Introduction To Programming - Lesson Exception Handling

Why Use Error Handling? Error handling ensures that your program can handle unexpected situations without crashing, helping improve user experience and program stability.

• To improve user experience and program stability

• To make the program run slower

• To increase the complexity of the code

• To reduce the need for testing

Answer explanation

Error handling is crucial as it allows programs to manage unexpected situations gracefully, thus enhancing user experience and ensuring program stability. The correct choice highlights this essential benefit.

Error Handling is:

• a process of responding to the occurrence of exceptions during computation

• a method to increase the speed of a program

• a technique to optimize memory usage

• a way to enhance the user interface

Answer explanation

Error handling is specifically about managing exceptions that occur during program execution, making the correct choice 'a process of responding to the occurrence of exceptions during computation'.

What are Exceptions?

• A type of error handling mechanism

• A type of loop

• A type of variable

• A type of function

Answer explanation

Exceptions are a type of error handling mechanism used in programming to manage and respond to runtime errors, allowing for graceful recovery and control flow, making 'A type of error handling mechanism' the correct choice.

Throwing Exceptions: When a program encounters an error condition, it "throws" an exception. This is like the program signaling that something went wrong and needs to be addressed.

• True

• False

Answer explanation

True. When a program encounters an error, it throws an exception to signal that something went wrong, indicating the need for error handling.

Catching Exceptions: When an exception is thrown, it can be "caught" by the program. This prevents the program from crashing and allows you to handle the error in a controlled way. In Python, this is done using the try and except blocks.

• True

• False

Answer explanation

True. In Python, exceptions can be caught using try and except blocks, allowing for controlled error handling and preventing program crashes.

Finally Block: The finally block is a piece of code that runs after the try-except block, no matter whether an exception was thrown or caught. It is typically used for cleanup operations (like closing files or freeing resources).

• True

• False

Answer explanation

The statement is True. The finally block executes after the try-except block, regardless of whether an exception occurred. It is primarily used for cleanup tasks, ensuring resources are released properly.

What is the purpose of the Try Block in Python?

• To handle exceptions

• To write code that might raise an exception

• To execute cleanup code

Answer explanation

The Try Block in Python is used to write code that might raise an exception. It allows developers to attempt executing code while providing a mechanism to handle potential errors gracefully.

What does the Except Block do in Python?

• It runs code that should execute no matter what

• It is used to catch and handle specific exceptions

• It writes code that might raise an exception

Answer explanation

The Except Block in Python is specifically designed to catch and handle specific exceptions that may occur during the execution of code, allowing for graceful error management.

The purpose of the Finally Block in Python is to:

• Execute code regardless of whether an exception is raised or not.

• Handle exceptions that are not caught by except blocks.

• Terminate the program immediately when an exception occurs.

• Log error messages to a file.

Answer explanation

The Finally Block in Python is designed to execute code regardless of whether an exception occurs or not. This ensures that essential cleanup actions, like closing files or releasing resources, are performed.

The suspicious code is put inside the

• Try Block

• Finally Block

• Else Block

• Except Block

Answer explanation

The suspicious code is typically placed inside a Try Block to handle exceptions that may arise during execution. This allows for error management while executing potentially problematic code.