Question

Which one is the first fully supported 64-bit operating system?

• A. Windows vista
• B. Windows 7
• C. Linux
• D. Mac

Answer 1

Answer:

C. Linux

Linux

Linux was an early mainstream operating system to offer full, stable support for 64-bit architectures (such as x86-64) well before mainstream consumer Windows and macOS versions fully transitioned to 64-bit support.