Deck 16: Exception Handling

Question 1

If a function throws an exception, it must be caught inside that function.

Answer 1

False

Question 2

The catch block
catch ...)
is known as the ______________.

Answer 2

default catch block

Question 3

Functions may potentially throw at most one exception.

Answer 3

False

Question 4

The catch block is a function.

Question 5

The catch block is the group of statements that handle an exception.

Question 6

Exception handling is used to _____________.

Question 7

The braces are not necessary on a try block.

Question 8

C++ signals an error or unusual situation by __________.

Question 9

A throw statement passes which type of value to the catch block?

Question 10

The throw statement passes a value to the catch block.

Question 11

Functions that might throw an exception must have a throw list.

Question 12

If a function does not have an exception specification, then the function can thaw _______ exceptions.

Question 13

The following function does not throw any unhandled exceptions
void f1 ) throw );

Question 14

The catch block is also known as the ___________.

Question 15

The following catch block catches all __________ exceptions.
catch string e)
{
}

Question 16

If no exception is thrown, then the _________ is ignored.

Question 17

If a function throws an exception and does not catch it, then the function definition and declaration should have _______.

Question 18

In a try block, the throw statement is always executed.

Question 19

It is legal to have a catch block with no parameter.

Question 20

If a throw list has multiple exceptions listed, they are separated by _________.

Question 21

The following class definition
Class MyError
{};

A) has no member functions or member data
B) has only a default constructor
C) is illegal
D) A and B

Question 22

When a throw statement is executed,

A) execution of the try block stops
B) execution of the throw block stops
C) the program always exits
D) execution of the catch block stops

Question 23

The parameter in the catch statement

A) identifies what type of exceptions are caught
B) identifies the different number of exceptions that can be caught
C) makes the catch block a function
D) must always be an e

Question 24

If the following function throws an unhandled exception, what happens?
void f1);

Question 25

Given the following function definition, what happens if the function throws the exception?
Void f1 ) throw double)
{
If //some code here)
Throw 12;
}

A) the 12 will be converted to 12.0
B) the function will throw an integer exception which is passed to the calling code.
C) the function will cause the program to exit
D) this code has a syntax error

Question 26

If the following function will throw a string exception, then
Void myFunction );

A) the function definition and declaration should have a throw list
B) the function definition, but not the declaration should have a throw list
C) the function should have an empty throw list.
D) all of the above

Question 27

When an unusual situation or error occurs, then the ________ statement is executed.

A) try
B) throw
C) error
D) exiting

Question 28

A catch block that expects an integer argument will catch

A) all exceptions
B) all integer exceptions
C) any exception value that can be coerced into an integer
D) none of the above

Question 29

The block of code that checks if an unusual situation or error occurs is called

A) the catch block
B) the try block
C) a function
D) an error block

Question 30

Can the following function throw any unhandled exceptions?
void f1 );

Question 31

If a function throws an exception,

A) it must be caught in that function.
B) it may be caught in that function
C) it causes a syntax error
D) it can only be a non-numeric exception.

Question 32

The block of code that handles an exception is called

A) the catch block
B) the try block
C) a function
D) an error block

Question 33

If you have a function that might throw an exception and some programs that use that function might want to handle that exception differently, you should

A) not catch the exception in the function
B) throw an integer exception
C) never throw an exception in this function
D) none of the above

Question 34

The following catch statement
Catch...)

A) is illegal
B) catches only numeric exceptions
C) catches all exceptions
D) should be the first catch block if multiple catch statements are present

Question 35

If some part of your program or any library functions that are called) throw an exception, then if this exception is not handled in your code, your program will _____.

Question 36

If a function throw list specifies a base class type, then the function may also throw an exception of the ________ class type.

Question 37

Which of the following function declaration correctly specifies that two types of exceptions are thrown?

A) void f1exception a, exception b);
B) void f1 ) exception a;b);
C) void f1 ) throw a, throw b;
D) void f1 ) thaw a,b);

Question 38

The throw statement is enclosed in

A) a catch block
B) a throw block
C) a try block
D) quotes

Question 39

Which of the following is not a valid reason for using exception handling?

A) throw and catch can be used like gotos
B) the procedure for handling an error depends on the situation
C) need to handle built in exceptions
D) none of the above

Question 40

If the following function throws an unhandled exception, what happens?
void f1) throws );

Question 41

Which of the following would be a good reason for using inherited exception classes?

A) a base class exception can be passed to an exception parameter of the derived class
B) a derived class exception can be passed to an exception parameter of the base class
C) a base class exception parameter can be passed any type of exception
D) all of the above

Question 42

If a function will possibly throw an unhandled exception, the try block should

A) be in the function definition
B) encompass the function call
C) be in the catch block
D) not be used

Question 43

A class that is used for exceptions is declared

A) differently from other classes
B) specialized only for exceptions
C) may not have objects declared of that class
D) all of the above
E) none of the above

Question 44

If class A is derived from class B, and a virtual function in class B throws an exception, then the overridden version of that function in class A must

A) not throw any exceptions
B) have an exception specification that is a subset of the exception specification of the base class B
C) not throw any exceptions that the function in class B might throw
D) all of the above

Question 45

You should use exception handling

A) in all your programs
B) only when you can not handle the exception with simpler control structures
C) only when you use classes
D) in every function

Question 46

Which of the following code fragments are illegal?

A) try {
Try
{
//other code here
}
Catchint e)
{
//code here
}
}
Catchfloat e)
{
//code here
}
B) try {
//code here
}
Catchint e)
{
//code here
Try
{
//code here
}
Catchstring e)
{
}
}
C) All of the above
D) None of the above

Question 47

Which type of exception is thrown if a call to the new operator fails?

A) ArithmeticError
B) DivideByZero
C) bad_alloc
D) MemoryError