A decidable problem is a computational problem for which there exists an algorithm that can determine whether a given input has a specific property or satisfies a certain condition.
An undecidable problem is a computational problem for which no algorithm can determine whether a given input has a specific property or satisfies a certain condition.
Turing Machine: A Turing machine is an abstract mathematical model used to simulate any computer algorithm. It consists of an infinite tape divided into cells, and the machine can read, write, and move along the tape based on its current state.