Block Diagram of Computer or Simple Model of Computer
- A simple computer system comprises the basic components like Input Devices, CPU(Central Processing Unit) and Output Devices as under:
Input Devices:-
- The devices which are used to entered data in the computer systems are known as input devices.
- Keyboard, mouse, scanner, mike, light pen etc are example of input devices.
FUNCTION OF INPUT DEVICES
- Accept the data from the outside worlds.
- Convert that data into computer coded information.
- Supply this data to CPU for further processing.
Output Devices:
- The devices which display the result generated by the computer are known as output devices.
- Monitor, printer, plotter, speaker etc are the example of output devices.
FUNCTIONS OF OUTPUT DEVICES
- Accept the result form the CPU.
Convert that result into human readable form.
Display the result on the output device.
Memory Unit:
- The data & instruction have to store inside the computer before the actual processing start.
- Same way the result of the computer must be stored before passed to the output devices. This tasks performed by memory unit.
FUNCTIONS OF MEMORY UNIT
- o Store data & instruction received from input devices.
o Store the intermediate results generated by CPU.
o Store the final result generated by CPU.
Arithmetical & Logical Unit:
- The ALU is the place where actual data & instruction are processed.
- All the calculations are performed & all comparisons are made in ALU.
- Performs all arithmetical & logical operations.
- An arithmetic operation contains basic operations like addition, subtraction, multiplication, division.
- Logical operations contains comparison such as less than, greater than, less than equal to, greater than equal to, equal to, not equal to.
Control Unit:
- It controls the movement of data and program instructions into and out of the CPU, and to control the operations of the ALU.
- In sort, its main function is to manage all the activities within the computer system.
- Controls the internal parts as well as the external parts related with the computer.
CPU:
- The Unit where all the processing is done is called as Central Processing Unit.
- It contains many other units under it.
- Main of them are:- Control Unit And ALU (Arithmetic & Logic Unit)
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Basic Computer Questions
Q : The main system board of the computer is called ____.
(A) Motherboard
(B) Processor
(C) Microchip
(D) None of these
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Q : Which of the following system components is the brain of a computer?
(A) Circuit board
(B) CPU
(C) Memory
(D) Network card
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Q : What is the built-in permanent memory in a computer called?
(A) RAM
(B) ROM
(C) CPU
(D) CD-ROM
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Q : Which of the following is the full form of NTFS?
(A) New Tree File system
(B) New Technology file system
(C) New Table file system
(D) Both B and C
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Q : Which of the following is not a hardware processing chip ?
(A) Processing chip
(B) printer
(C) mouse
(D) Java
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Q : The monitor of a computer is-
(A) storage device
(B) processing device
(C) input device
(D) output device
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Q : Which protocol does Ping use?
(A) TCP
(B) ARP
(C) ICMP
(D) BootP
(E) None of these
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Q : If you wish to extend the length of the network without having the signal degrade, you would use a ___.
(A) Gateway
(B) Router
(C) Modem
(D) Repeater
(E) Resonator
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Q : A series of instructions that tells a computer what to do and how to do it is called a ______.
(A) program
(B) command
(C) user response
(D) processor
(E) None of these
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Q : Verification of a login name and password is known as_____.
(A) Configuration
(B) Accessibility
(C) Authentication
(D) logging in
(E) None of these
Answer ⇒ ??