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();}}

Wild Animal

Runtime Exception

Compilation Error

Animal Wild

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Which of these is a legal definition of a method named examveda assuming it throws IOException, and returns void. Also assume that the method does not take any arguments. Select the one correct answer.

void examians() {} throws IOException

void examians() throw IOException{}

void examians() throws IOException{}

examians() throws IOException{}

void examians(void) throws IOException{}

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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();

None of these

A a = new A(String s);

All of these

A a = new B(5);

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What is the expected output?public class Profile {private Profile(int w) { // line 1System.out.print(w);}public final Profile() { // line 5System.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 final

10 50

50

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

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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); }}

50

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

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

10 50

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Determine Output:class A{public static void method(int i){System.out.print("Method 1");}public static int method(String str){System.out.print("Method 2");return 0;}}public class Test{ public static void main(String args[]){A.method(5);}}

Compile time error as final method can't be overloaded

Method 1

None of these

Method 2

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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++; }}

1

None of these

Compilation Error

3

2

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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}}

Compilation fails due to an error on line 2

One

Compilation fails due to an error on line 1

Compilation succeed but no output.

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The implicit return type of a constructor is

There is no return type.

void

A class object in which it is defined.

None of these

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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 8

Compile fail due to error on line no 9

15

Compile fail due to error on line no 2

None of these

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