COP-4600 Exam #1 (2023) || Complete Questions & Answers (100% Correct)

COP-4600 Exam #1 (2023) || Complete Questions & Answers (100% Correct) COP-4600 Exam #1 (2023) || Complete Questions & Answers (100% Correct) What is operating system? - ANSWER - OS is a resource allocator OS is a control program Basically manages hardware using software. Client-server and peer-to-peer computing - ANSWER - P2P: All nodes are both clients and servers Client-Server: Servers respond to requests generated by clients. Will never generate a request. Dual mode operation, timer - ANSWER - Dual mode operation: Allows OS to protect itself and other system components. User mode and kernel mode differentiated by a mode bit. Timer: Prevent infinite loop / process hogging resources. Set interrupt after specific period. Operating System Structures - ANSWER - OS Services User OS interface System calls Operating System design and implementation OS Structure Virtual Machines OS Services - ANSWER - User functions: UI Program execution IO File-system manipulation Communications Error detection Other functions: Resource allocation Accounting Protection and security User OS interface - ANSWER - Command Line Interface (CLI) GUI System Calls - ANSWER - Provide a means for user or application programs to call upon the services of the OS. Think APIs. Win32, POSIX, Java API Types of System calls - ANSWER - Process Control File management Device management Information maintenance Communications