1. Computer system
돈벌자

2. Keyboards Disk drives Magnetic tape drives Mouse devices
Hardware
Keyboards
Disk drives
Floppy : personal
Hard : rigid much faster access to their information.
Magnetic tape drives
Mouse devices
Bar code readers
USB
Input device
Output device
Main memory
CPU

3. Disk drives Magnetic tape drives Screen Printers USB Hardware
Input device
Output device
Main memory
CPU

4. volatile RAM Hardware Input device Output device Main memory CPU
An important characteristic of main memory is that it is volatile.
RAM
Another important characteristic of main memory is
its access method, which is Random Storage Management.
Input device
Output device
Main memory
CPU

5. CPU(Central processing unit)
Hardware
Input device
CPU(Central processing unit)
컴퓨터 시스템 전체를 제어하는 장치로서,
다양한 입력장치로부터 자료를 받아서 처리한 후
그 결과를 출력장치로 보내는 일련의 과정을 제어하고
조정하는 일을 수행한다.
Output device IN
CPU
MEM
OUT
Main memory
CPU
The results go to the output device
The CPU sends the processed data back to memory
Data flows from the input device into main memory
The CPU brings the data into its registers for processing

6. Operating System(OS) Software OS Loader Trap Concurrent
컴퓨터의 하드웨어 시스템을 효율적으로 운영하기 위한 소프트웨어.
컴퓨터를 작동하고 시스템 전체를 감시하며, 처리하여야 할 데이터의
관리와 작업 계획 따위를 조정하는 여러 가지의 프로그램으로
구성되어 있다.
- File management
- Memory management
- Processor management OS
Loader
Trap
Concurrent

7. Loader Software OS Loader Trap Concurrent
An important function of an operating system is
to manage the jobs that users submit to be executed OS
Loader
Trap
Concurrent

8. Traps (interrupt) Trap handler Software Input device Loader Trap
Synchronous interrupt : software interrupt
Asynchronous interrupt : Time outs, I/O completion
Trap handler
Input device
Loader
Trap
Concurrent

9. Multiprogramming Multiprocessing CPU scheduling Problem Software
- Preemption : RR/SRP
- Non-Preemption : FIFO/SJF/HRN
Problem
- Critical Section / mutual exclusion
Input device
Loader
Trap
Concurrent Process

10. Uniprograming Multiprograming Paging Segmentation Storage Management
fixed-partition : Internal/External Fragmentation.
variable-partition : first/best/worst-fit algorithm.
External Fragmentation.
coalescing/ compaction
Paging
Segmentation
주기억장치
가상기억장치

11. Page replacement algorithm
Hardware
Page replacement algorithm
FIFO / LRU
주기억장치
가상기억장치

12. Database Relation Queries Database System Database
A database is a collection of files that
Contain interrelated information,
and a database system is a program that lets the user
add, delete, and modify records in the database.
Relation
Relational database systems store information in files that
appear to have a table structure.
Queries
Select / Project / Join
Database

13. # Function Recursive function Mutual recursion
Programming – C++ #
Function
A common term for a function return void is procedure,
and a common term for a function that returns some other type
is just function.
Recursive function
Mutual recursion
Dynamic memory allocation
(new/delete) -> int* pVal = new int;
(malloc/free) -> int* pVal = (int*)malloc(sizeof(int));
C++

14. The carry bit/ The overflow bit Two’s Complement Binary Representation
Information representation
Binary storage
ASCII -> UNICODE
Base conversions
Decimal->binary
The carry bit/ The overflow bit
Two’s Complement Binary Representation
sign bit / NOT operation+1
Floating Point Representation
hidden bit/ Exceed Representations
Information