employee's no-arg constructor is invoked") class Person ( public Person () ( this ("Invoke Person s overloaded constructor"); System.oub.println('Person s no-arg constructor is invoked"); public Person (String s) ( System.out.println(s) ロ

[CLO-4] Consider the following classes: package p1; public class Child extends Parent{ private int a; package p1; public Child(){ public class Parent{ System.out.println("In Child"); } private int x; public int y; public Child(int a){ protected int z; int w; this.a = a; System.out.print("In Child with parameter"); } public Parent() { System.out.println("In Parent"); public void print() { } // 1 public void print() { System.out.print(a); // 2 System.out.print(x + +y); } System.out.print(x); // 3 }// end class System.out.print(z); // 4 System.out.print(w); JULL IU 11 12 13 14 In the method print() of the child class. Which statement is illegal ?? O // 2 System.out.print (x); // 2 System.out.print (x); // 4 System.out.print (w); // 2 System.out.print (x); // 3 System.out.print (z); // 4 System.out.print (w); // 2 System.out.print (x); // 3 System.out.print (z); O All statements are illegal. // 1 System.out.print (a); // 2 System.out.print (x); O O ال-ال- } }// end class CamScanner
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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();
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.
use the following partial class definitions:public class A1{public int x;private int y;public int z;…}public class A2 extends A1{public int a;private int b; …}public class A3 extends A2{private int q;…} 2) Which of the following lists of instance data are accessible in class A2?a) x, y, z, a, bb) x, y, z, ac) x, z, a, bd) z, a, be) a, b
Problem 4) Suppose the following Course class is given: public class Course { private String name;//such as CS, MATH, etc private int grades[];//list of the grades //default and initial valued constructor //all other methods public double average() { double sum=0; for(int i=0;i=90) System.out.printf("me is a student with A letter-grade\n");
Instructions-Java Assignment is to define a class named Address. The Address class will have three private instance variables: an int named street_number a String named street_name and a String named state. Write three constructors for the Address class: an empty constructor (no input parameters) that initializes the three instance variables with default values of your choice, a constructor that takes the street values as input but defaults the state to "Arizona", and a constructor that takes all three pieces of information as input Next create a driver class named Main.java. Put public static void main here and test out your class by creating three instances of Address, one using each of the constructors. You can choose the particular address values that are used. I recommend you make them up and do not use actual addresses. Run your code to make sure it works. Next add the following public methods to the Address class and test them from main as you go: Write getters and…
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Consider the following classes Package p1; Package p2; Package p2; Package p1; public class C1{ public class C2{ public class C3 { public class C4 extends C3{ public double age3; private String name; protected double salary; String major; void find(X void serach(){ void claculate(){ void compute(){ a) What are the methods that can access the variable age. b) What are the methods that can access the variable name. c) What are the methods that can access the variable salary. d) What are the methods that can access the variable major
3. Consider the following two classes and write down the output of the following code: public class Test extends G{ void display() { String s = m1(); System.out.println("My name is "+ s); i - 7; j = j + i; } void show(){ System.out.println(" j value is - } public static void main(String args[]) { Test t - new Test(); System.out.println("s value is = t.display(); t.i = 9; System.out.println("i value in the object="+t.i); System.out.println("j value in the object="+t.j); t.show(); } abstract class G{ String s - "Exam"; int i = 10; int j - 5; String m1(){ s = "Java"; return s; abstract void display(); abstract void show( ); } " + j); + t.s);
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