ANTIVIRUS AND VIRUS

ANTIVIRUS

A  Software  program which is used to  prevent ,detect,  and  remove malware  .

When you use  antivirus  it  doesnt  mean that  your  system is fully  protected ,you  should  able to understand  the

PRINTER

PRINTER

As we know that  print out are  taken in daily life ,for personal or professional task , but for various types of printouts  different

Types of computers are used ,in electricity bill the printer used is pocket printer , hotel bills which have holes on the left and right

Side vertically they use dot matrix printer , not only hotel people uses dotmatrix printer but many  different  types of companies

Uses this printer ,because it is time consuming there is no need to  insert the paper every time , at once you can use more than

100 or more than that ,only when the task is  the print button is clicked and  bill is generated. But this type of printer  cant be used

When you are taking printouts for  project , you should use inkjet printers.


(NOTE :  The above information is only for education purpose if you write this thing in exam the  evaluator doesnt  give the

The actual marks  if it  is   asked  for 4marks     they will give 2 marks , you should important points of various printers )

Dot matrix  printers

Line printers

Laser printers

Inkjet printers

They are also other types of  printers  ( dont   write  bulky paragraph about each printer , the better way is  write  the powerful

Points  about each printer  for  example  every printer  prints  the  paper  but what  is  time  consumed is important  point

So you can use the time consumed as a hint  and  write the  time consumed  for all  the  printers ,and  how many  pages  printout

Can  be taken in one minutes  as well writing physical components used  in every printer  has the great impact, so refer your  text

Book  or  some websites   and write important  points  so that  you  can remember in easiest way  but dont simply mugup )

OPERATING SYSTEM

OPERATING SYSTEM

If you have gone through the text book  you may feel uncomfortable seeing the theory  from top to toe , usually you know  that

Operating systems  like  window,unix ,android and different versions about them  , and  some of them know  how to install

Operating system which is easy as well as complex ,

There are other types of operating system  like single user,multi user ,multitasking ,real time processing and more .

Here  you will learn  about  working  of operating system.

Dead locks ,fragmentation, process control block (PCB)  and many other interesting things ,

HINT : IN text book  starting five chapter look  difficult  and others easy but if  you are perfect in first five chapter then

It is like a jackpot you can score good marks ..

Dont look text book and scratch your head if you are studying from starting of the semester ,then learn as you will means

Just what occurs to your mind and try to completely study about them ,like  structure of operating system different layers

How computer is able to do multitasking ,

What is a process ,scheduling ,segmentation ,overlays ,paging ......


NOTE : MCB recommends students to make notes of   your  own in simply english language ,because

               Studying for knowledge and exams  are entirely different , notes always helps  during examination

               In our upcoming post  we will focus on each on every  part  of  operating  system , which will  be  sufficient

               For knowledge as well  as  scoring marks , if  you have some good  notes  about  operating  system

              Then share with us  we will post  in our site with your name and details  .   

INTERNET

INTERNET

According to the 2013 survey  40%  of the  worlds   population uses  internet  , today  using internet  holds  greater  impact

You can pay the bills online   just on a click , booking movie ticket online no need to stand in queue  and wasting your  precious

Time as well as you can book the desired seats , you can sit at home and work online  , which  is the luxurious of  doing work ,

Downloading movies  ,songs  and  much more,  easily  seeing  the menu of  popular pizza  and getting it in  less than 20 minutes

Recharging your  cell phone , taking doctor advice online , get educated online  and  many other beneficial things,


But this are the common things  as the technological student  you should know  how the webpages are created  ,

Which are the  languages  used in building  websites , how to create the applications  , how the  applications works

It is easy thing to download apps  app stores  and if you are  dissatisfied  just  removing  and ticking unlike button,

But  to create app which wins people hearts is  should have good  knowledge  and  extreme intelligency   ,they are many famous

Apps  which  are  earning great  amount of  money  ,playing  flash  games  are fun  but creating it  .


You may see  ADDS  displaying people  earning lakhs of money online  ,but  everyone  cant  make  it  only few  because

Of knowledge  and intelligency , if you are a good painter  then you can display  your art  to the whole world through

The help of websites , making websites is not a big task  other wise you can hire professionals  for doing that ,

You can  display  your  art  around the globe ,and it is a source of income too.

Working of  internet  you should know about  internet protocol address, TCP/IP ,modem ,routers and switching techniques which

Will be posted later. 

CHARACTERISTICS OF DBMS

A database management system is a collection of program that enables user to create is maintaining a database.
                                   
            The DBMS is hence is general purpose software system that facility the process of defining constructing and manipulation database for various applications

 CHARACTERISTICS OF DBMS:
                     
*      Information systems should allow interaction access to data to obtain new information without writing fresh programs.

*      System should be designed to co-relate different data to meet new requirements.

*      Data should be stored with minimum redundancy to ensure consistency in stored data across different application.

*      An independent central repository, which gives information and meaning of available data, is required.

*      Integrated database will help in understand is the inter-relationships between data stored in different applications.

*      The stared data should be made available for access by different users simultaneous.

*      Automatic recovery feature has to be providing to overcome the problems with processing system failure.

MS DOS COMMAND

Attrib

The attrib command is used to change the attributes of a single file or a directory.
Break

The break command sets or clears extended CTRL+C checking.

COMPUTER MEMORY

MEMORY

The term "memory" applies to any electronic component capable of  storing data.

Memory  can be categorized in to two types

1. Internal memory

2. External memory

Internal memory 

It is used to store the data temporary.

It uses micro conductors ,Ex. Electronic circuits.

Internal memory corresponds to random  access  memory.

External Memory 

It is also called physical  or auxiliary memory.

It is used to store the data permanently.

Examples  of external memory are hard disk, compact disk, Digital video disk, ROM.

Characteristics of memory are

*Capacity

*Access time

*Cycle  time

*Through  output

*Non Volatility


Types  of memory

1. Random access memory.

2. Read  only  memory.

3. Flash memory.


Random  access  memory. (RAM)

It is the main memory of  the  computer.

When  a program  is running  temporary  data  is stored here .

RAM is volatile  means that it only stores data as long as it supplied with electricity.

When the computer is turned off, all the data in the memory are immediately erased.

Read  Only  Memory 

ROM is non volatile.

It has only read  only access.

Types  of  ROM are
 1.PROM ( programmable read only memory)

 2.EPROM ( Electrically programmable read  only memory)

 3.EEPROm ELectrically  erasable  programmable  read only memory )

Flash memory 
Flash memory possesses the non-volatility of ROM memories while providing both read and write access .

However, the access times of flash memories are longer than the access times of RAM.

Flash memory is a memory storage device for computers and electronics.
It is most often used in devices like digital cameras, USB flash drives, and video games.
It is quite similar to EEPROM.
Flash memory is different from RAM because RAM is volatile (not permanent).
When power is turned off, RAM loses all its data. Flash can keep its data intact, with no power at all. A hard drive also is permanent (non-volatile) storage, but it is bulky and fragile.
Flash memory is much slower than RAM or hard drives.
But it is great for small electronics because it is small and it has no moving parts.

Examples of flash memory are pendrive.

BCA;103 COMPUTER FUNDAMENTALS NOV/DEC 2009 QUESTION PAPER

                                   I Semester B.C.A Examination Nov/Dec 2009
                                                          Y2K8 SCHEME
                                  BCA 103 : COMPUTER FUNDAMENTALS

TIME: 3HOURS                                                                                                 Max.Marks : 90

Instruction : Answer all the sections.

SECTION-A

NOTE; i) Answer any  ten questions
             ii) Each question carries two marks               10X2=20

1.what is memory ?

2.what is word length ?

BCA 501: SOFTWARE ENGINEERING NOV/DEC 2010 QUESTION PAPER

                             V SEMESTER B.C.A. EXAMINATION  NOV/DEC  2010
                                                               Y2K8  SCHEME
                                                       COMPUTER SCIENCE
                                          BCA 501  : SOFTWARE ENGINEERING


Time : 3Hours                                                                            Max.Marsk: 90

Instruction : Answer all sections

SECTION-A

Answer any ten questions.Each question carries two marks.

1.What is software engineering ? Mention the properties of software.

2. List the role of metrices.

3.Write any four differnt aspects that should be specified in an  SRS.

BCA 501 : SOFTWARE ENGINEERING OCT/NOV 2011 QUESTION PAPER

                             V SEMESTER B.C.A. EXAMINATION OCT/NOV  2011
                                                               Y2K8  SCHEME
                                                       COMPUTER SCIENCE
                                          BCA 501  : SOFTWARE ENGINEERING


Time : 3Hours                                                                            Max.Marsk: 90

Instruction : Answer all sections

SECTION-A

Answer  any ten questoins.Each question  carries two marks      10 X 2 = 20

1.Define software engineering.

2.Define system and subsystem.

3.Define Requirement  specification and  software specification.

BCA 504:SOFRWARE ENGINEERING NOV/DEC 2009 QUESTION PAPER

                     V SEMESTER B.C.A. EXAMINATION NOV/DEC 2009
                                                         Y2K7 SCHEME
                                                       COMPUTER SCIENCE
                                         BCA - 504  : SOFTWARE ENGINEERING


Time : 3Hours                                                                            Max.Marsk:80

Instruction : Answer all sections

SECTION-A

Answer any eight question.Each carries three marks   8 X 3 = 24

1.Explain problem analysis.

2.Define both verification and validation.

3.Discuss the maintenance of software.

BCA 501 : SOFTWARE ENGINERING NOV/DEC 2010 QUESTION PAPER

                             V Semester B.C.A .Degree Examination ,NOV/DEC 2010
                                                             Y2K8 SCHEME
                                                     COMPUTER SCIENCE
                                     BCA 501:SOFTWARE ENGINEERING

TIME:3HOURS                                                                                      Max.Marks : 90

SECTION-A

Answer any ten questions.Each question carries two marks.

1.what is software engineering ? Mention the properties of software.

2.List the role of metrices.

3.Write any four different aspects that should be specified in an SRS.

BCA-504:JAVA PROGRAMMING OCT/NOV 2012 JAVA PROGRAMMING

                    V Semester B.C.A.Degree  Examination,October/November 2012
                                                           Y2K8 SCHEME
                                                   COMPUTER SCIENCE
                                        BCA 504 : JAVA PROGRAMMING

TIME:3HOURS                                                                      Max.Marks:60

Instructions: Answer all the sections:

SECTION-A

Answer any ten questions:    10X1=10

1.How is JAVA bytecode different from other low-level computer languae coding?

2.What is meant by scope of a variable ?

3.what are the date typed used in JAVA ?

COMPUTER NETWORKING

Computer - Networking

A computer network is a system in which multiple computers are connected ,to share information and resources.

Characteristics

Share Resources from one computer to another

Create files and store them in one computer, access those files from the other
computer(s) connected over the network
Connect a printer , scanner, or a fax machine to one computer within the network and
let other computers of the network use the machines available over network.

Software

Software



Software is a set of programs, which is designed to perform a well defined function. A
program is a sequence of instructions written to solve a particular problem.

There are two types of software
*System Software
*Application Software

Computer Hardware

Computer - Hardware

Hardware represents the physical and tangible components of the computer i.e. the
components that can be seen and touched.

Examples of Hardware are following.

Input devices -- keyboard, mouse etc.

Output devices -- printer, monitor etc.

Secondary storage devices -- Hard disk, CD, DVD etc.

Internal components -- CPU, motherboard, RAM etc.

Computer Types

Computer - Types


Computer can be broadly classified by their speed and computing power.
 Types

1 PC (Personal
Computer)
Single user computer system.
Moderately powerful microprocessor.

2 WorkStation Single user computer system.
Similar to Personal Computer but have more powerful microprocessor.

3 Mini Computer Multi-user computer system.
Capable of supporting hundreds of users simulaneously.

4 Main Frame
Multi-user computer system.
Capable of supporting hundreds of users simulaneously.
Software technology is different from minicomputer.

5 Supercomputer An extremely fast computer which can perform hundreds
of millions of instructions per second.

Computer Generations

Computer Generations

Computer's hardware gradually change from time to time ,
The  journey of computer from beginning to present is displayed in the form of five generations:-

Following are the main five generations of computers
Genration & Description

1 First Generation
The period of first generation : 1946-1959. Vaccum tube based.

2 Second Generation
The period of second generation : 1959-1965. Transistor based.

3 Third Generation
The period of third generation : 1965-1971. Integrated Circuit based.

4 Fourth Generation
The period of fourth generation : 1971-1980. VLSI microprocessor based.

5 Fifth Generation
The period of fifth generation : 1980-onwards.ULSI microprocessor based

Computer - Applications

                                     Computer - Applications


Following list demonstrates the various applications of Computers in today's arena.

Business

The computer's characteristic as high speed of calculation, diligence,accuracy, reliability,
or versatility has made it an integerated part in all business organisations.
Computer used in business organisation

Computer applications used  in business organisation for:-

*Payroll Calculations

*Sales Analysis

*Financial forcasting

*Managing employees database

*Maintenance of stocks and sales

Characteristics of a computer

Characteristics of a computer

1.SPEED

  Computer is a very fast device.
  IT is capable of performing calculation of very big data.
  The computer has units of speed in microsecond .
  IT can perform millions of calculations in a few seconds

2.ACCURACY
  In addition to being very fast, computer are very accurate.
  The computer has performed calculations 100% error free.
  Computers perform all jobs with 100% accuracy.

3.STORAGE CAPABILITY
  Memory is a very important characteristic of computers.
  It can store large amount of data.
  It can store any type of data such as images, videos, text, audio and much more.

4.DILIGENCE
   Computer will never get tired
   Unlike human beings, a computer is free from monotony, tiredness and lack of
   concentration.
   It can work continuously without creating any error and boredom