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JAVA Constructors and Methods

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

protected
private
public
static

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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 ?

All of these
A a = new B(5);
A a = new A(String s);
None of these
A a = new B();

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JAVA Constructors and Methods
The variables declared in a class for the use of all methods of the class are called

reference variables
objects
instance variables
None of these

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JAVA Constructors and Methods
What will be the result of compiling and running the given code?class A{ int b=10; private A(){ this.b=7; } int f(){ return b; }}class B extends A{ int b;}public class Test{ public static void main(String[] args){ A a = new B(); System.out.println(a.f()); }}

Prints 7
Prints 0
Prints 10
None of these
Compilation Fails

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JAVA Constructors and Methods
Determine output:public class Test{ public static void main(String args[]){ MyClass obj = new MyClass(); obj.val = 1; obj.call(obj); System.out.println(obj.val); }}class MyClass{ public int val; public void call(MyClass ref){ ref.val++; }}

3
2
None of these
Compilation Error
1

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

Array
Stack
Storage Area
Heap

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