Consider the following interface and class definitions: public interface A { public void m1(); public void m2(); } public interface B { public void m3(); } public interface C extends B { public void m1(); public void m2(); public void m4(); } public class X implements B { public void m3() { System.out.println("X m3"); } public void m1() { System.out.println("X m1"); } } public class Y implements A, B { public void m1() { System.out.println("Y m1"); } public void m2() { System.out.println("Y m2"); } public void m3() { System.out.println("Y m3"); } public void m4() { System.out.println(Y m4"); } } public class Z implements C { public void m1() { System.out.println("Z m1"); } public void m2() { System.out.println("Z m2"); } public void m3() { System.out.println("Z m3"); } public void m4() { System.out.println("Z m4"); } } Assume the following variables are created. X x = new X(); Y y = new Y(); Z z = new Z(); A a = new Y(); B b = new X(); B b2 = new Y(); C c = new Z(); Write the result of the following lines in the answer box below, where your answer on line n corresponds to the result of line n here. If output is produced, write the output (without quotes). If the line doesn't compile, write "DNC" (capitalized and without quotes). x.m3(); y.m2(); z.m1(); z.m4(); a.m1(); a.m3(); b.m3(); b2.m2(); c.m4(); c.m1();

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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Question

Consider the following interface and class definitions:

public interface A { public void m1(); public void m2(); } public interface B { public void m3(); } public interface C extends B { public void m1(); public void m2(); public void m4(); } public class X implements B { public void m3() { System.out.println("X m3"); } public void m1() { System.out.println("X m1"); } } public class Y implements A, B { public void m1() { System.out.println("Y m1"); } public void m2() { System.out.println("Y m2"); } public void m3() { System.out.println("Y m3"); } public void m4() { System.out.println(Y m4"); } } public class Z implements C { public void m1() { System.out.println("Z m1"); } public void m2() { System.out.println("Z m2"); } public void m3() { System.out.println("Z m3"); } public void m4() { System.out.println("Z m4"); } }

Assume the following variables are created.

X x = new X(); Y y = new Y(); Z z = new Z(); A a = new Y(); B b = new X(); B b2 = new Y(); C c = new Z();

Write the result of the following lines in the answer box below, where your answer on line n corresponds to the result of line n here. If output is produced, write the output (without quotes). If the line doesn't compile, write "DNC" (capitalized and without quotes).

x.m3();

y.m2();

z.m1();

z.m4();

a.m1();

a.m3();

b.m3();

b2.m2();

c.m4();

c.m1();

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