Fundamentals of computer

1. FUNDAMENTALS OF COMPUTER
1. What is a computer ?
Ans: Computer is an electronic device. It accepts data as input, process the
data and displays the result as output.
2. Draw the block diagram of computer
Ans: process
A.L.U: Arithmatic and logical unit
M.U: Memory UNIT
C.U: Control Unit
3. What is an Input device?
Ans: Input device is a device used to give data to computer
4.Give some examples of Input devices.
Ans Examples of Input devices are Keyboard, Mouse, Joystick, Barcode Reader,
Light pen, Touch screen, Scanner, Stylus, Magnetic ink caharacter reader (MICR)
etc.,
5. What is an Output device?
Ans: Output device is a device used to display the result from the computer to the
user.
6.Give some examples of output devices.
Ans:Examples of output devices are Monitor, Printer, Speaker, Projector etc.,
7. What is Data?
Ans: Data includes facts, figures , symbols and letters . Which we give from the
input devices
8. What is CPU?
Input Output
A.L.U
M.U
C.U

2. Ans: CPU stands for Central processing unit . It is a device where all the
information is stored and processed.It is the brain of the computer. Internally it
contains three units., (i) Memory Unit (ii) Control Unit (iii) Arithmatic and Logical
unit (ALU)
9. What is a memory?
Ans: Memory is a part of the computer where data, instructions and programs are
stored.
Memory is divided into two
1. Primary memory
2. SecondaryMemory
10. Draw the classification of computer memory
11. Write the full forms of the following
Ans: a) RAM: RANDOM ACCESS MEMORY
b) SRAM: STATIC RANDOM ACCESS MEMORY
c) DRAM: DYNAMIC RANDOM ACCESS MEMORY
d)ROM: READ ONLY MEMORY
E)PROM: PROGRAMMABLE READ ONLY MEMORY
f) EPROM: ERASABLE PROGRAMMABLE READ ONLY MEMORY
g)EEPROM: ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY
MEMORY
12. Write any four types of printers
Ans:1. Laser Printer
2. Dot matrix printer
3. InkJet printer
4. Daisy wheel printer