Which of the following options is the best for generating random integer 0 or 1? (int)Math.random() (int)Math.random() + 1 (int)(Math.random() + 0.5) (int)(Math.random() + 0.2) TRUE ANSWER : ? YOUR ANSWER : ?
What is the output of the above program ?class Num { Num(double x ){ System.out.println( x ) ; } }public class Test extends Num { public static void main(String[] args){ Num num = new Num( 2 ) ; } } Compile time error 2.0 None of these 0 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 two one one Compilation Error one one two one Exception TRUE ANSWER : ? YOUR ANSWER : ?
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 (1), constructor can't be private 50 10 50 Won't compile because of line (5), constructor can't be static 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();}} Animal Wild Runtime Exception Wild Animal Compilation Error TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following statements regarding static methods are correct?1. Static methods are difficult to maintain, because you can not change their implementation.2. Static methods can be called using an object reference to an object of the class in which this method is defined.3. Static methods are always public, because they are defined at class-level.4. Static methods do not have direct access to non-static methods which are defined inside the same class. 2 and 4 3 and 4 1 and 3 1 and 2 TRUE ANSWER : ? YOUR ANSWER : ?
Determine output of the following program.public class Test{ public static void main(String args[]){ System.out.println( Math.floor( Math.random( ) ) ) ; }} 0.0 10.0 0.5 1.0 TRUE ANSWER : ? YOUR ANSWER : ?
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 8 5 0 5 8 0 0 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()); }} Prints 7 None of these Compilation Fails Prints 0 Prints 10 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.} None of these Compile fail due to error on line no 9 Compile fail due to error on line no 8 Compile fail due to error on line no 2 15 TRUE ANSWER : ? YOUR ANSWER : ?