DECLARATION AND ACCESS CONTROL QUIZ

What will be the output after the following program is compiled and executed?public class Test{ public static void main(String args[]){ int x = 10; x = myMethod(x--); System.out.print(x); } static int myMethod(final int x){ return x--; }}

The program will lead to compilation error.

None of these

The will compile successfully and display 9 as output.

The program will compile successfully and display 10 as output.

The program will lead to runtime error.

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What will be the output for the below code?public class Test{ static{ int a = 5; } public static void main(String[] args){ System.out.println(a); }}

None of these

5

0

Compile with error

Runtime Exception

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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();}}

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 4 (invalid argument type for method main)

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

49

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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

one two 20

one 20

one two

20

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Suppose a class has public visibility. In this class we define a protected method. Which of the following statements is correct?

This method is accessible from within the class itself and from within all classes defined in the same package as the class itself.

From within protected methods you do not have access to public methods.

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.

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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

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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?

Do not declare the method with any accessibility modifiers.

Declare the method with the keyword private.

Declare the method with the keyword public.

Declare the method with the keyword public and private.

Declare the method with the keyword protected.

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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"); } }}

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

two

None of these

one

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

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Choose all the lines which if inserted independently instead of "//insert code here" will allow the following code to compile:public class Test{ public static void main(String args[]){ add(); add(1);add(1, 2); }// insert code here}

static void add(int...args){}

void add(Integer... args){}

static void add(int... args, int y){}

static void add(int[]... args){}

static void add(int args...){}

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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 3 (static methods can't invoke this)

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

44

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 )

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