# Memory management issues 1. placement 2. protection 3. replacement 4. relocation 5. on-demand loading # Classical management schemes 1. Manage main memory directily ( physical memory ) - 물리메모리 접근 2. Single programming system - 한순간 1개의 Task만 수행 3. Fixed partition multiprogramming system - 멀티태스킹 ( 고정 파티션 ) 4. Variable partition multiprogramming system - 멀티태스킹 ( 가변 파티션 ) ㄱ.단편화 1)internal fragment..