Chapter 6

A dedicated, mobile device for storing and displaying e-books and other electronic media including electronic newspapers and magazines.

E-book reader

A keyboard key, like Caps Lock, that turns a feature on or off is called a _______ key.

toggle

Bar code readers use _______ embedded in them to read bar codes.

photoelectric cells

Keyboards that are widely used on various smartphones and other small portable devices, and which are designed primarily for communicating via texting and connecting to the Web.

Thumb

OMR, OCR, and MICR are all types of _______.

character and mark recognition devices

Printers connected to the Internet that provide printing services to others on the Internet are called _______.

cloud printers

Specialized devices with a large display connected to a computer projector and are widely used in classrooms and corporate boardrooms.

Digital or interactive whiteboards

The arrangement of keys on a keyboard, QWERTY reflects the keyboard layout by _______.

taking the letters of the first six alphabetic characters found on the top row of keys

The distance between each pixel.

Dot pitch

The most widely used audio-input device is the _______.

microphone

The most widely used audio-output devices.

speakers and headsets

The proportional relationship between a display’s width and height.

Aspect ratio

The series of dots that form the image on a monitor are called _______.

pixels

The size, or _______, is measured by the diagonal length of a monitor’s viewing area.

active display area

The study of human factors related to things people use.

Ergonomics

These screens can be touched with more than one finger, which allows for interactions such as rotating graphical objects on the screen with your hand or zooming in and out by pinching and stretching your fingers.

Multitouch

This indicates the monitor’s ability to display colors by comparing the light intensity of the brightest white to the darkest black.

Contrast ratio

This reading device is used in banks to read the numbers on the bottom of checks and deposit slips.

MICR

This type of mouse emits and senses light to detect mouse movement.

Optical

Two categories of laser printers are _______.

personal and shared

Type of keyboard that uses a touch screen as the input device.

Virtual

What kind of specialized monitor is especially useful for graphic artists, designers, and publishers?

High-definition television (HDTV)

Which of the following allows the transmission of telephone calls over computer networks?

Voice over IP

Which of the following is not a type of scanning device?

Stylus

Which of the following printer features enables you to print on both sides of a sheet of paper?

Duplex

Which of the following statements is incorrect?

Printer speed is measured in the number of words printed per minute.

Which of the following types of character recognition systems is used for standardized multiple-choice testing?

OMR

_______ is any data or instructions that are used by a computer.

Input

_______-input devices convert sounds into a form that can be processed by the system unit.

Audio

<b>Interactive device</b>

Device with an input and output process.

<b>User interface</b> (UI)

The means by which a user can control a software application or hardware device.

<b>Graphical user interface</b> (GUI)

Allows user to interact with software applications through graphical icons.

<b>Textual user interface</b> (TUI)

Allows user to interact with software applications through command-line interfaces.

<b>Operating system</b>

The software that controls all of the computer’s hardware. Acts as interface between user and hardware and between applications and hardware.

Program verification

Checking whether you are building the program correctly.

Program validation

Checking whether you are building the correct program.

Data verification

Checking data for accuracy and inconsistencies.

Double entry

Entering data twice and checking by comparing the two copies (data verification).

Proofreading data

Checking the data entered against the original document (data verification).

Data validation

Automatic computer check to ensure that the data entered is sensible and reasonable.

Batch totals check

Checks for missing records (data validation).

Cardinality check

Checks that the record has a valid number of related records (data validation).

Check digit

Checking if the last one or two digits of the code are correct (data validation).

Consistency check

Checks that data in fields corresponds, e.g. if Title = ‘Mr’ then Gender = ‘M’ (data validation).

Presence check

Checks if data has been entered into a field (data validation).

Lookup table

Checks for acceptable values in a table or array (data validation).

Format check

Checks that data is in specified format (data validation).

Length check

Checks that data is of correct length (data validation).

Range check

Checks that a value is within a specified range (data validation).

Spell check

Looks up words in dictionary/array to check if data is spelt correctly (data validation).

Data <b>persistence</b>

Ability of a program to save data and return to it and reload it when it is run.

Text file

File structured as a sequence of lines. Each line is a sequence of characters and is terminated by an end-of-line character.