A deterministic algorithm is a type of algorithm that produces the same output for a given input every time it is executed. This means that if you run the algorithm multiple times with the same data, you will always get the same result. Deterministic algorithms follow a defined set of rules or procedures, ensuring predictability and consistency in their performance. These algorithms are commonly used in various fields, including computer science, mathematics, and data processing. Examples include sorting algorithms like quick sort and merge sort, which reliably arrange data in a specific order. Their predictability makes them essential for tasks requiring accuracy and repeatability.