JAVA CONSTRUCTORS AND METHODS QUIZ

Given the following piece of code:class Person{ public int number;}public class Test{ public void doIt(int i , Person p){ i = 5; p.number = 8; } public static void main(String args[]){ int x = 0; Person p = new Person(); new Test().doIt(x, p); System.out.println(x + " " + p.number); }}What is the result?

0 8

5 0

0 0

5 8

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What is the output for the below code?public class Test{ public static void printValue(int i, int j, int k){ System.out.println("int"); } public static void printValue(byte...b){ System.out.println("long"); } public static void main(String... args){ byte b = 9; printValue(b,b,b); }}

None of these

long

Compilation clean but throws RuntimeException

int

Compilation fails

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The following code contains one compilation error, find it?public class Test {Test() { } // line 1static void Test() { this(); } // line 2 public static void main(String[] args) { // line 3Test(); // line 4}}

At line 3, compilation error, ambiguity problem, compiler can't determine whether a constructor

At line 1, constructor Tester must be marked public like its class

At line 2, constructor call

At line 4

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What is the expected output?class Animal {Animal() {System.out.println("Animal");}}class Wild extends Animal{Wild() {System.out.println("Wild");super();}}public class Test {public static void main(String args[]) {Wild wild = new Wild();}}

Wild Animal

Runtime Exception

Animal Wild

Compilation Error

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class A{ A(String s){} A(){}}1. class B extends A{2. B(){}3. B(String s){4. super(s);5. }6. void test(){7. // insert code here8. }9. }Which of the below code can be insert at line 7 to make clean compilation ?

A a = new B();

All of these

A a = new B(5);

A a = new A(String s);

None of these

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In which area of memory, the system stores parameters and local variables whenever a method is invoked?

Stack

Array

Storage Area

Heap

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public class MyClass{ }For the above class(MyClass) what is the correct way of declaring constructor?

MyClass(){}

1 and 3

MyClass(void) {}

public MyClass(){}

public MyClass(void){}

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What is the output of the above program ?class Num { Num(double x ){ System.out.println( x ) ; } }public class Test extends Num { public static void main(String[] args){ Num num = new Num( 2 ) ; } }

None of these

0

2.0

Compile time error

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Determine output of the following program.public class Test{ public static void main(String args[]){ System.out.println( Math.floor( Math.random( ) ) ) ; }}

10.0

1.0

0.0

0.5

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The implicit return type of a constructor is

There is no return type.

A class object in which it is defined.

void

None of these

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