JAVA CONSTRUCTORS AND METHODS QUIZ

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();}}

Runtime Exception

Animal Wild

Compilation Error

Wild Animal

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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( ) ) ) ; }}

0.5

0.0

1.0

10.0

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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}}

One

Compilation succeed but no output.

Compilation fails due to an error on line 1

Compilation fails due to an error on line 2

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

instance variables

reference variables

objects

None of these

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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(5);

A a = new A(String s);

All of these

None of these

A a = new B();

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

Heap

Stack

Array

Storage Area

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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)); } }

The sum of x and y is 9

None of these

does not compile

The sum of x and y is 45

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

void

double

None of these

int

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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); }}

A B 8

A 5 B 8

None of these

A B 5

B 8 A 5

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What is the output for the below code ?1. public class A{2. int add(int i, int j){3. return i+j;4. }5. }6. public class B extends A{7. public static void main(String argv[]){8. short s = 9;9. System.out.println(add(s,6));10. }11.}

Compile fail due to error on line no 2

None of these

15

Compile fail due to error on line no 9

Compile fail due to error on line no 8

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