12. Which of the following is the functions of Operating systems? a) Process Management b) Memory Management c) File Management d) All of the above 13. Which of the following is UNIX- based operating system ? a) Linux b) Solaris c) Apple OS x d) All of the above 14. Which of the following is NOT a UNIX - based operating system? a) Windows 10 b) Apple OS X c) Linux d) All of the above 15. Which of the following can be components of Process management? a) Thread management b) Process synchronization c) CPU scheduling d) All of the above 16. Which of the following purpose of computer security describes methods to checek that data is not changed or modified ? a) Confidentiality b) Integrity c) Availability d) All of the above 17. Convert a binary number 00010111 to decimal number. Please, include all calculations