Suppose a class has public visibility. In this class we define a protected method. Which of the following statements is correct? In a class, you cannot declare methods with a lower visibility than the visibility of the class in which it is defined. From within protected methods you do not have access to public methods. This method is only accessible from inside the class itself and from inside all subclasses. This method is accessible from within the class itself and from within all classes defined in the same package as the class itself. TRUE ANSWER : ? YOUR ANSWER : ?
A package is a collection of Classes and Interfaces Editing tools Editing tools and Interfaces Classes Interfaces TRUE ANSWER : ? YOUR ANSWER : ?
Determine output:class A{{System.out.print("b1 ");}public A(){System.out.print("b2 ");}}class B extends A{static{System.out.print("r1 ");}public B(){System.out.print("r2 ");}{System.out.print("r3 ");}static{System.out.print("r4 ");}}public class Test extends B{public static void main(String[] args){System.out.print("pre ");new Test();System.out.println("post ");}} r1 r4 pre b1 b2 r3 r2 post r1 r4 pre b1 b2 post r1 r4 pre b1 b2 post r3 r2 Compilation fail pre r1 r4 b1 b2 r2 r3 post TRUE ANSWER : ? YOUR ANSWER : ?
The object is created with new keyword At run-time At Compile-time None of these Depends on the code TRUE ANSWER : ? YOUR ANSWER : ?
What is the result of compiling and running the following code?public class Tester{static int x = 4;int y = 9; public Tester(){System.out.print(this.x); // line 1printVariables();}public static void printVariables(){System.out.print(x); // line 2System.out.print(y); // line 3}public static void main(String... args) { // line 4new Tester();}} Compile error at line 3 (static methods can't make reference to non-static variables) Compile error at line 1 (static x must be only accessed inside static methods) Compile error at line 4 (invalid argument type for method main) Compile error at line 2 (must access x by writing Tester.x) 49 TRUE ANSWER : ? YOUR ANSWER : ?
You have the following code in a file called Test.javaclass Base{ public static void main(String[] args){ System.out.println("Hello"); }}public class Test extends Base{}What will happen if you try to compile and run this? Compiles and runs printing It will fail to compile. Compiles and runs with no output. Runtime error TRUE ANSWER : ? YOUR ANSWER : ?
Choose the correct statementpublic class Circle{ private double radius; public Circle(double radius){ radius = radius; }} The program will compile, but we cannot create an object of Circle with a specified radius. The object will always have radius 0. The program has a compilation error because we cannot assign radius to radius. The program has a compilation error because it does not have a main method. The program does not compile because Circle does not have a default constructor. TRUE ANSWER : ? YOUR ANSWER : ?
Which statements are most accurate regarding the following classes?class A{ private int i; protected int j;}class B extends A{ private int k; protected int m;} An object of B contains data fields j, m. An object of B contains data fields j, k, m. An object of B contains data fields i, j, k, m. An object of B contains data fields k, m. TRUE ANSWER : ? YOUR ANSWER : ?
What will be the output for the below code?static public class Test{ public static void main(String[] args){ char c = 'a'; switch(c){ case 65 : System.out.println("one");break; case 'a': System.out.println("two");break; case 3 : System.out.println("three"); } }} None of these two Compile error - char can't be permitted in switch statement. one Compile error - Illegal modifier for the class Test; only public, abstract & final are permitted. TRUE ANSWER : ? YOUR ANSWER : ?
Determine Output:class MyClass{ static final int a = 20; static final void call(){ System.out.println("two"); } static{ System.out.println("one"); }}public class Test{ public static void main(String args[]){ System.out.println(MyClass.a); }} one two 20 one 20 one two one 20 TRUE ANSWER : ? YOUR ANSWER : ?