Look, a nice puzzle. Solve it and win great prizes!

1. _________ (7 letters) - A C++ output stream class commonly used to send output to the console.
2. _________ (3 letters) - A past tense verb, often used in logging or indicating a completed task.
3. _________ (3 letters) - A negation commonly used in boolean logic or programming conditions.
4. _________ (6 letters) - A command or function that removes an object, file, or memory allocation in programming.
5. _________ (7 letters) - In object-oriented programming, a term referring to an instance acting upon itself.