JAVA CONSTRUCTORS AND METHODS QUIZ

class MyClass{int i;int j;public MyClass(int i, int j){this.i = i;this.j = j;}public void call(){System.out.print("One");}}public class Test{public static void main(String args[]){MyClass m = new MyClass(); //line 1m.call(); //line 2}}

Compilation fails due to an error on line 1

One

Compilation succeed but no output.

Compilation fails due to an error on line 2

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What is the output for the below code ?class A{ public A(){ System.out.println("A"); } public A(int i){ this(); System.out.println(i); }}class B extends A{ public B(){ System.out.println("B"); } public B(int i){ this(); System.out.println(i+3); }}public class Test{ public static void main (String[] args){ new B(5); }}

None of these

A B 8

A 5 B 8

A B 5

B 8 A 5

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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(); }}

None of these

one Exception

one one two

Compilation Error

two one one

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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() + 1

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

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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); }}

10 50

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

50

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

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The variables declared in a class for the use of all methods of the class are called

objects

instance variables

reference variables

None of these

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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( ) ) ) ; }}

1.0

0.0

0.5

10.0

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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 0

5 0

5 8

0 8

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What is Math.floor(3.6)?

3.0

4.0

4

3

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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 0

Compilation Fails

Prints 10

None of these

Prints 7

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