Input and Output

Question 1

What can input do?

Answer 1

1. It provides the running software on what to do next, or

2. it can be data that must be processed

Question 2

Point and shoot camera

Answer 2

A point and shoot camera does not allow you to change lenses, is compact and is designed for quick use.

Question 3

DSLR cameras

Answer 3

A DSLR camera is designed more for professional use - it lets you change lenses and allows more control over over technical settings

Question 4

What specifications determine the quality of a digital camera?

Answer 4

Lenses: Larger lenses captures more light.
Sensor size: Larger sensors can capture light more efficiently
Resolution: This is the total number of of pixels that make up a picture.
ISO rating: This is how sensitive the camera is to light.

Question 5

What is Optical zoom?

Answer 5

Optical zoom uses lenses on the camera to ‘get closer’ to the object being photographed. Use this for better quality images.

Question 6

What is Digital zoom?

Answer 6

Digital zoom is like using a magnifying glass tool in image editing software. The more you zoom, the more blurry it gets.

Question 7

What is a Scanner?

Answer 7

It is a input device that scans images to a computer

Question 8

How to determine the quality of a Scanner?

Answer 8

1. Resolution (dpi)
   2.Color depth (It refers to the number of different colors
   that can be presented by a pixel)

Question 9

dpi (dots per inch)

Answer 9

1. The greater the dpi, the better quality of the image.

2. The higher the dpi, the larger image file

Question 10

Advantages of Scanners

Answer 10

1. Scanned copies can be emailed directly
   instead of having to be faxed.
2. The Electronic copies are stored digitally and
   do not take up office space as paper files do.
3. Old documents and photos can be scanned
   and shared with others.
4. Large documents consisting of many pages
   can be scanned and saved as a pdf file.

Question 11

Disadvantages of scanners

Answer 11

1. Scanners can take a lot of time.

2. The quality of the digital image depends on the quality original hard copy

Question 12

What is biometric input?

Answer 12

It involves capturing unique biological features of a person such as fingerprint or iris of your eye.

Question 13

Advantages of Biometric Input

Answer 13

1. It is more secure.
2. Difficult to defeat, cause it is tied to a single
   person.