1.1 TYPES OF DIGITAL DEVICES

Question 1

MAINFRAME COMPUTER

Answer 1

Large, powerful computer. Does multiple complicated jobs quickly, can be used by many people at the same time.

Question 2

MICROPROCESSOR

Answer 2

Controls what computer does. Takes data as input, does something with it, provides output.

Question 3

FEATURES OF A DESKTOP

Answer 3

Has more space for components than laptops. Provides option to upgrade and add additional components. Usually needs peripheral devices (monitor, printer, mouse, keyboard)

Question 4

PERIPHERAL DEVICES

Answer 4

Equipment connected to the computer and used with it.

Question 5

FEATURES OF A LAPTOP

Answer 5

Includes keyboard, screen, track pad, rechargeable battery. Portable.

Question 6

SINGLE BOARD COMPUTERS (SBCs)

Answer 6

Affordable computers used in education. Does embedded computing projects and physical computing projects.

Question 7

EMBEDDED COMPUTING

Answer 7

Computing hardware fixed into position carrying out a specialist task.

Question 8

PHYSICAL COMPUTING

Answer 8

Interactive systems. Can sense and respond to the world around it.

Question 9

FEATURES OF MOBILE PHONE

Answer 9

More portable than a tablet, make calls, good battery life. Uses SIM card to connect to a mobile phone network.

Question 10

FEATURES OF TABLET

Answer 10

Larger screen than phone, better sound, more durable.

Question 11

SIM

Answer 11

Subscriber Identity Module. Used to identify subscriber to a mobile network.

Question 12

SPECIALIST PHONE

EG - EMERGENCY BUTTON

Answer 12

Mobile phones with specialist features, providing function which meets particular needs

Question 13

CAMERAS + CAMCORDERS

Answer 13

Uses light sensors to capture images formed by light passing through device’s lens. CAMERAS - capture still images. CAMCORDERS - capture video/ moving images.

Question 14

BENEFITS OF HAVING BETTER FEATURES IN CAMERAS + CAMCORDERS

Answer 14

• GOOD LENS = Light travelling through without defects. Allows user to control amount of light passing through.
• GOOD IMAGE PROCESSOR = Compensating for poor lighting conditions. Digital images are made up of small dots (pixels)
• BETTER QUALITY SENSORS = More details captures. Images with more pixels are produced.

Question 15

TELEVISION

Resolution of TV in pizels is horizontal pixels x vertical pixels.

Answer 15

Displays still and moving images on a screen. Most TVs come with built in speakers. HD (high definition) TVs contain larger number of pixels = higher resolution. UHD (ultra high definition) is referred to as 8k/4k because horizontal resolution = 4000/8000.

Question 16

SOUND SYSTEMS

Answer 16

Produces loud, rich sound using high quality speakers and amplifiers. Some speakers contain built-in amplifiers. Can be connected to smartphones, media players, tablets using wired (USB) OR wireless connection (BLUETOOTH)

Question 17

BLUETOOTH

Answer 17

Wireless connectivity allowing devices to connect over short distances.

Question 18

WHAT DO MEDIA PLAYERS DO?

Answer 18

Provide video and audio content to a TV. Streamed directly from the internet/accessed from network or local storage. Connects to TV wired/wireless.

Question 19

NAVIGATION AIDS

(sat-nav)

Answer 19

Calculates best route between 2 or more locations. Provides updates to the route if not followed accurately. Uses GPS satellites to determine exact location of device on earth.

Question 20

CONVERGENCE

Answer 20

Devices adopting technologies and features from other types of devices as they develop.