JAVA CONSTRUCTORS AND METHODS QUIZ

What is the expected output?public class Profile { private Profile(int w) { // line 1 System.out.print(w); } public static Profile() { // line 5 System.out.print (10); } public static void main(String args[]) { Profile obj = new Profile(50); }}

Won't compile because of line (5), constructor can't be static

10 50

50

Won't compile because of line (1), constructor can't be private

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What will be the return type of a method that not returns any value?

None of these

double

int

void

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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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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); }}

long

None of these

int

Compilation fails

Compilation clean but throws RuntimeException

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class MyClass{ MyClass(){ System.out.print("one"); } public void myMethod(){ this(); System.out.print("two"); }} public class TestClass{ public static void main(String args[]){ MyClass obj = new MyClass(); obj.myMethod(); }}

one one two

Compilation Error

two one one

one Exception

None of these

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The implicit return type of a constructor is

None of these

A class object in which it is defined.

void

There is no return type.

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What is Math.floor(3.6)?

4

3.0

4.0

3

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

public MyClass(void){}

public MyClass(){}

MyClass(void) {}

1 and 3

MyClass(){}

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What is the output of the program?class Test{ public int display(int x, int y){ return ("The sum of x and y is " + x + y); } public static void main(String args[]){ Test test = new Test(); System.out.println(test.display(4,5)); } }

None of these

The sum of x and y is 45

The sum of x and y is 9

does not compile

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Which of the modifier can't be used for constructors?

public

static

private

protected

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