CLASS 9TH

CHAPTER 2

 Keyboard and Keyboard Skills

* QWERTY - 104 Keys

Latin based alphabet -Kweehr-tee.

* Touch typing

Keys of Keyboard

*Alphanumeric Keys -26 alphabet . they are not present in alphabetical order, instead they are placed in such a manner so that a user can work fast.

*Numeric Keypad - -0 to 9, Arithmetic operators, 

Directional Keys, NUM lock, Insert, Delete, Enter, and the decimal point. 

In the right side of keyboard we can use numbers for entering fast.

Keypad is just like simple calculator. numeric keys works in dual mode. NUM lock is provided to switch between the two modes.  

When NUM lock is on, you can use numbers on the keypad. When NUM lock is off, the alternative functions can be used. Usually in keyboard of laptops do not have numeric keypad.

*Punctuations/ Special Keys: Punctuations such as comma, period ., semicolon; bracklets([]), parenthesis{}, and so on. Mathematical operator such as +, -,= etc.,

* Function Keys: These Keys are used to perform specific task. These keys are present in top row of the keyboard. Labelled as F1 to F12. 

* Special Keys : Enter /Space bar, ESC, Printscreen, Pause /Break, Insert, Tab, Delete, Windows and Menu are some special keys.

*Navigation Keys: It is used to navigate through the document. Arrow keys, Home , Pg up, Pgdown, End Keys.

*Combination keys : Combine with other keys to perform action. Eg: Ctrl, Alt, shift.

*Toggle Keys : on /off. Eg  Caps Lock, Num Lock, and Scroll Lock Keys

toggle key ----Led Indicator on the keyboard

*Home Row Keys: left side A S D F.

                               Right side hand  : L K J

*Guide Keys

F J  are guide keys, Small raised tangible mark will be present.

* Positioning of fingers on the keyboard

*Typing and deleting text:

    place cursor where you want to type.

    press the letters on the keyboard.

    use space bar to separate the words.

* Deleting text

 place cursor just after the letter, press backspace key.

place cursor just before the letter, press delete key.

* Typing capital letter

*Typing numbers -numlock

*Typing symbols -  shift + numeric key -  *.

*Typing sentences / Paragraph. - space / tab

* Rules to learn typing

*Pointing Devices: Used to point an object on the screen. 

Point

Select

Open 

Drag

Devices used for pointing *

* Mouse - input and pointing device.

*Mouse Pointer - 

Types of mouse 

1.Mechanical mouse

2. Opto Mechanical Mouse.

3. Optical mouse.

Common Mouse Clicking.

CW

1. What are Home Row keys?

The Home Row keys are the row of keys of the computer keyboard your fingers rest on when not typing.

eg: asdf left hand, ;lkj right hand.

2. Why it is important to maintain a proper posture while working on a computer?

Maintain the correct posture as the typing posture minimises both static and dynamic muscle loads.

Correct position  help you avoid health complications.

3. What is a pointing device? What it is used for?

It is an input device used to point at an object on the computer screen.

It is used to draw and play games on the computer.

4. What is difference between a mechanical mouse and an optical mouse?

The Mechanical Mouse has rolling rubber ball under the case of mouse. 

The Optical Mouse does not have a ball.

Touch Typing

    *It is a method of typing without the use of sense of sight, or simply by feeling the keyboard.

    *Typing method utilizes muscle memory through rigorous training.

Benefits of Touch Typing:

Speed: 

Accuracy:

Time:

Focus:

Requirements of Touch typing:

Hardware:

OS:

Application Software: RapidTyping Software 5.2.

Rapid Typing Software: Refer book.

Start Rapid Typing Software in different OS.

Getting familiar with rapid typing software:

For next topics refer book with the pictures and study.

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Chapter 3

Q&A

1). What is a touch typist?

Answer – A touch typist is someone who types without looking at the keyboard. Muscle memory helps the user remember where the keys are available. Touch typists position their fingers in the center of the row and know which finger to move and how much to move it in order to reach any key.

2). Home Key – Home keys for the left hand are ASDF, and home keys for the right hand are (semi-colon) LKJ.

 

3). Mention any two advantages of touch typing.

Speed: The touch typing skill is the significant increase in speed and efficiency. Time: Another benefit of touch typing is accomplishing the work within a given time frame.

 

4). What is computer ergonomics?

Computer ergonomics is the science of refining the design of products to optimise the workspace “fit” between each worker and his or her work environment. This helps in increasing performance and reducing the risk of strain injuries.

 

5). What is the difference between gross typing speed and net typing speed?

• Gross, or Raw speed is a calculation of exactly how fast you type with no error penalties. The Gross typing speed is calculated by taking all words typed and dividing it by the time it took to type the words.
• Net speed is a calculation of exactly how fast you can type error-free. It is arguably the most useful tool in gauging typing abilities. Since errors play a part in its calculation, it is more a measure of typing productivity than of just typing speed

6). Define typing accuracy with an example.

Accuracy in typing means that you type the words accurately and correctly. Typing accuracy is defined as the percentage of correct entries out of the total entries typed. So, if you typed 90 out of 100 characters correctly, you typed with 90% accuracy.

 

 

7). WHICH KEY IS USED TO DELETE THE TEXXT? HOW THEY ARE USED?

 

Both the Del or Delete key and Backspace key can delete text. However, when dealing with text, pressing the Del key deletes text to the right of the cursor. Pressing the Backspace key deletes text to the left (backwards) of the cursor.

 

8). FOUR COMMON MOUSE ACTIONS

Action	Definition
Click-and-hold	Press and do not release the left mouse button.
Left-click	Same as click. Left-click clarifies the action when there might be confusion with right-click.
Middle-click	Press and release the middle mouse button, without moving the mouse.
9).   WHAT DO YOU UNDERSTAND BY COMBINATION KEYS.? A key combination is the use of two or more keys on a keyboard to generate a specific result. These keys are pressed at the same time, or one after the other while holding down each of the previous keys. 10). . What is the importance of maintaining rhythm in timing? Answer: In the touch typing technique, the typing rhythm is very important. Typing rhythm means the keystrokes should come at equal intervals. To control the constant typing speed, the slow down indicator is used.     11). Which operating system support rapid typing software? Windows ,linux, mac, unix are the major operating system that supports the rapid typing software