COMPUTER PROGRAMMING UNIT 1 Lecture 1

COMPUTER
PROGRAMMING
Subject Code IB3
Lecture 01
Prepared By Mr. V. S. Patil Dept (CSE)/AEC

Unit 1 Problem Solving
Syllabus

3
2
1
 Understand functional parts of computers
Understand Characteristics of
computer
Understand the basics of
computing
Objectives

Computer…
Comes from the word “compute”
Compute means “to calculate”
So Computer is calculating device
Perform calculations at enormous speed
Computer is device that operates upon “Data” or
“Information”
e.g. preparing results, calculations, transactions,
scientific work etc
4Prepared By Mr. V. S. Patil Dept
(CSE)/AEC

Computer…
Computer can input “Data”
Computer can process “Data”
Computer can store “Data”
Computer can retrieve “Data”
Finally…
Computer can be termed as “Data Processor”
5Prepared By Mr. V. S. Patil Dept
(CSE)/AEC

Characteristics of Computer
Prepared By Mr. V. S. Patil Dept
(CSE)/AEC

Characteristics of Computer
1. Speed
2. Accuracy
3. Diligence
4. Versatility
5. Power of remembering
6. No I.Q
7. No Feelings
(CSE)/AEC

...Characteristics of Computer...
Speed...
 Fast device
 Work done as anormous speed as compare
to human beings
 Speed of Computer is meaured in term
microseconds,nanoseconds,and ever
picoseconds
(CSE)/AEC

Accuracy...
 Work with the higgest
Accuracy
 Accuracy depends upon the
"Design of Computer"
 Human Errors are like wrong
command, inaccurate data
input etc
(CSE)/AEC

Diligence...
 Free from "monotony"
 Free from "Tiredness"
 Free from Lack of
"Consentration"
(CSE)/AEC

Versatility...
• Can perform all kind of job
simultaneously
• Can do diverse nature of
works like
calculations,graphics
work,searching etc at the
same time
(CSE)/AEC

Power of Remembering...
• Unlike human being Computer can store huge amount of data
• Doesn't differentiate "Important" & "Not Important"
• Loss or Deletion of data is done by User
(CSE)/AEC

No IQ...
• Not a thinking machine
• Not Intelligent
• Never does a task as it own
• Follow human Instuctions
(CSE)/AEC

No Feeling...
• Follow Human Instructions
• Never decides at its own will
• No taste
• No emotions
• No knowledge
(CSE)/AEC

Memory Unit
Input Unit
Output
Unit
Register
ALU
Control
Unit
Fig. Block Diagram of Computer System

• Computers need to receive data and instruction in order
to solve any problem.
• Accept the data and instructions from the outside world.
• Convert it to a form that the computer can understand.
• Supply the converted data to the computer system for
further processing.
• Keyboard is the one of the most commonly used input
device.
• Example:
mouse, Scanner, Light Pen, Joystick, Touch Screen
etc.
Input Unit
(CSE)/AEC

•The storage unit of the computer holds data and
instructions that are entered through the input unit, before
they are processed.
• It stores the intermediate and final results before these
are sent to the output devices.
•It also saves the data for the later use.
•The various storage devices of a computer system are
divided into two categories.
Storage Unit….
(CSE)/AEC

1. Primary Storage:
•Stores and provides very fast.
• The primary memory is temporary in nature. The data is
lost, when the computer is switched off.
•Ex.RAM.
2. Secondary Storage:
•Secondary storage is used like an archive.
•It stores several programs, documents, data bases etc.
•Some of the commonly used secondary memory
devices are Hard disk, CD, etc.,
Storage Unit….

Output Unit
•The output unit of a computer provides the information and
results of a computation to outside world.
• Ex. Printers, Visual Display Unit (VDU) are the commonly
used output devices.
•Other commonly used output devices are Monitor,
Speaker, Plotter.
(CSE)/AEC

The control unit and ALU of the computer are together
known as the Central Processing Unit (CPU).
The CPU is like brain performs the following functions:
• It performs all calculations.
• It takes all decisions.
• It controls all units of the computer.
Central Processing Unit
(CSE)/AEC

• Arithmetic Logical Unit:
The Arithmetic unit can perform basic arithmetic
operations such as addition, subtraction, multiplication,
division, etc
• And Logical unit can perform basic operations viz, >, <, =,
‘etc..
CPU can be divided in to
following
(CSE)/AEC

Control Unit:
It controls all other units in the computer.
It fetches the instruction from memory which is to be Executed
It instructs the input unit, where to store the data after receiving
it from the user.
It controls the flow of data and instructions from the storage unit
to ALU.
It also controls the flow of results from the ALU to the storage
unit.
The control unit is generally referred as the central nervous
system of the computer that control and synchronizes its
working.
Continue..

Question Bank
1.Differentiate data & information.
2.Explain the Characteristics of computer.
3.Define computer.
4.Define i) Software ii) Program iii) ALU
iv) Compiler v) Hardware
1.Explain the working of computer.
2.Explain organization of computers.

COMPUTER PROGRAMMING UNIT 1 Lecture 1

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