11. Which of the following is not an operating system?

1. Oracle
2. Windows
3. Linux
4. Dos

12. The systems which allow only one process execution at a time, are called as ____________

1. Uniprogramming systems
2. Uniprocessing systems
3. Unitasking systems
4. None of the mentioned

13. If there are multiple recycle bins for a hard disk

1. You can set different size for each recycle bin
2. You can make any one of them default recycle bin
3. You can choose which recycle bin to use to store your deleted files
4. None of the mentioned

14. In the operating system each process has its own

1. Address space and global variables
2. Pending alarms, signals and signal handlers
3. Open files
4. All of the mentioned

15. Two operating modes of AT are

1. Direct mode, indirect mode
2. Virtual mode, dedicated mode
3. Private mode, public mode
4. Real mode, protected mode

16. Which is the first program run on a computer when the computer boots up?

1. System software
2. Operating system
3. System operations
4. None

17. Which of the following refers to associative memory?

1. The address of the data is generated by the CPU
2. The address of the data is supplied by the users
3. The data are accessed sequentially
4. There is no need for an address i.e. the data is used as an address

18.  Which of the following is a database of information about the windows operating system including customized settings and software installations?

1. Registry
2. Performance Monitor
3. Changelog
4. None of the mentioned

19. Scheduling of threads is done by

1. Output
2. Operating System
3. Input
4. Memory

20. What else is a command interpreter called?

1. Prompt
2. Kernel
3. Shell
4. Command