Question

________ can be written only once. The data cannot be erased or written over once it is saved.​

Answer 1

WORM (Write Once, Read Many)

Step-by-step explanation:

The full meaning which means Write Once, Read Many implies that data can only be entered (or better put, written) once. Once the data has been written, the data can not be updated or deleted. However, the data being stored on WORM can be read as many times, as possible.

Hence, WORM answers the question.