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1. ONLINE COACHING
Computer Awareness
www.ibps-exam.org

2. 01
Personal Computer
02
03
Design Tools and
Programming language
Data Representation and
Number System

3. Personal Computer:
Introduction
• These have slightly better
capabilities and are used generally
for business applications.
• These are single user system.
Currently IBM PC in various
configurations and IBM_PC
compatibles are the most popur
small computers.

4. • Minicomputers: Mini
computers are more powerful than the
microcomputers and can support
several users. They are basically used
for process control systems.
• Main frame computers:
Main frames are very large
computers ,.with very high capacity of
main store. They. can process large.
amounts of data very quickly. So they
are used by banks, big companies and
Govt departments as their main
computer..

5. Super Computers:
• Large supercomputers with faster
processing using multiple processors and
superior technology are used for complex
tasks requiring a lot of computational power.
• The traditional design of a single, processor
handling data and instructions in a single
stream is called the "Von Neumann
designs".
• Each ALU is specialised for a particular
operation, and all capable of performing
simultaneous or "parallel" processing of
different tasks.

6. Design Tools and Programming language :
Introduction
• A vocabulary and set of
grammatical rules for
instructing a computer
to perform specific tasks.
• The term programming
language usually refers to high
­level
languages, such as
BASIC, C, C++, COBOL,
FORTRAN, Ada, and Pascal
Each language has a unique
set of keywords and a special
syntax for organizing program
instructions.

7. • High­level
programming languages,
while simple compared to
human languages, are more complex
than the languages the computer
actually understands, called machine
languages. Each different type of CPU
has its own unique machine language.
• Lying between machine languages and
high ­level
languages are
languages called assembly languages.
Assembly languages are similar to
machine languages, but they are much
easier to program in because they allow
a programmer to substitute names for
numbers. Machine languages consist
of numbers only.

8. Data Representation and Number
System
• IT refers to the methods used
internally to represent
information stored in
a computer.
• Computers store lots of
different types of
information: numbers text
graphics of many varieties
sound At least, these all seem
different to us.

9. Memory
Structure in
Computer
• Memory consists of bits (0 or 1)
a single bit can represent two
pieces of information
bytes (=8 bits)
• A single byte can represent 256
= 2x2x2x2x2x2x2x2 = 28 pieces
of information
words (=2,4, or 8 bytes)
• A 2 byte word can represent
2562 pieces of information
(approximately 65 thousand).
Byte addressable ­each
byte
has its own address.

10. Binary Numbers
• Normally we write numbers using digits 0
to 9. This is called base 10.However, any
positive integer (whole number) can be
easily represented by a sequence of 0's
and 1's.
• Numbers in this form are said to be in
base 2 and they are called binary
numbers. Base 10 numbers use a
positional system based on powers of 10
to indicate their value.
• The number 123 is really 1 hundred + 2
tens + 3 ones.
• The value of each position is determined
by ever­higher
powers of 10, read from
left to right.

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