MCQ Detailed View

Answer: Both B and C (depending on usage)

The definition of 1 Gigabyte (GB) changes depending on whether the decimal (SI) or binary (IEC) system is used. Storage manufacturers generally use the decimal system, while operating systems often use the binary system.

Decimal (SI) System

1 GB = 1,000,000,000 bytes (10⁹ bytes)

Binary (IEC) System

1 GB (technically 1 GiB) = 1,073,741,824 bytes (2³⁰ bytes)

Practical Example

A hard drive sold as 500 GB will appear as around 465 GB in your operating system because the OS calculates using the binary system, not decimal. This is a common source of confusion for users.

Frequently Asked Questions (FAQs)

Q: 1 GB = How many bytes?

A: In decimal, 1 GB = 1,000,000,000 bytes. In binary, 1 GB = 1,073,741,824 bytes.

Q: 1 GB = How many bits?

A: 1 Byte = 8 Bits, so 1 GB (decimal) = 8,000,000,000 bits and 1 GB (binary) = 8,589,934,592 bits.

Q: Is there a difference between GB and GiB?

A: Yes. GB (Gigabyte) follows the decimal system, while GiB (Gibibyte) follows the binary system. Both are widely used in computing.

Q: Why does my computer show less storage than advertised?

A: Manufacturers advertise storage using decimal GB, while operating systems display binary GB, leading to apparent “loss” of space.

Summary: Both definitions are correct depending on the context. For exams and IT usage, remember that 1 GB can mean either 1,000,000,000 bytes or 1,073,741,824 bytes.