Deck 16: Exceptions and Templates

Question 1

If an exception is not caught, the program will abort execution.

Answer 1

True

Question 2

A(n) __________ is used in a function template to specify a generic data type.

A) dummy variable
B) exception
C) catch block
D) type parameter
E) None of these

Answer 2

D

Question 3

The try/catch/throw construct is able to handle only one type of exception in a try block.

Answer 3

False

Question 4

In a function template, the programmer substitutes __________ for __________.

A) parameters, data types
B) parameters, arguments
C) arguments, parameters
D) data types, parentheses
E) None of these

Question 5

An exception thrown from outside a try block will

A) be caught outside the catch block
B) be caught inside the catch block
C) remain inside the throw block
D) cause the program to abort execution
E) None of these

Question 6

A generic function that can work with any data type is called an exception template.

Question 7

Which of the following is used to signal errors or unexpected results that happen as a program runs?

A) virtual functions
B) destructors
C) exceptions
D) templates
E) None of these

Question 8

The try block of a try/catch construct is used to display the definition of an exception parameter.

Question 9

If an exception is not caught, it is stored for later use.

Question 10

When an error occurs, an exception is

A) created
B) thrown
C) passed
D) ignored
E) None of these

Question 11

Function templates allow you to write a single function definition that works with many data types.

Question 12

There is no difference between declaring an object of an ordinary class and an object of a template class.

Question 13

Using a function template requires less code than overloading a function.

Question 14

If an exception is thrown by a member function of a class object, the class __________ is called.

A) constructor
B) destructor
C) catcher
D) handler
E) None of these

Question 15

Given the following code, what will happen if the value of denom is 0?
Double divide(int numer, int denom)
{
If (denom == 0)
Throw "ERROR:
Cannot divide by zero.\n";
Else
Return static_cast(numer)/denom;
}

A) Nothing will happen because there is no catch block.
B) The program will display ERROR: Cannot divide by zero.and then move to the statement following the if/else block.
C) The program will display ERROR: Cannot divide by zero.and then halt.
D) There is no throw point because there is no try block.
E) None of these

Question 16

The line containing a throw statement is known as the throw point.

Question 17

In the following code, which statement is the throw point?
Double divide(int numer, int denom)
{
If (denom == 0)
Throw "ERROR:
Cannot divide by zero.\n";
Else
Return static_cast(numer)/denom;
}

A) if (denom == 0)
B) throw "ERROR: Cannot divide by zero.\n";
C) return static_cast(numer)/denom;
D) There is no throw point because there is no try block.
E) None of these

Question 18

Exceptions are used to signal errors or unexpected results that occur when a program is running.

Question 19

The __________ starts with the key word try and is followed by a block of code that executes any statement that might cause an exception to be thrown..

A) try block
B) try/catch class
C) try function
D) catch function
E) None of these

Question 20

A program may not contain both a "regular" version of a function and a template version of the function.

Question 21

If you want to catch a bad_alloc exception in a program, you should include

A) #include
B) #include
C) #include
D) None of these

Question 22

All type parameters defined in a function template must appear at least once in the

A) function parameter list
B) preprocessor directives
C) function call
D) type.h file
E) None of these

Question 23

Catch blocks serve as

A) exception handlers
B) receivers
C) temporary variables
D) permanent storage for trapped errors
E) None of these

Question 24

What does the T represent in the following statement?
Template < class T >

A) the name of the function template
B) T stands for Template
C) a generic data type that is used in a function template
D) the int data type
E) None of these

Question 25

When the __________ operator fails to allocate memory, C++ throws a bad_alloc exception.

A) new
B) alloc
C) catch
D) None of these

Question 26

The beginning of a function template is marked by a

A) return type
B) parameter list
C) template prefix
D) semicolon
E) None of these

Question 27

How much memory is reserved for a function template?

A) four bytes
B) It depends on the size of the template.
C) two bytes
D) no memory
E) None of these

Question 28

The try block is immediately followed by one or more

A) errors
B) error messages
C) catch blocks
D) throw blocks
E) None of these

Question 29

What does the word class indicate in the following statement?
Template < class T >

A) class is a key word that is used to precede the type parameter.
B) It indicates that a class is being derived from an existing class named T.
C) It indicates that a class named T is being derived from a class named template.
D) A class named T will automatically be created by the compiler.
E) None of these

Question 30

A generic function that can work with any data type is a

A) function argument
B) function parameter
C) function template
D) member function
E) None of these

Question 31

A(n) __________ is a value or an object that signals an error.

A) destructor
B) template
C) throw
D) exception
E) None of these

Question 32

An actual instance of the function is created in memory when the compiler encounters

A) the template prefix
B) a call to the template function
C) a try block
D) a catch block
E) None of these

Question 33

Class templates allow you to create one general version of a class without having to

A) write any code
B) use member functions
C) use private members
D) duplicate code to handle multiple data types
E) None of these

Question 34

A function template's prefix contains __________ enclosed in angle brackets.

A) one or more generic data types
B) the function definition
C) constant values
D) the function's return type
E) None of these

Question 35

A function template prefix is placed before the function header while a class template prefix is placed

A) following the public: access specification
B) following the private: access specification
C) before the class declaration
D) before the class constructor function header
E) None of these

Question 36

To handle an exception that has been thrown, a program must have a(n)

A) throw function
B) try/catch construct
C) fatal error
D) unrecoverable error
E) None of these