10
Comprehension:
Read the given passage and answer the questions that follow.
An input device of a computer is hardware that allows the user to provide data, information or control instructions for interaction, processing, and control. Data is entered into a computer in raw format, converted into an understandable language by input devices and processed by the CPU to produce an output. Input devices are also called peripheral devices. There are different categories of input devices. They are pointing, keyboard, speech, or voice, draw and recognition devices. The keyboard is a primary input device used to enter data and commands in a computer system. A normal keyboard has alphabetic keys, function keys, number keys, arrow keys and control keys. Most of the keyboards comes in different sizes – 84 keys or 101/102 or 108 keys. Most of the keyboards have a QWERTY layout. The mouse is the most common and popular input device, which uses a point-and-click operation. In general, the mouse has left and right buttons and some may have a middle roller key button also. A modern mouse uses optical technology (laser) to control or track the movement of the cursor. Joysticks are widely used input devices for playing games on computer. It can also be used as a pointing device like a mouse. The touchpad, also known as a trackpad, is an input device and is integrated into a laptop. It is a point device like a surface to detect movements of fingers and move the pointer accordingly. It is a common alternative to the mouse. The microphone is a voice input device that allows users to input voice into a computer system. Mics read sounds from one’s surrounding and convert analog sound waves to electrical signals. These are further converted to digital form and stored on a computer. Other input devices include light pen, digital camera, webcam, MICR, OCR, stylus, graphic tablet, etc.
A computer mouse will have a minimum of how many buttons?
