Learn Go in 3 Hours - Errors

The video tutorial covers error handling in Go, explaining how it differs from languages that use exceptions. Go uses return values to indicate errors, allowing multiple return values from functions. The tutorial demonstrates error handling patterns, creating custom error types, and understanding nil in interfaces. It concludes with a brief introduction to Go's concurrency features.

How does Go signal an error in a function or method?

• By logging the error

• By returning an error value

• By returning a boolean value

• By throwing an exception

What is the purpose of the error interface in Go?

• To define a method for handling errors

• To provide a standard way to return error messages

• To automatically log errors

• To allow multiple error types

In the provided example, what happens if the divisor is zero?

• A custom error message is returned

• An exception is thrown

• The program continues without error

• The program logs a warning

What is a common pattern for error handling in Go functions?

• Returning zero values and an error when a condition causes an error

• Ignoring errors and returning default values

• Logging errors and continuing execution

• Throwing exceptions when an error occurs

What is a key benefit of using custom error types in Go?

• They provide more detailed error information

• They make the code run faster

• They automatically fix errors

• They reduce the need for error handling

What is a potential issue when returning a custom error type in Go?

• The error type might not be recognized

• The error might not appear as nil even if no error occurred

• The error message might be too detailed

• The error might cause the program to crash

Why is understanding nil in Go interfaces important?

• Because nil values can cause unexpected behavior

• Because nil values are automatically converted

• Because nil values are not used in Go

• Because nil values are always ignored