NOTES: COMPUTER-3 QUICK WAY

CLASS:3 SUB:COMPUTER

CHAPTER:1 RECAP PAGE:8,9

  • FILL THE BLANK SPACES WITH CORRECT WORDS.

 

i)                 Machine is a ———————————————————-tool made by—————————————————————————–
ii)              —————————————————–is plain in shape and very easy to use.
iii)            Automatic machine is driven by some——————————-
iv)            Examples of manual machines are—————————————————–and—————————————–
v)               —————————————————————computer is easy to use than other types of computers.
vi)            ———————————————–and———————————are the basic parts of a computer system.
ANSWERS:(i-useful+man)(ii-simple machine)   (iii-power)(iv-boat+bicyle)(v- personal )       (vi-hardware+software )

 

(2)MARK (X) AGAINST EACH WRONG STATEMENT

 

i) Computer is an automatic machine.
ii)We use manual machines with our muscular power.
iii) Scanner is an output device.
iv) Speaker is an input device.
v) Another popular name of CPU is Microprocessor.
vi) Computer memory is measured by Bytes.

ANSWERS: (i- T) (ii-T ) (iii-F )       (iv- F)             (v-T )       (vi-T )

  • GIVE THE SHORT ANSWERS OF THE FOLLOWING QUESTIONS;
i)                   How many types of machines are there? Write down their names.
ANSWER:

There are types of machines;

1-                Simple Machine

2-                Manual Machine

3-                Automatic Machine

ii)                What is a computer?
ANSWER:

COMPUTER:

Computer is an electronic machine.

It converts raw data into meaningful information.

iii)              What is a CPU?
ANSWER:

                 CPU: (Central Processing Unit)

It is the place where data is to be processed.          

iv)              What is hardware and software?
ANSWER:

Hardware and software are two basic parts of a compute

v)                What are output devices? Write down their names.
ANSWER:

               Output devices are parts of a computer. It is used to get information from computer.

 

CHAPTER:2 COMPUTER APPLICATIONS PAGE:15

  1. TICK THE CORRECT ANSWER.
  2. In schools and colleges computer may be used to help the process of teaching.
  3. Banks are not the big organization to use the computer.
  • Computer helps the doctor to diagnose diseases.
  1. Computer cannot help us to get a seat reserved in plain and train.
  2. Computers have played very important role the history of communication.
  3. FILL THE BLANK SPACES WITH CORRECT WORDS.
  4. Traffic department uses computer for ……………………………………………………….

ii)With the help of computer we can get better ——————–of our car engine.

  1. —————————-use computers to prepare correct drawings of machines, tools, vehicles, buildings and roads.
  • ………………………………………are used to send massages, photographs, pictures and live coverage of important events anywhere.
  1. ………………………………………………………computers are used during travelling.

 

Answers:

(i- Traffic control) (ii-maintenance) (iii-Engineers)     (iv-Satellites ) (v- Portable)

 

CHAPTER:3 KEYBOARD SKILLS PAGE:23

  1. FILL THE BLANK SPACES WITH CORRECT WORDS:
  2. Keyboard is an———————————————————– device.
  3. The function Keys are on the—————————————— of a Keyboard.
  • Typewriter Area contains —————————– Keys , —————————————- Keys , ———————————- Keys and some —————————- Keys.
  1. Numeric Keypad has—————————————————– Keys.
  2. Page Up and Page Down Keys are the part of —————————— Keys.
Answers:(i-in put) (ii-top ) (iii-4, Alphabetic, Numeric, Special function )   (iv- 14 ) (v- Cursor Control )
  1. Which key shall we press for the following action?
  2. Move the cursor upwards several lines at a time————————-
  3. Move the cursor to the top of the document——————————
  • Move the cursor to the end of the document—————————–
  1. To erase a typed letter———————————————————–
Answers: (i- Page Up) (ii- Home ) (iii- End )   (iv- delete key)
  1. HOW MANY OF THESE KEYS ARE THERE IN A KEYBOARD?
  2. Alphabetic Keys———————————–
  3. Numeric Keys—————————————
  • Symbol Keys—————————————–
  1. Special Function Keys——————————-
Answers: (i-26)         (ii-14 )     (iii-21 )         (iv-11 )

 

  1. WRITE DOWN THE ANSWERS OF THE FOLLOWING QUESTIONS.
i)                   Write the names of four groups of keys on the keyboard?
ANSWER:

1-                Cursor control keys

2-                Function keys

3-                Type writer area

4-                Numeric keys

ii) What are the function keys? What are they used for?
ANSWER:

Function keys are on the top of keyboard. They are multipurpose keys.

iii)What are the Cursor Control Keys?
ANSWER:

Cursor Control Keys are used to move cursor in up, down, right and left sides.

iv)What is the function of Numeric Keys in the keyboard?
ANSWER:

Numeric Keys are used to calculate the sums.

v)What is the function of Insert Keys in the keyboard?
ANSWER:

                 Insert Keys are used to write a word. It squeezes the letters.

 

 

 

CHAPTER:4 INPUT DEVICES PAGE:27

  1. Fill the blank spaces with correct words.

 

i)           The devices, which are used to give input to the system unit an called———————————————————————————————–
ii) Joystick is used to   ———————————————————————–
iii) Lightpen is used for —————————————————————–
iv) Keyboard is same as————————————- with some additional keys.
v) Mouse is used when working with programs like —————————————————————————————————————————————
vi) Two major types of Scanners are

(i)                —————————————————————————————–

(ii)             —————————————————————————————–

                                                                         vii) A Digital Camera is an ————————————————–device.

 

 

Answers:   (i-input devices) (ii- play games ) (iii- designing) (iv-type writer )

(v- windows)   (vi- hand held, flat bed ) (vii- input )

  1. Tick the correct statement.

 

i) Mouse is an output device.  
ii) Hand held scanner is found in libraries and general stores.
iii) Flatbed scanners are not used to store text or graphics in the computer.
iv) Lightpen is a pointing device.
v) Earlier keyboard had used with less than 60 keys.

 

Answers:   (i-F)         (ii- T)         (iii-F )         (iv-F )       (v-T )

 

 

CHAPTER:5 INSIDE SYSYEM UNIT

PAGE:35

  • Fill the blank spaces with correct words:

 

  1. System Unit is a ……………………………. Shaped part of a computer.
  2. CPU stands for …………………………………………
  • Memory Unit is the temporary ………………………… for data.
  1. Computer has…………………………… types of memory.
  2. ROM stands for ………………………………….

Answers:(i- box) (ii-Central Processor Unit)(iii-store)(iv-two)(v-Read Only Memory)

 

  • Tick the right statement:
  • System Unit performs a vital role to get output from input.
  • CPU is the brain of a computer.
  • There are three main types of computer memory devices.
  • RAM stands for Random Access Memory.
  • When a computer is turned off the information or data present in RAM is not deleted.
  • ROM stands for Random Only Memory.
  • We can easily change the information stored in ROM.
  • External memory devices are also called Secondary Storage Devices.
  • We may read and write the data on the hard disk as many times
    as we require.
  • Floppy diskettes are available in three sizes.
  • CD-ROM stands for Compact Disk, Read Only Memory.

Answers: (1-T ) (2- T)   (3-F )   (4-T )   (5-F )    (6-F )   (7- F)   (8-T)   (9- T)         (10-F ) (11-T )

  • Give the short answer of the following questions:

 

Write a short note on the importance of a system unit?

 

ANSWER:

System Unit is a box-shaped part of a computer. It consists of CPU, Memory, Main Board, VGA Card, Sound Card etc. It performs a vital role to get output from input.

 

i)            Write the names of three main parts of a CPU?

 

ANSWER:

CPU (Central Processing Unit) has three major parts;

(l)CU

(2)ALU

(3)MU

 

ii)           Write a short note on CD-ROM?

 

ANSWER:

All the electronic components are mounted on a piece of fibre glass. It is called the Main Board.

 

iii)         How many types of memories are there in a computer? Write

their names?

 

ANSWER:

There are two main types of computer memory.

(1) Internal Memory

(2) External Memory

 

iv)         Write a short note on CD-ROM?

 

ANSWER:

CD-ROM (Compact Disk, Read Only Memory):

It can read and data and programs stored in disks. It can store a lot of information.

 

v)          Write the names of three basic steps involved in processing the

information through computer?

 

ANSWER:

Following three basic steps are involved in processing the information through computer;

1-Input

2-Processing

3- Output

 

vi)         Write a short note on the importance of Hard Disk in the computer?

 

ANSWER:

Most computers have a permanent storage inside the system Unit of a computer. It is called Hard Disk. It has a very large storage capacity.

We can read and write the data on the hard disk as many time as we require. Data of hard disk can be deleted or changed. It is used to store data of long time.

 

 

CHAPTER:6 OUT PUT DEVICES

PAGE:42 ,43

  • Choose the correct answer from the giving options ans write down in the blank spaces;

 

i)            The output can be given on a __________________.

(a) Monitor             (b) Notebook                    (c) Mouse

ii)           Monitors looks like a ________________.

(a)Floppy Dick        (b)Printer                            (c) Television

iii)         Monitor are of ___________________.

(a)One type            (b) Two type                        (c)Three type

iv)         The output,     we see on the monitor is called __________________.

(a)Hard copy          (b) Soft copy                        (c)Printout

v)          Colour monitors are of _________________.

(a) Two type            (b) Three type                   (c) Four type

vi)         Printer receives the signal from a _________________.

(a) Keyboard           (b)Monitor                          (c) System Unit

vii)       The best resolution is given by a ________________.

(a) Dot matrix printer(b) Laser printer             (c) Inkjet printer

viii)     The printout given by a printer is called……………………………..

(a)soft copy               (b)software                        (c) Hard copy

ix)         A type of output device that produces sound from a computer is called………………….

(a)Printer                  (b) Monitor                         (c) Speaker

  • Tick the correct answers:
  1. Pictures cannot be so clearly seen on a colour monitor.
  2. Laser Printer gives best quality printout at a faster speed.
  • CGA stands for Central Graphic Adapter.
  1. EGA stands for Enhanced Graphic Adapter
  2. VGA stands for Video Graphic Adapter.
  3. SVGA stands for Super Video Graphics Adapter.

Answers: (i-F )           (ii-T )            (iii-F )           (iv-T )          (v-T )              (vi-T )

  • Give short answer of the following questions.

 

i)            Write a short note on the importance of a Monitor.

 

Answer:

           Monitor is an output device. We can see all kinds of information on the monitor.

For example, words, pictures, numbers and cartoons etc.

 

ii)           How many types does a Monitor have?

 

Answer:

There are two types of Monitor;

1-Monochrome Monitor

2-Colour Monitor.

 

iii)         How many types does a Colour Monitor have?

 

Answer:

There are some types of Colour Monitor given;

1-CGA (Colour Graphic Adapter) 4 colours

2-EGA(Enhanced Graphic Adapter) 16 colours

3-VGA(Video Graphic Adapter) 256 colours

4-SVGA(Super Video Graphic Adapter) 256 or more colours

 

iv)         What is a Printer?

 

Answer:

Printer is commonly used output device. We can print whatever we see on the screen of computer.

 

v)          How does a Dot matrix printer print on a paper?

 

Answer:

There is a ribbon of ink between paper and head. The head of the printer moves on paper.” It prints through the ribbon on the paper. After completing one line, the motor moves the paper one line up.

The upper part of the head contains 7 to 24 pins. The head strikes the ribbon 100/second. So, it prints in small dots.

 

vi)         What is the purpose of Speaker in a computer?

 

Answer:

Speaker is an output device. It is used to produce the sounds of the programs. It also allows us to hear the sounds of video games and multimedia programs.

 

 

CHAPTER:7 MICROSOFT WINDOWS

PAGE:50,51

  • FILL IN THE BLANK SPACES WITH CORRECT WORDS;

 

  1. The most popular operating system for personal computer is ………………………………
  2. The background of screen is called…………………………………
  • We can open any program clicking on its…………………………
  1. ………………………………. Shows program currently running.

 

  1. Pressing and quickly releasing a mouse button is called………………………….

Answers:

  • micro soft windows)   (ii-wallpaper)    (iii-icon)      (iv-Taskbar)                (v-Double Clicking)

 

 

 

 

  • Give the answer of the following questions in a short form;

 

i)            What is Start Button?

 

Answer:

Start Button is on the right corner on the task bar.

To start a program, Open a document, Change system setting, get help etc. Start Button is used.

 

ii)           What is Dragging?

 

Answer:

To move icons, windows’ and other things around the screen, point and press the mouse. Then move the mouse to desired position. Releasing the mouse completes the process.

 

iii)         Define Run Command in Windows?

 

Answer:

Run Command lets to run a program directly. If you know the path and file name you can run that program.

 

iv)         How can we Shut Down the computer?

 

Answer:

Click on ‘Start Button’ on the task bar.

Select ‘Shut Down’ from the dialogue box(stand by, Shut Down,

Restart)

Press OK or “Enter”

 

v)          Explain Find Command in Windows?

 

Answer:

Find Command is used to find a file or a folder in the computer.

 

 

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