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JAVA Constructors and Methods

JAVA Constructors and Methods
public class Test { }What is the prototype of the default constructor?

public Test( )
None of these
public Test(void)
Test(void)
Test( )

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JAVA Constructors and Methods
Which of the following options is the best for generating random integer 0 or 1?

(int)Math.random()
(int)(Math.random() + 0.2)
(int)(Math.random() + 0.5)
(int)Math.random() + 1

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JAVA Constructors and Methods
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?

5 8
5 0
0 0
0 8

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JAVA Constructors and Methods
Which of the modifier can't be used for constructors?

protected
public
private
static

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JAVA Constructors and Methods
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();}}

Compilation Error
Animal Wild
Wild Animal
Runtime Exception

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JAVA Constructors and Methods
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 A(String s);
A a = new B();
A a = new B(5);
All of these
None of these

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