Hardware Flashcards

1
Q

Ergonomic keyboard

A

A keyboard that seperates the keys into two halves shaped like a wide “V”

Using an ergonomic keyboard puts less stress on the hands and wrists

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2
Q

What does the user’s finger making a keystroke on the virtual keyboard do

A

Breaks the infrared beam and reflects light back to the projector

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3
Q

Why did optical mice supersede mechanical mice

A

Because their sealed bottom surfaces do not absorb dust and dirt

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4
Q

What’s a pointing device

A

Any device used to control the movement of a cursor on a computer screen

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5
Q

Examples of a pointing devices

A

Touch screen
Touch pad
Trackball
Joystick
Stylus

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6
Q

What is a scanner

A

A scanner captures images for computer editing and display.

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7
Q

What are high and low resolution scanners used for

A

High resolution - used for scanning high resolution printing

Lower resolution - adequate for capturing images for computer display

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8
Q

Measurement unit of the resolution of a printed document or digital scan

A

DPI

Dots per inch

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9
Q

What does a handheld scanner consists of

A

A light source, a lens and a light sensor that translates optical impulses into electrical ones

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10
Q

What is a MFD

A

A multi functional device

A machine that can print, copy and scan

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11
Q

Examples of reading devices

A

Magnetic strip: Reads info from cards like credit cards.

Barcode scanner: Converts barcode images into text.

QR code: Readable by smartphones for quick access to information.

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12
Q

OCR

A

Optical character recognition scanner

Technology that turns scanned documents, PDFs, or images into editable and searchable text.

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13
Q

What does the monitor resolution describe

A

The visual dimensions of any given display

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14
Q

What is a refresh rate

A

The number of times a display’s image is updated

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15
Q

What is the refresh rate expressed in

A

Hertz

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