DECLARATION AND ACCESS CONTROL QUIZ

What will be the output?public class Test{ public static void main(String[] args){ String value = "abc"; changeValue(value); System.out.println(value); } public static void changeValue(String a){ a = "xyz"; }}

None of these

xyz

Compilation clean but no output

abc

Compilation fails

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A package is a collection of

Editing tools and Interfaces

Interfaces

Classes and Interfaces

Editing tools

Classes

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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();}}

49

Compile error at line 4 (invalid argument type for method main)

Compile error at line 2 (must access x by writing Tester.x)

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)

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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.

Do not declare the method with any accessibility modifiers.

Declare the method with the keyword public.

Declare the method with the keyword protected.

Declare the method with the keyword public and private.

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What will be the output for the below code?static public class Test{ public static void main(String[] args){ char c = 'a'; switch(c){ case 65 : System.out.println("one");break; case 'a': System.out.println("two");break; case 3 : System.out.println("three"); } }}

two

Compile error - Illegal modifier for the class Test; only public, abstract & final are permitted.

Compile error - char can't be permitted in switch statement.

one

None of these

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The object is created with new keyword

At run-time

None of these

Depends on the code

At Compile-time

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Choose the correct statementpublic class Circle{ private double radius; public Circle(double radius){ radius = radius; }}

The program has a compilation error because we cannot assign radius to radius.

The program has a compilation error because it does not have a main method.

The program does not compile because Circle does not have a default constructor.

The program will compile, but we cannot create an object of Circle with a specified radius. The object will always have radius 0.

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What can directly access and change the value of the variable qusNo?package com.mypackage;public class Test{ private int qusNo = 100;}

Any class that extends Test.

Only the Test class.

None of these

Any class in com.mypackage package.

Any class.

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What is the result of compiling and running the following code?public class Tester{static int x = 4;public Tester(){System.out.print(this.x); // line 1Tester();}public static void Tester(){ // line 2System.out.print(this.x); // line 3}public static void main(String... args){ // line 4new Tester();}}

Compile error at line 1 (static x must be only accessed inside static methods)

Compile error at line 4 (invalid argument type for method main )

44

Compile error at line 2 (constructors can't be static)

Compile error at line 3 (static methods can't invoke this)

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What is the output for the below code ?public class A{ static{ System.out.println("static"); } { System.out.println("block"); } public A(){ System.out.println("A"); } public static void main(String[] args){ A a = new A(); }}

A

A block static

None of these

static block A

static A

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