Which of the Following is Not An Operating System

1. Linux
2. Windows
3. Oracle 
4. DOS

Answer – Option 3, Oracle

Oracle is not an operating system. It is a multi-model database management system that is produced and marketed by Oracle Corporation. Hence, option 3 is the correct answer. 

• An operating system is a program that manages the computer hardware, software resources, and provides services for the computer programs. It benefits computer software and software development.
• Oracle is also known as OracleDB or simple Oracle that was created by Lawrence Ellison in 1977.
• Linus, Windows, Android, Chrome OS, DOS, etc. are the operating systems.