DCA : UNIT-2 COMPUTER HARDWARE AND OPERATING SYSTEM ( Chapter-3 Windows 7 Operating System)

 

                                                                            UNIT-2 

                                          COMPUTER HARDWARE AND OPERATING SYSTEM

                                                                       CHAPTER-3

                                               WINDOWS 7 OPERATING SYSTEM

                                               

1.Windows 7 is a _______operating system .

Ans: Graphical User Interface.

2. Windows 7 is a proprietary software of _________.

Ans: Microsoft.

3.------------------------ stories deleted files temporarily.

   Ans. Recycle Bin

4. Basic text editing program comes with Windows 7 is -------------.

  Ans. Word pad.

 5. Software comes with Windows 7 for simple calculation is ------------.

  Ans.  Calculator

6. Explain the different component of Windows 7 interface.

     1. The desktop

     2. The taskbar

      3. The start menu

      4. My computer

       5. Recycle Bin

       6. Windows Explorer

       Briefly explain the above topics in your own sentence.

                                         

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DCA: UNIT-2 COMPUTER HARDWARE AND OPERATING SYSTEM (Chapter-2 Disc Operating System)

   

                                                                     UNIT -2 

                                   COMPUTER HARDWARE AND OPERATING SYSTEM

                                                           CHAPTER- 2

                                              DISC OPERATING SYSTEM

    

1. MS DOS is a ------------------ operating system.

   Ans. Single user

2. Interface of MS DOS is ------------------ 

    Ans. Character user interface(CUI)

3. ----------------- command is used to display content of a file.

   Ans. TYPE.

4. ------------- command is used to create a directory.

   Ans. MKDIR/MD

5. ------------------ command is used to display a directory.

   Ans. DIR

6. -------------- command is used to display and set system time.

    Ans. TIME.

7. Explain the use of wildcard characters?

    A wildcard characters is a special symbol that stands for one or more characters. Many operating systems and applications support wildcard. In DOS, The asterisk(*) is a wild card stands for any combination of letters. The question mark(?) is a wild card characters that stands for any single character.

For example -c*.doc refers to all files that start with letter 'C' and having extension '.doc'.

F?C.txt refers to all files that starts with F, second letter may be any character and third character must be C with extension txt.

8. How can you execute MS DOS Command in Windows 7?

     We can execute DOS command in windows using cmd.exe

a. Click on start menu

b. type cmd.exe o  search programs and files.

c. press enter key.

     

   

 

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DCA: UNIT - 2 COMPUTER HARDWARE AND OPERATING SYSTEM (Chapter-1 Components Of A Personal Computer)

   

                                                                             UNIT-2

                                    COMPUTER HARDWARE AND OPERATING SYSTEM

                                                                       CHAPTER-1

                                          COMPONENTS OF A PERSONAL COMPUTER

       

1. What is the normal size of the hard disk available today?

    a. 1KB

    b. 1MB

    c. 1024 bytes

    d. 1TB

Ans. d

2. The device which supplies controlled voltage to various components in CPU is ------------------

   Ans. SMPS(Switched Mode Power Supply)

3. ------------ is a PCB that is used to connect all main components together inside CPU cabinet.

  Ans. Mother Board

4. Expand USB

    Ans. Universal serial Bus

5. System date is stored using memory?

     a. RAM

    b. Secondary Memory

    c. CMOS memory

    d. ROM

Ans. c

6. BIOS means

    Ans. Basic Input Output System .The routine instructions present in ROM which is executed at the initial stage of booting are generally called BIOS.

7. What is booting?

     When we switch on the computer a series of activity take place and operating system is loaded into memory (RAM).This process is called booting.

8. Explain any three types of expansion slots?

   1. Industry Standard Architecture(ISA) - Slowest type of bus.

   2. Personal Computer Interface(PCI) - Faster than ISA, supports  plug and play.

   3. Accelerated Graphics Plot (AGP) - Designed for video adapters.

9. Explain various components present inside CPU cabinet?

   

Brief description about above components. Ref Text.

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DCA: PAPER -1 INFORMATICS - Previous Year (2018 -May) Solved Questions

                                                                    PAPER -1

                                                                 INFRORMATICS

                                                    Previous Year (2018 - May) Solved Questions

                                          

                                                                   Section- 1

1. The arranged and meaningful form of data is known as -----------------

    Ans. Information.

2. One byte is -----------

  Ans. 8 bits.

3. ENIAC stands for  -------------

  Ans. Electronic Numerical Integrator and Computer.

4. The most common layout of a keyboard is ------------

  Ans. QWERTY

5. MICR stands for ----------------

    Ans. Magnetic Ink Character Recognition

6. In a ----------- operating system ,two or more users can use a computer at a time.

  Ans. Multi- user                                                                                                 (6*1=6 marks)

                                                                Section-11

7. what was the main component of third generation computer?

   a. Integrated Circuit Chips

   b. Vacuum tubes

   c. Transistors

    d. None of the above

    Ans. a

8. --------------------- is an example of output device.

  a. MICR

  b. Light pen

  c. Joystick 

   d. Monitor

Ans. d

9. Pick the odd one out

a. Windows

b. MS Office

c. UNIX

d. DOS

Ans. b

10. which one of the following is an example of secondary device?

  a. RAM

   b. ROM

  c. Hard disk

   d. register

Ans. c

11. -------------- is an example of single user operating system 

  a. Windows2012b

  b. UNIX

  c. GUI/Linux

  d. MS- Dos

  Ans. d                                                                                             (5*1=5 )

 

                                                             Section 111

12. What a register?

        Registers are temporary storage locations inside the CPU. The data and instruction fetched from the memory is to be stored in registers for the ongoing process.

13.  What is the function of input unit?

      1. Accept data and instruction from outside world.

     2. Convert human readable from of data to machine readable (digital) form .

      3. Supplies digital form of data to processor(CPU) for further processing.

14. Define data?

       Data is any fact connected with any object. For example, name of person(Tom),a number (it may be age, identification code or rank) etc.

15. Define computer program?

      Computer programming is a set of instructions to facilitate specific actions. Computer programmers create instructions for a computer to execute by writing and testing the code.

16. What is EEPROM's?

         Electrically Erasable Programmable ROM 

              The stored information can be altered by using electrical signal at register level rather than erasing all the information.

17. What is 4GL?

       Fourth generation of programming language(4GL). It can be used business application development. Examples of 4GL is SQL, Metafont, FOCUS etc.

18. What is an assembler?

         Assembler is a language processor ,that converts assembly language programs into            equivalent machine language programs.

19. List any four graphical input devices.

      Mouse, Joystick, Trackball, Track pad, Light pen

20. what is e-Governance?

     E-Governance is the delivery of government services and information to the public using electronic devices. For example www.kerala.gov in site act as e-governance website  Akshaya centres are promoting e-Governance.

21. Define m-Commerce?

     m-Commerce is the buying and selling of goods and services through wireless hand held devices such as cellular phone and personal digital assistants(PDA).                                    

                                                                                                                                          (10*2=20)

                                                                   Section IV

                                                            ( Answer any 9 questions)

22. Explain the characteristics of a computer?

     Speed - Computer is very fast device. Computers work at a very high speed and are much faster than humans.

        Accuracy - Since computer is programmed so what ever input we give it gives result with accurately.

       Versatality - We can use to perform completely different type of work at the same time.

       Diligence -Computer can work can work for hours or days continously without creating any errors and any break.

     Storage capacity (Power of remembering) - Every piece of information that a user stores on a computer can be retained as long as needed.

   No intelligence - Computer is an electronic machine and it has no intelligence. A computer can not take its own decision.

    No feeling/No emotion - Computer have no feelings or emotions. They have no feelings because they are machines.

23. How data is represented inside a computer?

       All the data and instructions are internally processed and stored in the form of 0 and 1 digits. These digits are called binary digits. (bits). The computer has switches to represent data and switches have only two states: ON and OFF. In binary digit ON is 1 and OFF is 0. In other words low voltage represented by the digit 0 and high voltage represented by the digit is 1.

24. Distinguish between sequential access devices and direct access devices?

           Sequential access devices : A magnetic tape is an example. Here the storage surface is organised into units of data called blocks. Data blocks are stored one after another in sequential manner on the tape ribbon.

Direct access devices : A magnetic disk is an example.We can access  any addressed storage block directly. The computer can  access any storage location on the surface of the disc directly using Read/Write Head.

25. Distinguish between RAM and ROM?

        

       26. What are the advantages and limitations of high level languages?

                   

27. Differentiate between compiler and Interpreter?

       Compiler : Compiler is a language processor ,that translates programs written in High level language    into Machine language. A compiler will take the entire source program file as input then translate it into machine language program and save it as object file.

Interpreter : An interpreter is an another type of language translator used to translate high level            language program into machine language program. It takes  one statement at a time as input ,translate it into machine code, which is immediately executed.

28. Explain different types of e- Commerce model?

       There are four traditional types of ecommerce, including B2C (Business-to-Consumer), B2B (Business-to-Business), C2C (Consumer-to-Consumer) and P2P(Peer -to Peer)

Business -to- Consumer : When commerce taking place between business and a consumer, it is called B2C. For example purchasing a book through internet.

Business -to -Business: When commerce taking place between business it is called B2B. For Example  companies doing business with each other such as manufacturers selling to distributors and wholesalers selling to retailers.

Consumer- to- Consumer : When commerce taking place between consumer and a consumer, it is called C2C.This model consists of person -to- person transaction  which enables customers to directly deal with each other.

Peer - to - Peer: This type of e-commerce when computer users share files online.

29. Write a short notes on malicious software?

        Malicious software ( Malware) includes computer viruses, worms trojan horses ,spyware, cookies and other malicious programs.

A computer virus is a program or piece of code that is loaded onto our computer without our knowledge and damage routine and normal working of our computer system. A worm is a special type of virus that can replicate itself and use memory. Trojan horse is a non-self- replicating type of malware program containing malicious code. A spyware is a software that monitors user activity on the internet and transmits that information in the background to someone else.

30. What are the application of computer in education?

          Now a days conventional classrooms of schools are totally  changed by modern smart classroom. A new category of teaching tools are emerged by using computers for learning CAVI(Computer Aided Video Instruction),Multimedia, CD ROMs, CAI, Presentation aids, internet ,distance education ,online education are some methods used by the computers in education.

    1. e- Learning: e-Learning or learning through computer technology helps the students to provide good and standardized education. Students can interact with the e-learning software, enjoy exiting colourful presentation etc.

2.  Virtual classrooms:  A virtual classroom is an online learning environment. It helps the students to get online education from  remote places. Just like a real world classroom, a student in a virtual classroom participates in synchronous instruction.

31. Briefly explain laser printer?

      Laser printers are non-impact type printers. They print one page at a time. These printers use laser beam to produce an image on a photosensitive drum. The image is  transfered  from drum to paper using toner. Toner is an electrically charged ink.

                                                                                                                                  (9*5=45)

 

                                                             Section V

                                                   ( Answer any 3 questions)

32. Explain computer generations?

 

33. Explain classification of computers according to their size and speed?

34. What is an output device? Explain any 3 output devices?

35. Distinguish between  system software and application software?

                                                                                                                              (3*8=24)

   

         

      

       

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DCA : PAPER - 1 INFORMATICS -Previous Year(2017 - June) Solved Questions.

 

                                                                        Paper - 1

                                                                       Informatics

                                                  Previous Year( June 2017) Solved Questions

                                                                   Section -1

1. ------------------------ introduced the concept of stored program.

  Ans.  Computer

2. USB stands for

     Ans. Universal Serial Bus.

3. -------------------- is an example for a company that manufacture microprocessor.

    Ans. Intel

4. Cache memory is placed between the processor and ---------------

    Ans. Primary memory

5. ------------ is an example of 4GL(4th Generation Programming Language).

   Ans. Database Query Language  eg. SQL

    others are Metafont,  Focus, Postscript etc

6. -------------------- is an example of volatile memory

   Ans. RAM(Random Access Memory)                                                               (6*1 =6 marks)

                                                       Section 11

7. Which of the following is an example for primary memory.

  a. RAM

  b. Optical Disk

   c. Hard disk

  d. Punched card 

   Ans. a

8. Which of the following is an example for sequential access drive.

  a. Floppy disk

 b.   Hard disk 

  c.  Zip disk

  d.  Pen drive

   Ans. all options are wrong

9. -------------------- is an example for an input device.

   a. Monitor

    b. Printer

     c. Plotter

      d. Touch Screen

Ans. d.

10. --------------- is an example for a system software.

  a. Excel

   b. GNU/Linux

   c. Microsoft office

    d. Open office

 Ans. b

11. In a single bit how many bits will be there?

   a. 8

   b. 16

    c. 4

    d. 32

  Ans. a                                                                                                  (5*1=5 marks)

                                                               Section 111

                                                           Answer all questions

12. List the features of 4th generation of computer?

      1. The fourth generation of computers have microprocessor - based system. It uses VLSI (Very                     Large Scale Integrated) circuits.

       2. Very reliable

        3. Heat generated is negligible.

         4. No air conditioner is required.

          5. Operation speed is pico seconds.

           6. Easy portable.

13. Why a microprocessor is needed in a computer?

           Microprocessor is the most important component in a computer. It is used to build a system which can perform multiple tasks. It is a programmable device that takes in input perform some arithmetic and logical operations over it and produce desired output.

14. What do you understand the term Hyper threading?

          Hyper threading is a technology used by some Intel microprocessors that allows a single microprocessor to act like two separate processors to the operating system and the application programs that use it.

15. Write about EEPROM?

      Electrically Erasable Programmable ROM 

              The stored information can be altered by using electrical signal at register level rather than erasing all the information.

16. List the different magnetic storage devices?

         Hard disks, Floppy disks,  Magnetic tape

17. Write the characteristics of a monitor?

Size.

Resolution.

Bandwidth

.
Refresh rate.

Interlaced or non – interlaced.

Dot pitch.

18. What do you understand by the term  Kernal  of an operating system?

 

           The kernel is a computer program at the core of a computer's operating system that has complete control over everything in the system.

19. Write examples of virus(any two)

   Ans. File virus ,Boot sector virus, Macro virus.

20. write about software piracy?

       When you are copying a software product without the legal permission of its creator this act is known as software piracy.

21. What is a computer?

       Computer is an electronic programmable data processing machine. It can store ,process and retrieve data as and when desired.

                                                                                                                                     (10*2= 20 marks)

                                                  Section 1V

                                             Answer any 9 questions

22. Explain the different classification of computer based on size.

              Computers can be classified by their size ,speed , storage capacity and application domain. They are

 

     Micro computers ,Mini computers ,Main frame computers and Super computers.

 (Ref text and study Brief description about all)

 23.List the different types of Micro computers.

 

    Different types of Micro computers are Desktop computers, Laptops ,Palm tops.

Desktop Computers:  The desktop computers are also known as PCs are the most common type of micro computers intended for personal and office use of an individual.

Laptops : A laptop is a portable micro computer that a user can carry around. They are small computers including all the features of a normal personal computer. The advantages are light weight and flat.

Palm tops : The palm top computers are essentially small portable computers and its weight and size are suitable to handle it on our palm.

  

24. Write the function of motherboard?

         Motherboard holds many of the crucial electronic components of the system such as CPU ,memory and provides connectors for other peripherals .It also includes sound card ,video cards network cards etc.  It can be considered as the backbone of a computer.

25. How can we differentiate two microprocessors? 

 

             Question is not correct

  

26. Write down the characteristics of Secondary Memory.

           Overcome the limitations of primary memory ,the secondary storage devices are introduced.

Secondary storage devices are low cost ,large storage capacity and data stored are permanent in nature. 

 

 27. List and explain the different types of RAM?

      SRAM and DRAM are two different types of RAM.

 

   SRAM (Static RAM) : Binary bits are stored using traditional transistor flip flop.Here the bits are represented by voltages. They are fast but costly.

DRAM(Dynamic RAM) : information is stored in the form of charges on a capacitor. Because capacitors have a natural tendency to discharge, its contents must be periodically refreshed. they are small in size ,less cost ,slow and consumes less power than SRAM. Available variations of DRAMs

Synchronous dynamic random access memory (SDRAM), Double Data Rate - SDRAM(DDRAM)

and RDRAM (Rambus Dynamic Random Access Memory)

28. Explain the different pointing devices?

            Mouse ,Optical mouse ,Trackball, Track pad ,Track point and Joystick are the different types of pointing devices.

Mouse : Mouse is the most popular pointing devices. It is a small hand held device that fits comfortably in user's palm.

Optical mouse : An optical mouse is an advanced computer pointing device that uses a light -emitting   diode(LED) and optical sensor.

Trackball : A trackball is a cursor control device used in many notebook and laptop computers. The trackball is usually located in front of the keyboard towards the user.

Track Pad : It is one of the latest pointing devices. It looks like a small ,gray window about two inches wide.

Track point : This device is also called an eraser pointer because it resembles the shape of a pencil eraser.

Joystick : It is used to move the cursor position on screen. Its function is similar to that of a mouse.

 

 29. What do you understand by language translator? List and explain different types of translators?

            The software which translate programs written in one language to another language is generally known as Language processors.

                  Assembler ,Compiler and Interpreter are types of translators.

 

Assembler : Assembler is a language processor ,that converts assembly language programs into            equivalent machine language programs.

Compiler : Compiler is a language processor ,that translates programs written in High level language    into Machine language.

Interpreter : An interpreter is an another type of language translator used to translate high level            language program into machine language program.

30. List the different freedom offered by free software?

        1. The freedom to use the program ,for any purpose and any where.

         2. The freedom to study how the program works ,and modify it as you wish.

       

          3. The freedom to redistribute copies so you can help your friends.

           4. The freedom to distribute  copies of your modified versions to others.

31. Explain the different application of IT?

     Business ,Medicine and Healthcare ,Entertainment, E- Governance ,Education, Engineering Manufacturing ,Science and IT policy.

(Ref text book and Brief study about  the topics)                                   (9*5= 45marks)

                                                                 Section v

                                                     Answer any 3 questions

32. List and explain  the different characteristics of a computer

33.  With a neat block diagram explain the organization of a computer.

34. Explain the different types of operating system.

35. List and explain the different types of E- commerce.                         (3*8 =24)               

    

       

  

      

   

       

            

        

            

             

    

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