Java Exam #2 Questions and Answers
Graded A+
An abstract class is not instantiated, but serves as a superclass for other classes.
True OR False - Correct answer-True
A(n) _____ is an object that is generated in memory as the result of an error or an
unexpected event.
a. Exception handler
b. Exception
c. Default exception handler
d. Error message - Correct answer-b. Exception
In a try/catch construct, after the catch statement is executed:
a. the program returns to the statement following the statement in which the
exception occurred
b. the program terminates
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,c. the program resumes at the statement that immediately follows the try/catch
construct
d. the program resumes at the first statement of the try statement - Correct answer-
c. the program resumes at the statement that immediately follows the try/catch
construct
How could the following method header be simplified?
public void copyFile(String str) throws IOException, EOFException
a. public void copyFile(String str) throws IO Exception
b. public void copyFile(String str) throws EOFException
c. public void copyFile(String str) throws EOFException, IOException
d. public void copyFile(String str) throws Exception, IOException, EOFException
- Correct answer-a. public void copyFile(String str) throws IOException
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 - Correct answer-True
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, 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 - Correct answer-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 -
Correct answer-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
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Graded A+
An abstract class is not instantiated, but serves as a superclass for other classes.
True OR False - Correct answer-True
A(n) _____ is an object that is generated in memory as the result of an error or an
unexpected event.
a. Exception handler
b. Exception
c. Default exception handler
d. Error message - Correct answer-b. Exception
In a try/catch construct, after the catch statement is executed:
a. the program returns to the statement following the statement in which the
exception occurred
b. the program terminates
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,c. the program resumes at the statement that immediately follows the try/catch
construct
d. the program resumes at the first statement of the try statement - Correct answer-
c. the program resumes at the statement that immediately follows the try/catch
construct
How could the following method header be simplified?
public void copyFile(String str) throws IOException, EOFException
a. public void copyFile(String str) throws IO Exception
b. public void copyFile(String str) throws EOFException
c. public void copyFile(String str) throws EOFException, IOException
d. public void copyFile(String str) throws Exception, IOException, EOFException
- Correct answer-a. public void copyFile(String str) throws IOException
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 - Correct answer-True
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, 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 - Correct answer-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 -
Correct answer-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
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