Power Supply/Electronic Representation

Question 1

Most cell phones and tablets are powered directly from batteries that are recharged using an ___________. Adapters are plugged into wall outlets and convert AC to DC.

Answer 1

AC Adapter

Question 2

__________________ eliminates the cable when charging.

Answer 2

wireless charging platform

Question 3

Desktop computers have a ___________ located within the system unit. This unit plugs into a standard wall outlet, converts AC to DC, and provides the power to drive all of the system unit components.

Answer 3

power supply unit

Question 4

Our voices create ________, or continuous signals that vary to represent different tones, pitches, and volume.

Answer 4

analog

Question 5

Computers, however, can recognize only ________ electronic signals.

Answer 5

digital

Question 6

Data and instructions can be represented electronically with a two-state or __________ or numbers (o and 1).

Answer 6

binary system

Question 7

Each 0 or 1 is called a _____.

Answer 7

bit

Question 8

A ________ consists of 8 bits.

Answer 8

byte

Question 9

A ________________ uses 16 digits to represent binary numbers.

Answer 9

hexadecimal system (hex)

Question 10

_______________ assign unique sequences of bits to each character.

Answer 10

character encoding standards

Question 11

Character encoding standards have three standards:

Answer 11

1. ASCII- American Standard Code for Information Interchange
2. EBCDIC- Extended Binary Coded Decimal Interchange Code
3. Unicode

Question 12

_____________. Historically used for personal computers.

Answer 12

ASCII

Question 13

__________. Historically used for mainframe computers.

Answer 13

EBCDIC

Question 14

_______ 16-bit code, most widely used standard.

Answer 14

unicode