✅ OSI Layer 7 통신을 7단계로 표준화하여 효울성을 높이기 위함. 7계층을 이용하여 네트워크 상에서 데이터를 전송할 때 필요한 정보들을 헤더로 넣어주는 개념 OSI? Open Systems Interconnection Why divide into 7 layers? Can ackn...

I/O can take place in kernel level process, thread needs to request for I/O in kernel ✅ Blocking I/O block user process during I/O Process(Thread) requests I/O in kernel When ke...

✅ Deadlock requirement for system resource order is mixed up when more than two processes/threads cannot be run bc there is no resource wait infinite for resource occurs when severa...

✅ Scheduling order plan to allocate CPU to thread process on ReadyQueue will be scheduled First in queue has CPU first Overhead ⬇️ / Usage ⬆️/ Stavation ⬇️ Batch System: throughout(처리량...

✅ Inter Process Communication communication among processes 💡 process have independent memory, is run independently use semaphore, mutext(only one process for shared data) ✅ Types of Inter...

✅ Process Management manage multiple process by scheduling in order for Process Management, CPU needs to know which process is who ➡️ Process Meatadata Process Metadata proce...

✅ System Call request services from the operating system program makes system call to request operating system’s kernels user program can interact with the operating system using a system c...

✅ Interrupt signal emmited from hardware or software when process or event needs immediate attention if an error occurs during running a program stop the program and alert CPU for immediate att...

✅ Process Address Space when program is run on CPU process is created process address space is allocated on memory ✅ Process Address Space Segment Code Segement: save program source ...

✅ Process programs that are dispatched from the ready state and are scheduled in the CPU for execution. 메모리 상에서 실행중인 프로그램 1️⃣ System call: to create process 💡 System call https://soheepar...