Question 1

The purpose of stack unwinding is to:

Accepted Answer

A)  Attempt to catch exceptions that are not caught in their scope. 
B)  Improve catch blocks by allowing them to handle multiple exceptions. 
C)  Return control to the function that created the exception. 
D)  Aid the terminate command in shutting down the program. 
A)  Attempt to catch exceptions that are not caught in their scope. 
B)  Improve catch blocks by allowing them to handle multiple exceptions. 
C)  Return control to the function that created the exception. 
D)  Aid the terminate command in shutting down the program. A

Question 2

The correct order in which an exception is detected and handled is:

Accepted Answer

A)  try, catch, throw 
B)  throw, catch, try 
C)  catch, throw, try 
D)  try, throw, catch 
A)  try, catch, throw 
B)  throw, catch, try 
C)  catch, throw, try 
D)  try, throw, catch D

Question 3

Which of the following statements is false?

Accepted Answer

A)  As of C++11, if a function does not throw any exceptions and does not call any functions that throw exceptions, you can explicitly state that a function does not throw exceptions by placing noexcept to the right of the function's parameter list in both the prototype and the definition. 
B)  Labeling a function noexcept indicates to client-code programmers that there's no need to call the function in a try block. 
C)  For a const member function, you must place noexcept after const. 
D)  If a function that's declared noexcept calls another function that throws an exception or executes a throw statement, the program returns to its caller. 
A)  As of C++11, if a function does not throw any exceptions and does not call any functions that throw exceptions, you can explicitly state that a function does not throw exceptions by placing noexcept to the right of the function's parameter list in both the prototype and the definition. 
B)  Labeling a function noexcept indicates to client-code programmers that there's no need to call the function in a try block. 
C)  For a const member function, you must place noexcept after const. 
D)  If a function that's declared noexcept calls another function that throws an exception or executes a throw statement, the program returns to its caller. D

Question 4

The try block cannot:

Accepted Answer

A)  Enclose the code that may throw the exception. 
B)  Enclose its own catch blocks. 
C)  Test enclosing try blocks for additional catch statements if this try block's catch statements can't match the exception being thrown. 
D)  Have exceptions explicitly or implicitly thrown in the try block itself. 
A)  Enclose the code that may throw the exception. 
B)  Enclose its own catch blocks. 
C)  Test enclosing try blocks for additional catch statements if this try block's catch statements can't match the exception being thrown. 
D)  Have exceptions explicitly or implicitly thrown in the try block itself.

Question 5

To rethrow an exception, the exception handler must:

Accepted Answer

A)  Use the throw; statement. 
B)  Use the throw command with the same parameters as the original exception. 
C)  Return a reference to whatever caused the original exception. 
D)  Not have attempted to process that exception at all. 
A)  Use the throw; statement. 
B)  Use the throw command with the same parameters as the original exception. 
C)  Return a reference to whatever caused the original exception. 
D)  Not have attempted to process that exception at all.

Question 6

Catch blocks are not required to contain:

Accepted Answer

A)  Braces { }. 
B)  Parentheses ( ). 
C)  Some form of parameter type indication. 
D)  A parameter name. 
A)  Braces { }. 
B)  Parentheses ( ). 
C)  Some form of parameter type indication. 
D)  A parameter name.

Question 7

To initialize a unique_ptr, you can use C++14's ________ function template, which allocates dynamic memory with operator new, then returns a unique_ptr to that memory. Prior to C++14, you'd pass the result of a new expression directly to unique_ptr's constructor.

Accepted Answer

A)  create_unique 
B)  make_unique 
C)  get_unique 
D)  form_unique 
A)  create_unique 
B)  make_unique 
C)  get_unique 
D)  form_unique

Question 8

Select the false statement. The new operator:

Accepted Answer

A)  Can attempt to allocate as much memory as the programmer requests. 
B)  Returns a pointer to a location in memory. 
C)  Can indicate failure differently on different compilers. 
D)  Throws a bad_alloc exception regardless of what function is registered with set_new_handler. 
A)  Can attempt to allocate as much memory as the programmer requests. 
B)  Returns a pointer to a location in memory. 
C)  Can indicate failure differently on different compilers. 
D)  Throws a bad_alloc exception regardless of what function is registered with set_new_handler.

Question 9

Which statement about class unique_ptr (of the new C++ standard) and dynamic memory allocation is false?

Accepted Answer

A)  An object of class unique_ptr maintains a pointer to dynamically allocated memory. 
B)  When a unique_ptr object destructor is called (for example, when a unique_ptr object goes out of scope), it performs a destroy operation on its pointer data member. 
C)  Class template unique_ptr provides overloaded operators * and -> so that a unique_ptr object can be used just as a regular pointer variable is. 
D)  Class unique_ptr is part of the new C++ standard and it replaces the deprecated auto_ptr class. 
A)  An object of class unique_ptr maintains a pointer to dynamically allocated memory. 
B)  When a unique_ptr object destructor is called (for example, when a unique_ptr object goes out of scope), it performs a destroy operation on its pointer data member. 
C)  Class template unique_ptr provides overloaded operators * and -> so that a unique_ptr object can be used just as a regular pointer variable is. 
D)  Class unique_ptr is part of the new C++ standard and it replaces the deprecated auto_ptr class.

Question 10

An advantage of using inheritance with exceptions is:

Accepted Answer

A)  The ability to catch related errors easily. 
B)  Allowing catch statements to be imported into classes. 
C)  The ability to explicitly test for derived class objects individually. 
D)  The simplification of destructor calls for objects. 
A)  The ability to catch related errors easily. 
B)  Allowing catch statements to be imported into classes. 
C)  The ability to explicitly test for derived class objects individually. 
D)  The simplification of destructor calls for objects.

Question 11

An exception:

Accepted Answer

A)  Terminates program execution. 
B)  Terminates the block where the exception occurred. 
C)  Will terminate the block where the exception occurred unless a catch command stops it. 
D)  Will not terminate a block unless explicitly instructed to do so. 
A)  Terminates program execution. 
B)  Terminates the block where the exception occurred. 
C)  Will terminate the block where the exception occurred unless a catch command stops it. 
D)  Will not terminate a block unless explicitly instructed to do so.

Question 12

Exception handling may allow a program to:

Accepted Answer

A)  Terminate in a controlled manner. 
B)  Be more robust and fault-tolerant. 
C)  Continue executing as if no problem was encountered. 
D)  All of the above. 
A)  Terminate in a controlled manner. 
B)  Be more robust and fault-tolerant. 
C)  Continue executing as if no problem was encountered. 
D)  All of the above.

Question 13

Exception handling should not be used:

Accepted Answer

A)  As an alternative for program control. 
B)  To make error handling uniform on large projects. 
C)  To deal with errors that do not arise very often. 
D)  To deal with errors for components that will be widely used in other applications, such as classes and libraries. 
A)  As an alternative for program control. 
B)  To make error handling uniform on large projects. 
C)  To deal with errors that do not arise very often. 
D)  To deal with errors for components that will be widely used in other applications, such as classes and libraries.

Question 14

Once an exception is thrown, when can control return to the throw point?

Accepted Answer

A)  Never. 
B)  Only after the exception is caught. 
C)  Once the stack unwinding process is completed. 
D)  Immediately after the exception is thrown. 
A)  Never. 
B)  Only after the exception is caught. 
C)  Once the stack unwinding process is completed. 
D)  Immediately after the exception is thrown.

Question 15

Which class indicates that an error occurred in which an arithmetic result was larger than the largest number that can be stored in the computer?

Accepted Answer

A)  invalid_argument. 
B)  bad_exception. 
C)  out_of_range. 
D)  overflow_error. 
A)  invalid_argument. 
B)  bad_exception. 
C)  out_of_range. 
D)  overflow_error.

Question 16

Select the false statement. Depending on the compiler:

Accepted Answer

A) A failed new operation can return a 0. B) A failed new operation can throw a bad_alloc exception. C) A failed new operation can throw an exception if the header file has been included. D) A failed new operation can automatically be caught at compile time. A) A failed new operation can return a 0. B) A failed new operation can throw a bad_alloc exception. C) A failed new operation can throw an exception if the header file has been included. D) A failed new operation can automatically be caught at compile time.

Question 17

Select the false statement. If an exception is thrown from a constructor:

Accepted Answer

A)  The object being constructed will not be constructed. 
B)  For an array, destructors for all array elements are called, even if those array elements have not yet been constructed. 
C)  The exception can contain the error information that the constructor would not be able to return in the normal manner. 
D)  For an object with member objects, and whose outer object has not been constructed, the destructor is called for the member objects. 
A)  The object being constructed will not be constructed. 
B)  For an array, destructors for all array elements are called, even if those array elements have not yet been constructed. 
C)  The exception can contain the error information that the constructor would not be able to return in the normal manner. 
D)  For an object with member objects, and whose outer object has not been constructed, the destructor is called for the member objects.

Question 18

Select the false statement. A rethrown exception:

Accepted Answer

A)  Is detected by the next enclosing try block. 
B)  Is the immediate result of a throw command. 
C)  Can be processed by exception handlers following the enclosing try block. 
D)  Must have been fully processed at the time it was rethrown. 
A)  Is detected by the next enclosing try block. 
B)  Is the immediate result of a throw command. 
C)  Can be processed by exception handlers following the enclosing try block. 
D)  Must have been fully processed at the time it was rethrown.

Question 19

Select the false statement regarding exceptions.

Accepted Answer

A) The C++ standard has a hierarchy of exception classes. B) All exception classes are accessible via . C) Several classes derive from class exception. D) The what function can be overridden in each class derived from exception. A) The C++ standard has a hierarchy of exception classes. B) All exception classes are accessible via . C) Several classes derive from class exception. D) The what function can be overridden in each class derived from exception.

Question 20

If dynamic memory has been allocated for an object and an exception occurs, then:

Accepted Answer

A)  The catch block will not work properly. 
B)  A memory leak could result. 
C)  The object's constructor will cause another exception. 
D)  Multiple pointers to memory could be created. 
A)  The catch block will not work properly. 
B)  A memory leak could result. 
C)  The object's constructor will cause another exception. 
D)  Multiple pointers to memory could be created.

Exam 17: Exception Handling: a Deeper Look

The purpose of stack unwinding is to:

The correct order in which an exception is detected and handled is:

Which of the following statements is false?

The try block cannot:

To rethrow an exception, the exception handler must:

Catch blocks are not required to contain:

To initialize a unique_ptr, you can use C++14's ________ function template, which allocates dynamic memory with operator new, then returns a unique_ptr to that memory. Prior to C++14, you'd pass the result of a new expression directly to unique_ptr's constructor.

Select the false statement. The new operator:

Which statement about class unique_ptr (of the new C++ standard) and dynamic memory allocation is false?

An advantage of using inheritance with exceptions is:

An exception:

Exception handling may allow a program to:

Exception handling should not be used:

Once an exception is thrown, when can control return to the throw point?

Which class indicates that an error occurred in which an arithmetic result was larger than the largest number that can be stored in the computer?

Select the false statement. Depending on the compiler:

Select the false statement. If an exception is thrown from a constructor:

Select the false statement. A rethrown exception:

Select the false statement regarding exceptions.

If dynamic memory has been allocated for an object and an exception occurs, then:

Introduction to Computers and C++

Introduction to C Programming; Inputoutput and Operators

Introduction to Classes, Objects and Strings

Control Statements, Assignment, and Operators

Control Statements, Logical Operators

Functions and an Introduction to Recursion

Class Templates Array and Vector; Catching Exceptions

Pointers and Pointer-Based Strings

Classes: a Deeper Look; Throwing Exceptions

Operator Overloading; String and Array Objects

Object-Oriented Programming: Inheritance

Object-Oriented Programming: Polymorphism

Stream Inputoutput: a Deeper Look

File Processing

Standard Library Containers and Iterators

Standard Library Algorithms

Introduction to Custom Templates

Custom Templatized Data Structures

Searching and Sorting

Class String and String Stream Processing

Bits, Characters, C Strings and Structs

Other Topics

C++11 Additional Features

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