Input/Output Technology Questions

PDF417 bar codes can hold around ____ of data.

1 KB

Up to ____ channels of MIDI data can be sent over the same serial transmission line.

16

A modern large format printer is a _____ printer that can print on wider-than normal rolls of paper.

inkjet

Digitizing tablets and tablet PCs are examples of ____________________, a general class of input devices.

input pads

A(n) ____ operates with an electrical charge and the attraction of ink to this charge.

laser printer

A ____ contains a matrix of liquid crystals sandwiched between two polarizing filter panels that block all light except light approaching from a specific angle.

liquid crystal display

____ sensors capture input from special-purpose symbols placed on paper or the flat surfaces of 3D objects.

mark and pattern

A(n) ____________________ scans for light or dark marks at specific locations on a page.

mark sensor

____ output is only able to generate one frequency (note) at a time.

monophonic

____ devices combine optical-scanning technology with a special-purpose processor or software to interpret bitmap content.

optical character recognition

A(n) ____ generates bitmap representations of printed images.

optical scanner

A(n) ____ is simply a table of colors.

palette

A(n) ____________________ matrix display shares transistors among rows and columns of pixels.

passive

Human speech consists of a series of sounds called ____, roughly corresponding to the sounds of each letter of the alphabet.

phonemes

Most current speech-recognition systems are ____, which means they must be "trained" to recognize the sounds of human speakers.

speaker dependent

____ is the process of recognizing and responding to the meaning embedded in spoken words, phrases, or sentences.

speech recognition

The ____________________ colors are cyan, magenta, and yellow.

subtractive

Modern ____ displays achieve high-quality color display with organic compounds.

LED

Components of a video controller include display generator circuitry, software stored in ROM, a video processor, and ____.

RAM

_____ technology etches display pixels and the transistors and traces that control/illuminate them onto a glass substrate.

TFT

A digital still camera captures and stores one image at a time.

True

A significant advantage of MIDI is its compact storage format.

True

An IDL can represent image components as embedded fonts, vectors, curves and shapes, and embedded bitmaps.

True

An advantage of optical over mechanical mice is a lack of moving parts that can be contaminated with dust and dirt.

True

Bar-code readers are typically used to track large numbers of inventory items, as in grocery store inventory and checkout, package tracking, warehouse inventory control, and zip code routing for postal mail.

True

Because plasma displays actively generate colored light near the display surface, they're brighter and have a wider viewing angle than LCDs.

True

Character and text recognition is most accurate when text is printed in a single font and style, with all text oriented in the same direction on the page.

True

For video display, a pixel displays no light or light of a specific color and intensity.

True

Image quality improves as dots per inch increases.

True

LCD displays have less contrast than other flat panel displays because color filters reduce the total amount of light passing through the front of the panel.

True

Most portable data capture devices combine a keyboard, mark or bar-code scanner, and wireless connection to a wired base station, cash register, or computer system.

True

OLED displays combine many of the best features of LCD and plasma displays.

True

On paper, pixel size corresponds to the smallest drop of ink that can be placed accurately on the page.

True

Phonemes sound similar when voiced repetitively by the same person.

True

Sound varies by frequency (pitch) and intensity (loudness).

True

A(n) ____ detects specific patterns of bars or boxes.

bar-code scanner

A stored set of numbers describing the content of all pixels in an image is called a(n) ____________________.

bitmap

Touch position sensing in a touch screen is usually based on ____.

capacitance

Written Western languages are based on systems of symbols called ____.

characters

A collection of characters of similar style and appearance is called a ____.

font

____________________ touchscreen input interprets a sequence of touch information as a single command.

gesture-based

____________________ dithering is usually called half-toning.

grayscale

Postscript is a(n) ____________________ designed mainly for printed documents, although it can also be used to generate video display outputs.

image description language (IDL)

____ is a standard for storing and transporting control information between computers and electronic musical instruments.

Musical Instrument Digital Interface

A(n) ____________________ matrix display uses one or more transistors for every pixel.

active

A(n) ____ display includes one or more transistors for every display pixel.

active matrix

A(n) ____ accepts a continuous electrical signal representing sound (such as microphone input), samples it at regular intervals, and outputs a stream of bits representing the samples.

analog-to-digital converter

A device that generates spoken messages based on text input is called a(n) ____________________.

audio response unit

A monochrome display can display black, white, and many shades of gray in between, so it requires 8 bits per pixel.

False

Color laser output uses four separate print generators.

False

Continuous speech is a series of nonstop interconnected phonemes.

False

Decades ago, printers adopted 1/32 of an inch as a standard pixel size.

False

Error rates of 1-2% are common using OCR software with mixed-font text and even higher with handwritten text.

False

For people and computers, a printed character must exactly match a specific pixel map to be recognizable.

False

For sound reproduction that sounds natural to people, frequencies between 20 Hz and 20 KHz must be sampled at least 96,000 times per second.

False

IDLs are a simple form of compression.

False

Image quality improves as pixel size increases.

False

Impact technology began with dot matrix printers.

False

Modern bar codes encode data in three dimensions.

False

Moving image quality improves as the number of frames per second (fps) decreases.

False

Phosphors emit colored light in liquid crystal displays.

False

Point size refers to characters' width.

False

Typically, digital cameras capture 14 to 20 fps.

False

Direct3D and ____________________ are widely-used video controller IDLs.

OpenGL

The number of distinct colors or gray shades that can be displayed is sometimes called the ____.

chromatic depth

____________________ is a series of phonemes interspersed with periods of silence.

continuous speech

Pointing devices can be used to enter drawings into a computer system or control the position of a(n) ____ on a display device.

cursor

A(n) ____ is a microprocessor specialized for processing continuous streams of audio or graphical data.

digital signal processor

A(n) ____ accepts a stream of bits representing sound samples and generating a continuous electrical signal that can be amplified and routed to a speaker.

digital-to-analog converter

____ is a process that generates color approximations by placing small dots of different colors in an interlocking pattern.

dithering

A(n) ____ printer moves a print head containing a matrix of pins over the paper.

dot matrix

In the United States, resolution is generally stated in ____.

dots per inch

Digital still cameras, video cameras, and Webcams use an array of ____________________ placed behind lenses to capture reflected and focused ambient light.

photosensors

As ____________________ size increases image quality improves.

pixel

Each cell in the matrix representing one part of a digital image is called a ____.

pixel

To an observer, the quality of a printed or displayed image increases as ____________________ size increases.

pixel

A(n) plasma display pixel excites gas into a(n) ____________________ state to generate UV light.

plasma

_____ displays use excited gas and phosphors to generate colored light.

plasma

Of all flat panel displays, ____________________ have the shortest operational lifetimes.

plasma displays

A ____ is a printer that generates line drawings on wide sheets or rolls of paper.

plotter

Font size is measured in units called ____________________.

points

The term ____________________ describes hardware that can generate multiple sound frequencies at the same time.

polyphonic

Human-assisted ____________________ procedures are required in many applications to deal with error rates of OCR technology.

quality control

Each transfer of a full screen of data from the display generator to the monitor is called a(n) ____________________.

refresh cycle

The number of refresh cycles per second is normally stated in hertz and called the ____.

refresh rate

The ____ of a display is the number of pixels displayed per linear measurement unit.

resolution

The process of converting analog sound waves to digital representation is called ____.

sampling

When keys are pressed, a keyboard controller generates output called a(n) ____________________.

scan code

Bar-code readers use ____that sweep a narrow beam back and forth across the bar code.

scanning lasers

OLED displays combine features from both LED and plasma display, including: ____.

thin, bright, and low power

A(n) mouse that can detect motion with ____________________ dimensions use an embedded gyroscope.

three

A(n) ____________________ is an LCD or LED display with additional TFT layers that detect the position of electrical field changes based on capacitance.

touchscreen

In graphics, a ____ is a line segment with a specific angle and length in relation to a point of origin.

vector

Video display panels are connected to a ____ that's connected to a port on the system bus or a dedicated video bus.

video controller