Tell about the statuses of operations and the types of operations you have worked with.

In my practice working with operations, I often encountered the following statuses:

• Pending — the operation is accepted but not yet processed.
• In Progress — the operation is being executed.
• Success — the operation was completed successfully.
• Failed — the operation ended with an error.
• Cancelled — the operation was canceled by the user or system.

The types of operations depend on the domain, but usually include:

• Create — creating new entities.
• Read — retrieving data.
• Update — modifying existing data.
• Delete — deleting data.
• Transactional operations — for example, transferring funds, booking, order confirmation.

In testing, I checked the correctness of status transitions, error handling, and compliance with business logic for each type of operation.