Anyone please answer this question??

14. Memory manager uses the following algorithms to allocate memory spaces EXCEPT A. B. C. D. Fast fit Best fit Worst fit First fit 15. Which of the following is the main reason for the need to manage input and output? A. B. C. D. Memory space need to be allocated to satisfy request Device such as a mouse or keyboard generates interrupt Several devices perform input/output operations at the same time 1/o bound processes requires to use various devices 16. "The CPU will check the status of the printer periodically." Which of the following I/O communication techniques does the statement refer to? A. B. C. D. Programmed I/O (with Polling) Interrupt Driven I/O Direct Memory Access (DMA) Sequential access 17. The following are security mechanisms that can be used to overcome password vulnerabilities EXCEPT A. B. C. D. Single sign-on (SSO) Password encryption Brute forced One-time password 18. A person who is using a computer or and has the authority to new user profiles, limit access to file/folders, or to control other users are called A. B. C. D. intruder hacker privileged user computer user 19. bit when a command is available for the controller to The host sets execute. A. B. C. D. write status command-ready control 20. When hardware is accessed by reading and writing to the specific memory locations, then it is called A. B. C. D. port-mapped I/O controller-mapped I/O bus-mapped I/O none of the mentioned