The finalize() method is called just prior to A variable goes out of scope. An object or variable goes out of scope. An object, variable or method goes out of scope. None of these Before garbage collection. TRUE ANSWER : ? YOUR ANSWER : ?
In which area of memory, the system stores parameters and local variables whenever a method is invoked? Storage Area Array Heap Stack 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(); }} two one one one one two None of these one Exception Compilation Error 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 2 One Compilation succeed but no output. Compilation fails due to an error on line 1 TRUE ANSWER : ? YOUR ANSWER : ?
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);}} 10 50 50 Won't compile because of line (5); constructor can't be final Won't compile because of line (1); constructor can't be private 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 1 and 3 1 and 2 3 and 4 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 2, constructor call At line 3, compilation error, ambiguity problem, compiler can't determine whether a constructor At line 1, constructor Tester must be marked public like its class At line 4 TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following options is the best for generating random integer 0 or 1? (int)(Math.random() + 0.5) (int)(Math.random() + 0.2) (int)Math.random() (int)Math.random() + 1 TRUE ANSWER : ? YOUR ANSWER : ?
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++; }} 3 2 Compilation Error None of these 1 TRUE ANSWER : ? YOUR ANSWER : ?
What is the output for the below code?public class Test{ public static void printValue(int i, int j, int k){ System.out.println("int"); } public static void printValue(byte...b){ System.out.println("long"); } public static void main(String... args){ byte b = 9; printValue(b,b,b); }} Compilation fails Compilation clean but throws RuntimeException None of these int long TRUE ANSWER : ? YOUR ANSWER : ?