Introduction to Computer Fundamentals Unit 1

Introduction to Computer Fundamentals Unit 1

Computer fundamentals introduce essential concepts and definitions related to computers, including their characteristics, data processing cycles, and classifications. This unit covers key topics such as input, processing, output, and storage functions of computers. It also explores various types of computers based on data processing and highlights the importance of understanding computer architecture. Ideal for beginners and students seeking foundational knowledge in computer science, this unit serves as a stepping stone for further studies in technology and computing.

Key Points

  • Defines what a computer is and its primary functions.
  • Explains the characteristics of computers, including speed and accuracy.
  • Describes the data processing cycle and its significance in computing.
  • Classifies computers based on data processed, including analog, digital, and hybrid types.
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Prepared By: Meghna Bhatt
Computer fundamental
UNIT: 1 INTRODUCTION TO COMPUTER
1.WHAT IS COMPUTER?
The word “computer” is comes from the word “TO COMPUTE” means to
calculate.
A computer is normally considered to be a calculation device which can perform
the arithmetic operations very speedily.
A computer may be defined as a device which operates upon the data.
Data can be in the form of numbers, letters, symbols, size etc. And it comes in
various shapes & sizes depending upon the type of computer application.
A computer can store, process & retrieve data as and when we desired.
The fact that computer process data is so fundamental that many people have
started calling as “Data Processor”.
A computer first it gets the Data, does Process on it and then produces
Information.
DEFINATION OF COMPUTER
o A computer is an electronic device which takes input from the user,
processes it and gives the output as per user’s requirement.
o So the main tasks of performed by the computer are:
Input
Process
Output
2.WRITE DOWN THE CHARACTERISTICS OF COMPUTER
Some important characteristics of the computer are as follow:
Automatic:
o Computers are automatic machines because it works by itself without
human intervention.
o Once it started on a job they carry on until the job is finished.
o Computer cannot start themselves.
DATA
PROCESS
INFORMATION
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o They can works from the instructions which are stored inside the system in
the form of programs which specify how a particular job is to be done.
Accuracy:
o The accuracy of a computer is very high.
o The degree of accuracy of a particular computer depends upon its design.
o Errors can occur by the computer. But these are due to human weakness,
due to incorrect data, but not due to the technological weakness.
Speed:
o Computer is a very fact device. It can perform the amount of work in few
seconds for which a human can take an entire year.
o While talking about computer speed we do not talk in terms of seconds
and milliseconds but in microseconds.
o A powerful computer is capable of performing several billion (109) simple
arithmetic operations per second.
Diligence:
o Unlike human beings, a computer is free from monotony, tiredness & lack
of concentration.
o It can continuously work for hours without creating any error & without
grumbling.
o If you give ten million calculations to performed, it will perform with
exactly the same accuracy & speed as the first one.
Versatility:
o It is one of the most wonderful features about the computer.
o One moment it is preparing the results of a particular examination, the
next moment it is busy with preparing electricity bills and in between it
may be helping an office secretary to trace an important letter in seconds.
Power of remembering:
o Computer can store and recall any amount of data because of its high
storage capacity of its storage devices.
o Every piece of information can be retained as long as desired by the user
and can be recalled as and when required.
o Even after several years, if the information recalled, it will be as accurate
as on the day when it was filled to the computers.
No I.Q.
o A computer is not a magical device; it processes no intelligence of its own.
o Its I.Q. is zero.
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Prepared By: Meghna Bhatt
o It has to be told what to do & in what sequence.
o It cannot take its own decision.
No Fallings:
o A Computer has no feelings because they are machines.
o Based on our feelings, task, knowledge and experience we often make
certain judgments in our day today life.
o But Computer goes exactly the way which we have given the instructions.
3.EXPLAIN THE DATA PROCESSING CYCLE OF
COMPUTER.
The computer Data Processing is any process that a computer program does to
enter data & summarise, analyse or convert data into useable information.
The process may be automated & run on a computer.
It involves recording, analysing, storing, summarising & storing data.
Because data are most useful when it is well presented & informative.
The Data Processing Cycle:
Data Processing cycle described all activities which are common to all data
processing systems from manual to electronic systems.
These activities can be grouped in four functional categories, viz., data input,
data processing, data output and storage, constituting what is known as a data
processing cycle.
The main aim of data processing cycle is to convert the data into meaningful
information.
Data processing system are often referred to as Information System.
The Information System typically take raw Data as Input to produce Information
as Output.
INPUT OUTPUT
The data processing cycle contains main four functions:
o Data input
DATA
PROCESS
INFORMATION
STORAGE
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FAQs of Introduction to Computer Fundamentals Unit 1

What are the main characteristics of computers?
Computers possess several key characteristics that define their functionality. These include automation, accuracy, speed, diligence, versatility, and the ability to remember vast amounts of data. Automation allows computers to perform tasks without human intervention, while accuracy ensures high precision in calculations. Speed refers to the capability of computers to process data much faster than humans. Diligence means that computers can work tirelessly without fatigue, and versatility highlights their ability to perform various tasks. Lastly, their power of remembering enables them to store and recall information accurately over time.
What is the data processing cycle in computers?
The data processing cycle is a fundamental concept that describes how computers handle data. It consists of four main functions: data input, data processing, data output, and data storage. Initially, data is input into the computer system, where it is then processed to convert it into meaningful information. After processing, the output is generated, which can be displayed or stored for future use. Finally, data storage involves saving the processed information for later retrieval. This cycle is crucial for understanding how computers transform raw data into useful insights.
How are computers classified based on data processing?
Computers can be classified into three main types based on how they process data: analog, digital, and hybrid computers. Analog computers work with continuously variable data, making them suitable for tasks like measuring physical quantities. Digital computers, on the other hand, process discrete data and are the most common type used today, capable of performing complex calculations. Hybrid computers combine features of both analog and digital systems, allowing them to process both types of data effectively. Understanding these classifications helps in selecting the appropriate computer for specific applications.
What are the primary tasks performed by computers?
Computers perform three primary tasks: input, processing, and output. Input involves receiving data from various sources, such as keyboards or scanners. Once the data is inputted, the computer processes it according to predefined instructions, which may include calculations, comparisons, or data manipulation. Finally, the output stage produces results that can be displayed on screens, printed, or stored for future reference. This cycle of input, processing, and output is fundamental to the operation of all computer systems.

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