Lesson 13: Exceptions

Question 1

What is error - checking code?

Answer 1

Code that a programmer introduces to detect and handle errors that occur while the program executes

Question 2

What is the purpose of exception handling constructs?

Answer 2

They handle exceptional circumstances, or errors, during execution

Question 3

What kind of code is placed in a “try” block?

Answer 3

Code that potentially may produce an exception.

Question 4

When is an “except” block” used?

Answer 4

If the code in the try block causes an exception

Question 5

What causes an unhandled exception to occur?

Answer 5

No exception handler existing for an error type

Question 6

What does the interpreter do when it encounters an unhandled exception?

Answer 6

Print the exception that occurred and halt

Question 7

When is a “raise” statement executed?

Answer 7

When code detects an error

Question 8

What happens when a “raise” statement executes?

Answer 8

1. Immediate exit from the try block and the execution of an exception handler
2. The exception handler prints the argument passed by the raise statement that brought execution

Question 9

What does the “as” keyword do?

Answer 9

Binds a name to the exception being handled

Question 10

What does the “finally” clause in a try statement do?

Answer 10

Allows a programmer to specify clean - up actions that are always executed-