Rust Programming Master Class from Beginner to Expert - Result Enum

This tutorial covers the Result ENUM in Rust, a crucial component for handling success and error states in programs. It begins with an introduction to the Result ENUM, explaining its structure and usage. The tutorial then demonstrates a division function using the Result ENUM to handle division by zero errors. It also explores using the match construct as an alternative to if-else statements. Finally, the tutorial provides an example using vectors and the Option ENUM, illustrating how to handle potential errors when accessing vector elements.

What is the primary purpose of the Result ENUM in Rust?

• To iterate over collections

• To define constant values

• To manage success and error outcomes

• To handle optional values

What does the Result ENUM represent in Rust?

• A type that can be either success or error

• A loop construct

• A collection of items

• A conditional statement

Which of the following is a variant of the Result ENUM?

• Err

• Some

• Maybe

• None

What is the purpose of using generics in the Result ENUM?

• To restrict the types to integers

• To specify the type of error only

• To specify the type of success only

• To allow any type for success and error

In the division function example, what does the Result ENUM return when the divisor is zero?

• Some variant with zero

• None variant

• Err variant with a string message

• OK variant with zero

In the division function, what type is used for the successful result?

• Bool

• F64

• I32

• String

What is the alternative to using if statements for handling Result ENUM in Rust?

• While construct

• Match construct

• Loop construct

• For construct

How does the match construct improve handling of Result ENUM?

• By reducing code readability

• By making the code less efficient

• By providing a more structured way to handle variants

• By increasing the number of lines of code

When using the get function on a vector, what does it return if the index is valid?

• Err variant

• OK variant

• None variant

• Some variant

What happens when the get function is used with an invalid index?

• It throws an exception

• It returns a Some variant

• It returns an OK variant

• It returns a None variant