General Rust

Question 1

Why use Self

Answer 1

When u change the Struct name u dont have to change the return Type

Question 2

Explain:

1. What is Arc
2. How does it work
3. Usecase of Arc

Answer 2

1 and 2. The type Arc<T> provides shared ownership of a value of type T, allocated in the heap. Invoking clone on Arc produces a new Arc instance, which points to the same allocation on the heap as the source Arc, while increasing a reference count. When the last Arc pointer to a given allocation is destroyed, the value stored in that allocation (often referred to as “inner value”) is also dropped.</T>

3. When to Use Arc:

Multiple Ownership Across Threads:

When data needs to be shared between threads
When multiple threads need ownership

Shared Resources:

Database connections
Configuration data
Cache implementations
Connection pools

Thread Safety Requirements:

When you need thread-safe reference counting
When data must be shared across thread boundaries

Long-lived Data:

Resources that outlive their original scope
Data that needs to persist across async operations

Worker Patterns:

Thread pools
Background task processors
Event handlers

Question 3

Explain:

1. What is Rc
2. How does it work
3. Usecase of Rc

Answer 3

1. What is Rc?

Single-threaded reference counting smart pointer
Enables multiple ownership of the same data
Keeps track of the number of references to a value
Only for use in single-threaded scenarios

2. Memory Management:

Data is freed when reference count reaches zero
All clones share the same data
Thread-unsafe but more efficient than Arc

3.
1. Multiple ownership situation

2.Data Structures:
Graphs
Trees
Linked Lists
Any structure where nodes might have multiple owners

3. Caching