Declaration and Access Control A package is a collection of Editing tools and Interfaces Classes Interfaces Classes and Interfaces Editing tools Editing tools and Interfaces Classes Interfaces Classes and Interfaces Editing tools ANSWER DOWNLOAD EXAMIANS APP
Declaration and Access Control What is the result of compiling and running the following code?public class Tester{static int x = 4;int y = 9; public Tester(){System.out.print(this.x); // line 1printVariables();}public static void printVariables(){System.out.print(x); // line 2System.out.print(y); // line 3}public static void main(String... args) { // line 4new Tester();}} Compile error at line 3 (static methods can't make reference to non-static variables) Compile error at line 1 (static x must be only accessed inside static methods) Compile error at line 2 (must access x by writing Tester.x) Compile error at line 4 (invalid argument type for method main) 49 Compile error at line 3 (static methods can't make reference to non-static variables) Compile error at line 1 (static x must be only accessed inside static methods) Compile error at line 2 (must access x by writing Tester.x) Compile error at line 4 (invalid argument type for method main) 49 ANSWER DOWNLOAD EXAMIANS APP
Declaration and Access Control Which statements are most accurate regarding the following classes?class A{ private int i; protected int j;}class B extends A{ private int k; protected int m;} An object of B contains data fields j, m. An object of B contains data fields i, j, k, m. An object of B contains data fields k, m. An object of B contains data fields j, k, m. An object of B contains data fields j, m. An object of B contains data fields i, j, k, m. An object of B contains data fields k, m. An object of B contains data fields j, k, m. ANSWER DOWNLOAD EXAMIANS APP
Declaration and Access Control Determine Output:class MyClass{ static final int a = 20; static final void call(){ System.out.println("two"); } static{ System.out.println("one"); }}public class Test{ public static void main(String args[]){ System.out.println(MyClass.a); }} one two 20 20 one two one one 20 one two 20 20 one two one one 20 ANSWER DOWNLOAD EXAMIANS APP
Declaration and Access Control Suppose a class has public visibility. In this class we define a protected method. Which of the following statements is correct? In a class, you cannot declare methods with a lower visibility than the visibility of the class in which it is defined. This method is only accessible from inside the class itself and from inside all subclasses. From within protected methods you do not have access to public methods. This method is accessible from within the class itself and from within all classes defined in the same package as the class itself. In a class, you cannot declare methods with a lower visibility than the visibility of the class in which it is defined. This method is only accessible from inside the class itself and from inside all subclasses. From within protected methods you do not have access to public methods. This method is accessible from within the class itself and from within all classes defined in the same package as the class itself. ANSWER DOWNLOAD EXAMIANS APP
Declaration and Access Control What can directly access and change the value of the variable qusNo?package com.mypackage;public class Test{ private int qusNo = 100;} Any class. Only the Test class. None of these Any class in com.mypackage package. Any class that extends Test. Any class. Only the Test class. None of these Any class in com.mypackage package. Any class that extends Test. ANSWER DOWNLOAD EXAMIANS APP
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