Question 1

A method within a class is only accessible by classes that are defined within the same package as the class of the method. Which one of the following is used to enforce such restriction?

A. Declare the method with the keyword public. B. Declare the method with the keyword private. C. Declare the method with the keyword protected. D. Do not declare the method with any accessibility modifiers.

Question 2

What can directly access and change the value of the variable qusNo? <pre class="prettyprint"> package com.mypackage; public class Test{ private int qusNo = 100; } </pre>

A. Only the Test class. B. Any class. C. Any class in com.mypackage package. D. Any class that extends Test.

Question 3

Consider the following two classes declared and defined in two different packages, what can be added in class B to form what considered a correct access to class A from main() method of class B? <pre class="prettyprint"> package subPackage; public class A { } package anotherPackage; // line 1 public class B{ public static void main(String[] args){ // line 2 } } </pre> 1. At line1 add noting; At line2 add: new A();<br />2. At line 1 add: import package.*; at line

A. 1 and 2 B. 2 and 4 C. 3 and 4 D. 1 and 3

Question 4

Choose all the lines which if inserted independently instead of "//insert code here" will allow the following code to compile: <pre class="prettyprint"> public class Test{ public static void main(String args[]){ add(); add(1); add(1, 2); } // insert code here } </pre>

A. void add(Integer... args){} B. static void add(int... args, int y){} C. static void add(int args...){} D. static void add(int...args){}

Question 5

What will be the output for the below code? <pre class="prettyprint"> public class Test{ static{ int a = 5; } public static void main(String[] args){ System.out.println(a); } } </pre>

A. Compile with error B. 5 C. 0 D. Runtime Exception

Question 6

Which statements are most accurate regarding the following classes? <pre class="prettyprint"> class A{ private int i; protected int j; } class B extends A{ private int k; protected int m; } </pre>

A. An object of B contains data fields i, j, k, m. B. An object of B contains data fields j, k, m. C. An object of B contains data fields j, m. D. An object of B contains data fields k, m.

Question 7

What will be the output for the below code? <pre class="prettyprint"> 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"); } } } </pre>

A. one B. two C. Compile error - char can't be permitted in switch statement. D. Compile error - Illegal modifier for the class Test; only public, abstract & final are permitted.

Question 8

Choose the correct statement <pre class="prettyprint"> public class Circle{ private double radius; public Circle(double radius){ radius = radius; } } </pre>

A. The program has a compilation error because it does not have a main method. B. The program will compile, but we cannot create an object of Circle with a specified radius. The object will always have radius 0. C. The program has a compilation error because we cannot assign radius to radius. D. The program does not compile because Circle does not have a default constructor.

Question 9

You have the following code in a file called Test.java <pre class="prettyprint"> class Base{ public static void main(String[] args){ System.out.println("Hello"); } } public class Test extends Base{} </pre> What will happen if you try to compile and run this?

A. It will fail to compile. B. Runtime error C. Compiles and runs with no output. D. Compiles and runs printing

Question 10

Name the keyword that makes a variable belong to a class, rather than being defined for each instance of the class.

A. static B. final C. abstract D. native

Declaration and Access Control in Java