Rust Programming Master Class from Beginner to Expert - Rust Modules (Part 2)

This tutorial covers the Rust module system, explaining packages, crates, and how to create and use modules. It discusses the visibility of functions and modules, the use of the pub keyword, and how to access functions within modules. The tutorial also explores the privacy of structures and enums, highlighting how to make fields public. It concludes with a brief overview of using enums and their variants in Rust.

What is the main difference between binary and library crates in Rust?

• Both binary and library crates are for organizing code.

• Both binary and library crates are for execution.

• Library crates are for organizing code, while binary crates are for execution.

• Binary crates are for organizing code, while library crates are for execution.

How do you create a module in Rust?

• By using the 'mod' keyword followed by square brackets.

• By using the 'module' keyword followed by curly brackets.

• By using the 'module' keyword followed by parentheses.

• By using the 'mod' keyword followed by curly brackets.

What keyword is used to make a module or function public in Rust?

• open

• public

• pub

• visible

In Rust, what is the default visibility of functions within a module?

• Protected

• Private

• Public

• Internal

What is the purpose of the 'use' statement in Rust?

• To shorten the path to a function or module.

• To make a function public.

• To declare a new module.

• To create a new crate.

How are fields within a struct treated in terms of visibility by default in Rust?

• Fields are internal by default.

• Fields are protected by default.

• Fields are private by default.

• Fields are public by default.

What is the effect of making a struct public in Rust?

• The struct and all its fields become private.

• Only the struct becomes public, not its fields.

• All its fields become public automatically.

• The struct becomes private, but its fields become public.

How can you access a function from a child module in a parent module in Rust?

• By using the 'use' keyword.

• By making the function public with 'pub'.

• By using the 'import' keyword.

• By declaring the function in the parent module.

What happens when you make an enum public in Rust?

• The enum and all its variants become public.

• The enum becomes private, but its variants become public.

• Nothing changes; enums are always public.

• Only the enum becomes public, not its variants.

What is the default visibility of a crate in Rust?

• Protected

• Public

• Private

• Internal