computer system [aboutcomputer99.blogspot.com]

computer system [aboutcomputer99.blogspot.com]

Introduction to Networks View the complete course at: ocw.mit.edu License: Creative Commons BY-NC-SA More information at ocw.mit.edu More courses at ocw.mit.edu

aboutcomputer99.blogspot.com Lec 9 | MIT 6.033 Computer System Engineering, Spring 2005

Mr. Falk, 72, worked for the Analytic Sciences Corp. in Northern Virginia for 23 years. Daniel A. Falk, computer systems analyst

 

Q1. What is Computer?

· Computer is an electronic device in which we feed information throws input devices and gets desired result according to the feeding instruction.

 

Q2 what are the different components of computers?

There are basically three types of components of computers:-

a) Input device: - Input device is basically used for giving the input into the computer.

b) Output device: - Output device are used to get the output giving by the computer.

c) Central Processing Unit (CPU):- Central processing unit is used to control all the process that is running/execute in the computer.

CPU is the brain of the computer.

 

Q3. What are the different types of Generation in Computer?

a) First Generation(1949-1958)

Ø Huge size Computer.

Ø Costly to buy.

Ø Low speed and limited memory

Ø Used Vacuum Tubes.

b) Second Generation(1959-1964)

Ø Compute to first generation small in size.

Ø Low cost.

Ø High speed and more memory space.

Ø Used transistor replacing vacuum tube.

c) Third Generation (1965-70).

Ø Small in size.

Ø Low cost.

Ø Decreased heat generation.

Ø Using Silicone chip integrated circuit.

d) Forth Generation(1971- 1989)

Ø Very small in size.

Ø Low cost.

Ø Much more memory space.

Ø Used very large scale integration circuit (VLSI).

 

 

Q4.

What is CPU?

Ø CPU is the ‘BRAIN’ of our computer.

Ø CPU takes the input from the input devices execute the program step by step and gives the desirable result to output devices for display.

Ø  The CPU performs Arithmetic operations, Logical operations, Input-Output operations, data movements between various parts of storage, data manipulation etc.

Ø CPU contains the three parts â€" Control unit, Arithmetic logic unit & Primary unit.

 

 

 

 

Q5. What are the different types of memories in computer?

a) Main memory:-

1)  Main memory stores the program & data in it up to when the program is executing in CPU.

2)  It is a Volatile storage memory i.e. in it the data is lost if the power supply is switched off.

3)  In it the data is stored in binary form.

 

b)  Secondary memory:-

1)  Main memory provides the small amount of storage space but we required the large amount of storage space then we used the secondary memory.

2)  It is non-volatile memory that is the data retains permanently in it either the power supply is on or off.

3)  Magnetic disks and tapes are the example of secondary memory.

 

Q6. What is the difference between the RAM and ROM?

a) RAM (Random access memory)

1)  It is the place where the computer stores any information that you give as input.

2)  RAM is volatile memory i.e. memory gets lost when you switched off the computer.

b) ROM (Read only memory)

1) It is the area of the memory where the computer’s own operating instructions are stored.

2) This part of memory cannot be changed by anyone.

3) ROM is non-volatile which means the content resides permanently in it whether the computer power is switched Off or On.

 

Q7 Input and Output Devices?

a) Input Devices:-Input devices are used to give the input into the computer. There are number of input devices such as: -    1) Keyboard.

  2) Mouse.

   3) Touch Screen.

  4) Voice Recognizer.

  5) OCR (Optical Character Recognizer).

b) Output Devices: - Output Devices are used to get the output generated by the computer. There are the no. of output devices such as: -   1) Monitors.

  2) Printers.

    3) Plotter.

  4) Projector.

 

Q8 what is networking?

a) A network is the collection of computers and peripheral devices that are able to communicate or share information with each other. They are connected with each other by the cable or without cable.

For e.g. a numbers of computers and one printer are connected with each other through cable then all the computers are able to give the instruction to the printer.

b)  Each computer or peripheral devices are connected in a network is called a node.

 

Find More computer system Topics

Question by algyptalian: computer systems? hey, i was wondering if anyone could help me. I am doing some research for a piece of ict work and i needed to find some information on the kind of things organisations use their computer systems for(eg, what kind of information the organisation stores on its computer) The organisations that i am querrying on are: -medical centres -emergency services(eg:999 or 911 in america) -Medical diagnosis -health advisory services -training of medical staff(in universities, medical schools etc) -Medical research i would be really greatful if you could help me with tis as soon as possible. Thanks for reading. Best answer for computer systems?:

Answer by t-bone
We use a multi-module Health Care system for management of Medical Records, MDS, Incident Reporting, Materials Management, Prescriptions, etc. For inservice training, it was cheaper for us to have a web-based host.

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