Why error handling uses rescue in Ruby - Quick Recap

Recall & Review

beginner

What does the rescue keyword do in Ruby?

rescue catches errors (exceptions) that happen in a block of code and lets the program handle them without crashing.

beginner

Why is error handling important in programming?

It helps the program keep running smoothly even when unexpected problems happen, like wrong input or missing files.

beginner

How does rescue improve user experience?

By catching errors, rescue allows the program to show friendly messages or fix issues instead of crashing suddenly.

beginner

What happens if you don't use rescue and an error occurs?

The program stops immediately and shows an error message, which can confuse users or cause data loss.

intermediate

Can rescue handle different types of errors?

Yes, you can specify which errors to catch or use a general rescue to catch all exceptions.

What is the main purpose of rescue in Ruby?

A To catch and handle errors

B To create new variables

C To loop through arrays

D To define methods

rescue is used to catch errors and prevent the program from crashing.

What happens if an error is not rescued in Ruby?

A The program continues normally

B The program restarts automatically

C The error is ignored silently

D The program crashes and shows an error message

Without rescue, Ruby stops the program and shows the error.

Which keyword is used to handle exceptions in Ruby?

A rescue

B try

C catch

D except

rescue is Ruby's keyword for error handling.

Can rescue handle multiple types of errors?

A No, only one error type at a time

B Yes, by specifying error classes

C Only syntax errors

D Only runtime errors

You can specify which error classes rescue should catch.

Why should you use rescue in your Ruby programs?

A To write shorter code

B To make programs run faster

C To handle errors gracefully and keep programs running

D To avoid writing comments

rescue helps programs handle errors without crashing.

Explain why Ruby uses rescue for error handling and how it helps programs.

Think about what happens when something goes wrong in a program.

Describe what would happen if you did not use rescue in a Ruby program when an error occurs.

Imagine a program breaking suddenly without warning.