4.1.4 Practice Questions Peripheral Devices

Explanation

A digitizer captures some type of analogue signal and converts it into digital data. For example, graphics tablets capture analogue stylus strokes written on a pad and convert them to digital data. These are mostly used by graphic artists to capture hand-drawn images. Smart card readers are used as an authentication method. A smart card, which contains an embedded microchip. is inserted into the reader. The reader then scans the chip, verifies its contents, and authenticates the user. Smart card readers can be stand alone devices or integrated with other peripherals (e.g., a keyboard). Biometric scanners are used as a form of authentication. They are able to scan users' unique physical features and use them to verify their identity. Common physical features used by biometric scanners include: Retina Fingerprint Face Heart beat A barcode reader is a device that can scan barcodes. Barcodes are most commonly used in retail environments at checkout stands. Shipping companies, hospitals, and other organizations use barcodes to track or inventory items.

Which of the following devices would you you add to a computer if you needed to take inventory at a retails store by scanning the UPC symbols on products?

Bar code reader Explanation Installing a bar code reader will allow you to take inventory at a retail store by scanning the UPC symbols on products. A scanner is used to scan documents. A touch screen is an interactive monitor for a computer. A trackball is a type of mouse.

Most commonly used in retail environments at checkout stands.

Barcode reader

Fingerprint scanner

Biometric scanner

Used to scan users unique physical features and use them to verify their identity.

Biometric scanner.

Graphics tablets mostly used by graphic artists to capture hand-drawn images.

Digitizer

Used to capture some type of analogue signal and convert it into digital data.

Digitizer

You have three computers in your office. You would like to reduce the time it takes to move from one computer to the next, and you would like to use only one keyboard, one monitor, and one mouse for all three computers. Which device will allow this type of setup?

KVM Explanation A KVM (keyboard, video, mouse) switch would allow you to control all three computers with one keyboard, one monitor, and one mouse. The KVM switch has multiple input groups, with each group accepting keyboard, video, and and mouse connections from a single computer. A single out group connects to the shared input/output devices. Buttons on the KVM switch or keyboard shortcut combinations allow you to toggle the input/output devices between computers. A USB hub allows multiple USB-compatible devices (up to 127) to be connected to a single USB connection,but the hub does not connect to or control multiple PCs. A router is a networking device which connects multiple networks. DVI is a standard for connectors digital video cards.

Can be stand-alone devices or integrated with other peripherals, such as a keyboard.

Smart card reader

Used to scan hardware which contains an embedded microchip for authentication.

Smart card reader

Which of the following is considered an input devices?

Touchscreen Explanation A touchscreen is considered an input device. A touchscreen is a monitor that can receive input through touch. A hard disk is a magnetic storage device used to store computer data. RAM is the most common type of memory found in computers and other devices such as printers. A computer monitor is an output device that consists of the multiple components that make up a computer's display system.

What type of peripheral device is typically found on a notebook computer and allows the user to control the cursor with a finger?

Touch pad Explanation Touch pads are typically found on notebook computers and are used in place of a mouse. Users slide their finger on the touch pad to manipulate the cursor. Motion sensors are devices that are able to detect the slightest amount of movement in an area. They are typically used with security systems and require special software and configuration. Gamepads are handheld controllers with directional controls on the left and buttons on the right. Scanners are used to scan hard-copy images and documents and convert them inot digital input for the PC. A mouse is a hand-held device used to manipulate the cursor.