Which are valid declarations? (Choose all that apply.)

Given: 1. enum A { A } 2. class E2 { 3. enum B { B } 4. void C() { 5. enum D { D } 6. } 7. } Which statements are true? (Choose all that apply.)

package io; import java.io.*; public class TestFile { public static void main(String[] args) { File file = new File("test_file.txt"); System.out.print(" Fle Name = " + file.getName()); file.delete(); file.renameTo(new File("test_file2.txt")); System.out.print(" Fle Name = " + file.getName()); } }

package io; import java.io.*; public class TestFile1 { public static void main(String[] args) { //No file exists by the name test_file.txt File file = new File("test_file.txt"); System.out.print(" Fle Name = "+file.getName()); System.out.print(" File Status = "+file.exists()); } }

package inheritance; interface test_Int { void test(); } abstract class IntImplementer implements test_Int { public static void main(String[] args) { System.out.println("Hello World!"); } }

package inheritance; class X { Y b = new Y(); X() { System.out.print("X"); } } class Y { Y() { System.out.print("Y"); } } public class Z extends X { Y y = new Y(); Z() { System.out.print("Z"); } public static void main(String[] args) { new Z(); } }

Integer division by zero throws an exception.

package simplejava;public class TestConstructor{ int p ; public void TestConstructor(int p) { this.p=p; } public static void main(String[] args) { TestConstructor tp = new TestConstructor(10); TestConstructor tp = new TestConstructor(); System.out.println("p = "+tp.p); }}

package simplejava;public class TestMain { TestMain() { System.out.println("I am in Constructor"); } TestMain(String message) { System.out.println("Message " + message); } public static void main(String[] args) { TestMain tm = new TestMain(); } public static void main(String args) { TestMain tm = new TestMain("Hello"); }}

package simplejava;public class TestMain1 { TestMain1() { System.out.println("I am in Constructor"); } TestMain1(String message) { System.out.println("Message " + message); } public void main(String[] args) { TestMain1 nm = new TestMain1(); TestMain1 nm1 = new TestMain1("Hello"); }}

Are you allowed to have more than one top-level(non-inner) class definition per source file?

A class can define two methods with the same name as long as the return types are different