5. Is a microkernel need to be a component of an OS always? comparable to the modular method.?

Please refer to this textbook: “A. Silberschatz, P. B. Galvin and G. Gagne, “Operating System Principles,”7th Edition, John Wiley & Sons Inc., 2006.”   And answer the following questions: Question: Which mutual exclusion algorithm requires, on average, the fewest messages in a group of 100 machines? centralized. Token-ring. Lamport' s . Ricart & Agrawala

4,4,n,n 9, 5, space, g 15,5,i,g O 8,5,n,g O None of the above

Consider the following ls -l output:   -rwxr-xr-- 2 fred     users     0 Jan 26 13:08 22   sample.mp3   a. Read, write, and execute b. Read, execute c. Read, write d. Only read