Declaration and Access Control Determine output:class A{{System.out.print("b1 ");}public A(){System.out.print("b2 ");}}class B extends A{static{System.out.print("r1 ");}public B(){System.out.print("r2 ");}{System.out.print("r3 ");}static{System.out.print("r4 ");}}public class Test extends B{public static void main(String[] args){System.out.print("pre ");new Test();System.out.println("post ");}} r1 r4 pre b1 b2 post r3 r2 pre r1 r4 b1 b2 r2 r3 post Compilation fail r1 r4 pre b1 b2 r3 r2 post r1 r4 pre b1 b2 post r1 r4 pre b1 b2 post r3 r2 pre r1 r4 b1 b2 r2 r3 post Compilation fail r1 r4 pre b1 b2 r3 r2 post r1 r4 pre b1 b2 post 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? From within protected methods you do not have access to public methods. This method is only accessible from inside the class itself and from inside all subclasses. 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. From within protected methods you do not have access to public methods. This method is only accessible from inside the class itself and from inside all subclasses. 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. ANSWER DOWNLOAD EXAMIANS APP
Declaration and Access Control A package is a collection of Editing tools Classes Editing tools and Interfaces Interfaces Classes and Interfaces Editing tools Classes Editing tools and Interfaces Interfaces Classes and Interfaces ANSWER DOWNLOAD EXAMIANS APP
Declaration and Access Control A method within a class is only accessible by classes that are defined within the same package as the class of the method. Which one of the following is used to enforce such restriction? Declare the method with the keyword private. Declare the method with the keyword protected. Declare the method with the keyword public. Do not declare the method with any accessibility modifiers. Declare the method with the keyword public and private. Declare the method with the keyword private. Declare the method with the keyword protected. Declare the method with the keyword public. Do not declare the method with any accessibility modifiers. Declare the method with the keyword public and private. ANSWER DOWNLOAD EXAMIANS APP
Declaration and Access Control What is the result of compiling and running the following code?class Base{ private Base(){ System.out.print("Base"); }}public class test extends Base{ public test(){ System.out.print("Derived"); } public static void main(String[] args){ new test(); }} Exception is thrown at runtime Compilation Error Derived BaseDerived Exception is thrown at runtime Compilation Error Derived BaseDerived 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. Any class that extends Test. None of these Any class in com.mypackage package. Only the Test class. Any class. Any class that extends Test. None of these Any class in com.mypackage package. Only the Test class. ANSWER DOWNLOAD EXAMIANS APP
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