Question 1

Exceptions can be thrown by ________.

Accepted Answer

A)  the Java Virtual Machine. 
B)  code in a try block. 
C)  calls from a try block to other methods. 
D)  All of the above. 
A)  the Java Virtual Machine. 
B)  code in a try block. 
C)  calls from a try block to other methods. 
D)  All of the above. D

Question 2

An uncaught exception ________.

Accepted Answer

A)  is a possible exception that never actually occurs during the execution of the program. 
B)  is an exception that occurs for which the matching catch clause is empty. 
C)  is an exception that occurs for which there are no matching catch clauses. 
D)  is another term for a thrown exception. 
A)  is a possible exception that never actually occurs during the execution of the program. 
B)  is an exception that occurs for which the matching catch clause is empty. 
C)  is an exception that occurs for which there are no matching catch clauses. 
D)  is another term for a thrown exception. C

Question 3

If the catch-or-declare requirement for a checked exception is not satisfied ________.

Accepted Answer

A)  the compiler will issue an error message indicating that the exception must be caught. 
B)  the compiler will issue an error message indicating that the exception must be caught or declared. 
C)  a stack trace will be displayed indicating the exception that has occurred and where it occurred. 
D)  a stack trace will be displayed, along with a message indicating that the exception must be caught. 
A)  the compiler will issue an error message indicating that the exception must be caught. 
B)  the compiler will issue an error message indicating that the exception must be caught or declared. 
C)  a stack trace will be displayed indicating the exception that has occurred and where it occurred. 
D)  a stack trace will be displayed, along with a message indicating that the exception must be caught. B

Question 4

Which of the following statements is false?

Accepted Answer

A)  A finally block is placed after the last catch block. 
B)  A finally block typically releases resources acquired in the corresponding try block. 
C)  The finally block and try block can appear in any order. 
D)  A finally block is optional. 
A)  A finally block is placed after the last catch block. 
B)  A finally block typically releases resources acquired in the corresponding try block. 
C)  The finally block and try block can appear in any order. 
D)  A finally block is optional.

Question 5

The throws clause of a method:

Accepted Answer

A)  specifies the exceptions a method catches. 
B)  specifies the exceptions thrown by the calling method. 
C)  specifies the exceptions a method throws. 
D)  specifies the exceptions a method throws and catches. 
A)  specifies the exceptions a method catches. 
B)  specifies the exceptions thrown by the calling method. 
C)  specifies the exceptions a method throws. 
D)  specifies the exceptions a method throws and catches.

Question 6

Which of the following statements is false?

Accepted Answer

A)  All exceptions must derive from the class Throwable. 
B)  The class Throwable provides the method getStackTrace that outputs the stack trace to the standard error stream. 
C)  The class Throwable provides the method getMessage that returns the descriptive string stored in an exception. 
D)  The string returned from class Throwable's getMessage method contains the name of the exception's class. 
A)  All exceptions must derive from the class Throwable. 
B)  The class Throwable provides the method getStackTrace that outputs the stack trace to the standard error stream. 
C)  The class Throwable provides the method getMessage that returns the descriptive string stored in an exception. 
D)  The string returned from class Throwable's getMessage method contains the name of the exception's class.

Question 7

Which of the following statements is true?

Accepted Answer

A)  Using existing exceptions makes the program less robust. 
B)  Always create your own exception classes. 
C)  An exception class is like any other class; however, a typical new exception class contains no members other than four constructors. 
D)  The new exception class should extend RuntimeException if the program should be required to handle the exception. 
A)  Using existing exceptions makes the program less robust. 
B)  Always create your own exception classes. 
C)  An exception class is like any other class; however, a typical new exception class contains no members other than four constructors. 
D)  The new exception class should extend RuntimeException if the program should be required to handle the exception.

Question 8

Which of the following statements about try blocks is true?

Accepted Answer

A)  The try block must be followed by at least one catch block. 
B)  The try block must be followed by a finally block. 
C)  The try block should contain statements that may process an exception. 
D)  The try block should contain statements that may throw an exception. 
A)  The try block must be followed by at least one catch block. 
B)  The try block must be followed by a finally block. 
C)  The try block should contain statements that may process an exception. 
D)  The try block should contain statements that may throw an exception.

Question 9

Which of the following statements is false?

Accepted Answer

A)  Exception handling enables programmers to write robust and fault-tolerant programs. 
B)  Exception handling can catch but not resolve exceptions. 
C)  Exception handling can resolve exceptions. 
D)  All of the above are true. 
A)  Exception handling enables programmers to write robust and fault-tolerant programs. 
B)  Exception handling can catch but not resolve exceptions. 
C)  Exception handling can resolve exceptions. 
D)  All of the above are true.

Question 10

Chained exceptions are useful for finding out about ________.

Accepted Answer

A)  exceptions thrown using the chained keyword. 
B)  checked exceptions only. 
C)  an original exception that was caught before the current exception was thrown. 
D)  the current exception's chain of superclasses. 
A)  exceptions thrown using the chained keyword. 
B)  checked exceptions only. 
C)  an original exception that was caught before the current exception was thrown. 
D)  the current exception's chain of superclasses.

Question 11

Which of the following exceptions is a checked exception?

Accepted Answer

A)  ArithmeticException. 
B)  IOException. 
C)  RuntimeException. 
D)  InputMismatchException. 
A)  ArithmeticException. 
B)  IOException. 
C)  RuntimeException. 
D)  InputMismatchException.

Question 12

Which of the following is not included in an exception's stack trace?

Accepted Answer

A)  A descriptive message for the exception. 
B)  The method-call stack at the time the exception occurred. 
C)  The name of the exception. 
D)  Instructions on handling the exception. 
A)  A descriptive message for the exception. 
B)  The method-call stack at the time the exception occurred. 
C)  The name of the exception. 
D)  Instructions on handling the exception.

Question 13

After a finally block has finished executing (and there are no exceptions to be handled), ________.

Accepted Answer

A)  control proceeds to the first statement after the finally block. 
B)  control returns to the throw point. 
C)  the application exits. 
D)  control proceeds to the first statement after the last catch block. 
A)  control proceeds to the first statement after the finally block. 
B)  control returns to the throw point. 
C)  the application exits. 
D)  control proceeds to the first statement after the last catch block.

Question 14

Which of the following statements about the try-with-resources statement is false?

Accepted Answer

A)  The try-with-resources statement simplifies writing code in which you obtain a resource, use it in a try block and release the resource in a corresponding finally block. 
B)  You allocate the resource in the parentheses following the try keyword and use the resource in the try block; then the statement implicitly calls the resource's close method at the end of the try block. 
C)  You allocate the resource in the parentheses following the try keyword and use the resource in the try block; then you explicitly call the resource's close method at the end of the try block. 
D)  Each resource must be an object of a class that implements the AutoCloseable interface-such a class has a close method. 
A)  The try-with-resources statement simplifies writing code in which you obtain a resource, use it in a try block and release the resource in a corresponding finally block. 
B)  You allocate the resource in the parentheses following the try keyword and use the resource in the try block; then the statement implicitly calls the resource's close method at the end of the try block. 
C)  You allocate the resource in the parentheses following the try keyword and use the resource in the try block; then you explicitly call the resource's close method at the end of the try block. 
D)  Each resource must be an object of a class that implements the AutoCloseable interface-such a class has a close method.

Question 15

When an unchecked exception occurs in a method but is not caught, ________.

Accepted Answer

A)  the method-call stack is "unwound." 
B)  the method terminates. 
C)  all local variables in that method go out of scope. 
D)  All of the above. 
A)  the method-call stack is "unwound." 
B)  the method terminates. 
C)  all local variables in that method go out of scope. 
D)  All of the above.

Question 16

Which of the following are types of assertions?

Accepted Answer

A)  Preconditions. 
B)  Postconditions. 
C)  Conditions in control statements. 
D)  (a) and (b). 
A)  Preconditions. 
B)  Postconditions. 
C)  Conditions in control statements. 
D)  (a) and (b).

Question 17

In the catch block below, what is e? 
catch (ArithmeticException e) {
System.err.printf(e);
}

Accepted Answer

A)  The type of the exception being caught. 
B)  The name of catch block's exception parameter. 
C)  A finally block. 
D)  An exception handler. 
A)  The type of the exception being caught. 
B)  The name of catch block's exception parameter. 
C)  A finally block. 
D)  An exception handler.

Question 18

Which of the following statements is true?

Accepted Answer

A)  The code in a finally block is executed only if an exception occurs. 
B)  The code in a finally block is executed only if an exception does not occur. 
C)  The code in a finally block is executed only if there are no catch blocks. 
D)  None of the above are true. 
A)  The code in a finally block is executed only if an exception occurs. 
B)  The code in a finally block is executed only if an exception does not occur. 
C)  The code in a finally block is executed only if there are no catch blocks. 
D)  None of the above are true.

Question 19

All exception classes inherit, either directly or indirectly, from ________.

Accepted Answer

A)  class Error. 
B)  class RuntimeException. 
C)  class Throwable. 
D)  None of the above. 
A)  class Error. 
B)  class RuntimeException. 
C)  class Throwable. 
D)  None of the above.

Question 20

Which of the following errors is synchronous?

Accepted Answer

A)  Divide by zero. 
B)  Arithmetic overflow. 
C)  Unsuccessful memory allocation. 
D)  All of the above. 
A)  Divide by zero. 
B)  Arithmetic overflow. 
C)  Unsuccessful memory allocation. 
D)  All of the above.

Exam 11: Exception Handling: a Deeper Look

Exceptions can be thrown by ________.

An uncaught exception ________.

If the catch-or-declare requirement for a checked exception is not satisfied ________.

Which of the following statements is false?

The throws clause of a method:

Which of the following statements is false?

Which of the following statements is true?

Which of the following statements about try blocks is true?

Which of the following statements is false?

Chained exceptions are useful for finding out about ________.

Which of the following exceptions is a checked exception?

Which of the following is not included in an exception's stack trace?

After a finally block has finished executing (and there are no exceptions to be handled), ________.

Which of the following statements about the try-with-resources statement is false?

When an unchecked exception occurs in a method but is not caught, ________.

Which of the following are types of assertions?

In the catch block below, what is e? catch (ArithmeticException e) { System.err.printf(e); }

Which of the following statements is true?

All exception classes inherit, either directly or indirectly, from ________.

Which of the following errors is synchronous?

Introduction to Computers, the Internet and Java

Introduction to Java Applications; Inputoutput and Operators

Introduction to Classes, Objects, Methods and Strings

Control Statements: Assignment, and Operators

Control Statements: Logical Operators

Methods: a Deeper Look

Arrays and Arraylists

Classes and Objects: a Deeper Look

Object-Oriented Programming: Inheritance

Object-Oriented Programming: Polymorphism and Interfaces

Javafx Graphical User Interfaces

Javafx Gui

Strings, Characters and Regular Expressions

Files, Inputoutput Streams, Nio and Xml Serialization

Generic Collections

Lambdas and Streams

Recursion

Searching, Sorting and Big O

Generic Classes and Methods: a Deeper Look

Custom Generic Data Structures

Concurrency

Accessing Databases With Jdbc

Swing Gui Components

Graphics and Java 2d

Networking

Java Persistence Api Jpa

Javaserver Faces Web Apps

Javaserver Faces Web Apps

Swing Gui Components

Filters