The Main Components Of Computer Systems
Bayani Gaba-gaba
Strip a computer down to its essentials and four parts do almost all the work: the central processing unit that thinks, the two kinds of internal memory that hold what it is thinking about, and the backing storage that remembers everything when the power goes off. Understanding how these pieces pass data to one another, and why some forget instantly while others never do, is the key to understanding how every computer behaves.
In this lesson you will follow data as it enters through input devices, is processed by the CPU, moves between RAM and ROM, and is saved to a hard disk or solid-state drive before the results leave through output devices. You will learn the precise differences between RAM and ROM, between input and output devices, and between fast internal memory and large backing storage, the exact comparisons that ICT exams ask for again and again.
Manufura
- Central Processing Unit (CPU).
- The role of the CPU in processing instructions entered into the computer in order to produce an output.
- Internal memory.
- Characteristics of ROM and RAM Differences between ROM and RAM.
- Input and output devices.
- Characteristics of input and output devices Differences between input and output devices.
- Backing storage.
- Characteristics of backing storage Differences between backing storage and internal memory.
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- Which part of the CPU carries out calculations and logical decisions? A. Control unit B. Arithmetic and logic unit C. Register D. Bus Answer: B
- Which statement about RAM is correct? A. It is non-volatile B. It can only be read from C. Its contents are lost when power is off D. It stores the BIOS Answer: C
- Where is the BIOS start-up code stored? A. RAM B. ROM C. The hard disk D. A register Answer: B
- Which is true of backing storage compared with RAM? A. It is faster B. It is volatile C. It has a larger capacity D. It is read directly by the CPU Answer: C
- Which device is both an input and an output device? A. Keyboard B. Printer C. Touch screen D. Microphone Answer: C
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