Differentiate between the following:
16. Input and output units of computer.
17. RAM and ROM.
18. Secondary memory and cache memory.
19. Tension arm tape drive and vacuum column tape drive.
20. PROM and EPROM
Answers
Answer:
INPUT DEVICE OUTPUT DEVICE
It accepts data from user. It reflects processed data to user.
It is directly commanded by user. It is commanded by processor.
It converts user friendly instruction into machine friendly. It converts machine’s instructions to user intelligible.
It takes the data from the user and sends it to the processor for execution. It takes the processed data from the processor and sends it back to the user.
It helps the computer is accepting the data. It helps the computer is displaying the data.
The design of input devices are more complex. The design of output devices are less complex.
Ex: Keyboard, Image Scanner, Microphone, Pointing device, Graphics tablet, Joystick. Ex: Monitor, Printers, Plotters, Projector, Speakers.
RAM and ROM
Difference RAM ROM
Data retention RAM is a volatile memory which could store the data as long as the power is supplied. ROM is a non-volatile memory which could retain the data even when power is turned off.
Working type Data stored in RAM can be retrieved and altered. Data stored in ROM can only be read.
Use Used to store the data that has to be currently processed by CPU temporarily. It stores the instructions required during bootstrap of the computer.
Speed It is a high-speed memory. It is much slower than the RAM.
CPU Interaction The CPU can access the data stored on it. =The CPU can not access the data stored on it unless the data is stored in RAM.=
Size and Capacity Large size with higher capacity=. Small size with less capacity.
Used as/in CPU Cache, Primary memory. Firmware, Micro-controllers
Accessibility =The data stored is easily accessible= The data stored is not as easily accessible as in RAM
Cost= Costlier =cheaper than RAM.