The variables declared in a class for the use of all methods of the class are called instance variables None of these objects reference variables TRUE ANSWER : ? YOUR ANSWER : ?
public class Test { }What is the prototype of the default constructor? Test( ) None of these public Test(void) Test(void) public Test( ) TRUE ANSWER : ? YOUR ANSWER : ?
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 Compilation fails due to an error on line 2 Compilation succeed but no output. One TRUE ANSWER : ? YOUR ANSWER : ?
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() throw IOException{} void examians() {} throws IOException examians() throws IOException{} void examians() throws IOException{} void examians(void) throws IOException{} TRUE ANSWER : ? YOUR ANSWER : ?
public class MyClass{ }For the above class(MyClass) what is the correct way of declaring constructor? MyClass(){} MyClass(void) {} public MyClass(){} 1 and 3 public MyClass(void){} TRUE ANSWER : ? YOUR ANSWER : ?
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();}} Compilation Error Runtime Exception Animal Wild Wild Animal TRUE ANSWER : ? YOUR ANSWER : ?
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 one two one Exception two one one Compilation Error TRUE ANSWER : ? YOUR ANSWER : ?
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()); }} None of these Prints 7 Prints 0 Prints 10 Compilation Fails TRUE ANSWER : ? YOUR ANSWER : ?
The following code contains one compilation error, find it?public class Test {Test() { } // line 1static void Test() { this(); } // line 2 public static void main(String[] args) { // line 3Test(); // line 4}} At line 1, constructor Tester must be marked public like its class At line 4 At line 3, compilation error, ambiguity problem, compiler can't determine whether a constructor At line 2, constructor call TRUE ANSWER : ? YOUR ANSWER : ?
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.} 15 Compile fail due to error on line no 8 None of these Compile fail due to error on line no 9 Compile fail due to error on line no 2 TRUE ANSWER : ? YOUR ANSWER : ?