public class Test { }What is the prototype of the default constructor? Test(void) public Test( ) Test( ) public Test(void) None of these TRUE ANSWER : ? YOUR ANSWER : ?
The main method should be static for the reason None of these It can be accessed by every method or variable without any hindrance. It can be accessed easily by the class loader. It can be executed without creating any instance of the class. 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? 5 0 0 8 0 0 5 8 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); }} 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 TRUE ANSWER : ? YOUR ANSWER : ?
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); TRUE ANSWER : ? YOUR ANSWER : ?
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);}} Method 2 Compile time error as final method can't be overloaded None of these Method 1 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.} Compile fail due to error on line no 9 Compile fail due to error on line no 2 None of these Compile fail due to error on line no 8 15 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( ) ) ) ; }} 1.0 10.0 0.0 0.5 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. 1 and 3 3 and 4 2 and 4 1 and 2 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()); }} Compilation Fails Prints 7 None of these Prints 10 Prints 0 TRUE ANSWER : ? YOUR ANSWER : ?