Java Exam #2 UPDATED ACTUAL Exam Questions and CORRECT Answers

Java Exam #2 UPDATED ACTUAL Exam Questions and
CORRECT Answers


When the code in a try block may throw more than one type of exception, you need to write a
catch clause for each type of exception that could potentially be thrown.

True OR False - True



The illegalArgumentException class inherits from the RuntimeException class, and is therefore:
a. A checked exception class
b. An unchecked exception class

c. Never used directly

d. None of the above - b. An unchecked exception class



When you use a checked exception class, you must:

a. have a throws clause in the method heading
b. override the default error method

c. use each class only once in a method

d. ensure that the error will occur at least once each time the program is executed - a. have a
throws clause in the method heading


A class that has at least one abstract method is called an:

a. concrete class

b. encapsulated class

c. abstract class

d. private class - c. abstract class


Java allows an instance of an abstract class to be instantiated.

, True OR False - False.



An abstract class is a class that has some methods without complete definitions.

True OR False - True.


The FileNotFoundException is a descendant of the class IOException.

True OR False - True.



Look at the following code. (NOTE: The numbers on the left are for line identification.)



1 public interface Interface1

2{
3 int FIELDA = 55;

4 public int methodA(double){}

5}



Which line in the interface has an error?

a. 1

b. 2
c. 3

d. 4 - d. 4



Which of the following statements correctly specifies three interfaces?

a. public class ClassA implements Interface1, Interface2, Interface3

b. public class ClassA implements [Interface1, Interface2, Interface3]

c. public class ClassA implements (Interface1, Interface2, Interface3)