In an EEPROM data can only be changed by erasing everything and starting over

In an EEPROM data can only be changed by erasing everything and starting over

• A. Data can only be changed by erasing everything and starting over.
• B. Bytes can be rewritten individually without erasing other data
• C. The entire memory is blocked until erased
• D. Data cannot be changed once written

Answer: (A)

The thing this question asks you to understand is how EEPROM writes work compared to RAM. EEPROM is nonvolatile, and to change stored data you don’t just flip a few bits in place. you perform an erase operation first so the memory cells go back to a known state, and then you program the new data. In many simple teaching contexts, that erase step is done for the whole memory (or a large block) before reprogramming, so any change effectively requires erasing and starting over with the new content. That’s why the statement matches the expected behavior: you change data only after erasing the memory and rewriting it. In real devices you may see block-level erases or byte-level edits in different configurations, but the idea tested here is the erase-before-write process.

The thing this question asks you to understand is how EEPROM writes work compared to RAM. EEPROM is nonvolatile, and to change stored data you don’t just flip a few bits in place. you perform an erase operation first so the memory cells go back to a known state, and then you program the new data. In many simple teaching contexts, that erase step is done for the whole memory (or a large block) before reprogramming, so any change effectively requires erasing and starting over with the new content. That’s why the statement matches the expected behavior: you change data only after erasing the memory and rewriting it. In real devices you may see block-level erases or byte-level edits in different configurations, but the idea tested here is the erase-before-write process.