Which one of the following represents one billion characters?

Concept

Digital storage units use scale prefixes: kilo is thousands, mega is millions, giga is billions, and tera is trillions. In basic text-storage questions, one character is commonly counted as one byte.

Application

1. The target size in the question is one billion characters.

2. Using the usual one-byte-per-character convention, that is about one billion bytes.

3. The prefix giga names the billion-byte scale, so the matching unit among the offered choices is 1 Gigabyte.

Contrast

• 1 Kilobyte is a thousand-byte scale, far below the target size.

• 1 Megabyte is a million-byte scale, still below the target size.

• 1 Terabyte is a trillion-byte scale, far above the target size.

Result: 1 Gigabyte represents one billion characters under the standard exam convention.