Variable is a symbolic name or reference to an information. They provide a way of labeling data with a descriptive name and provide a way to manipulate information. In Rust, to declare a variable, you use a "let" statement.

Cargo is package manager for Rust's and its build system. Cargo is used to search for, install, and manage packages that you want to use and build them. Cargo is also the test runner, and the documentation generator.

Rust is a systems programming language pursuing the trifecta: safety, which is guaranteed at compile time; fearless concurrency, which is a lot easier when things are safe; and blazingly fast speed due to zero-cost abstractions and other nice things.

ALPHV BlackCat Ransomware or simply BlackCat Rasomware is an advance and a sophisticated piece of malware written in Rust programming language. It encrypts data of business users and corporate networks using a combination of AES-128 (CTR mode) and RSA-2048 algorithms, and then requires a large ransom in BTC or Monero for the decryption key.

Exceptions or Errors (in rust) is a state of a program when a piece of code does not execute as it should. It may be due to a resource that should be available at this time but is not.