01.01 - Data Representation

Question 1

Binary

Answer 1

Base-two number system based on the values 0 and 1 only.

Question 2

Bit

Answer 2

Abbreviation for binary digit

Question 3

One’s complement

Answer 3

Each binary digit in a number is reversed to allow both negative and positive numbers to be represented

Question 4

Two’s complement

Answer 4

Each binary digit is reversed and 1 is added in right-most position to produce another method of representing positive and negative numbers

Question 5

Sign and magnitude

Answer 5

Binary number system where left-most bit is used to represent the sign (0 = + and 1 = 1 -); the remaining bits represent the binary value

Question 6

Hexadecimal

Answer 6

A number system based on the value 16 (uses the denary digits 0 to 9 and the letters A to F)

Question 7

Memory dump

Answer 7

Contents of a computer memory output to screen or printer

Question 8

Binary-coded decimal (BCD)

Answer 8

Number system that uses 4 bits to represent each denary digit

Question 9

ASCII code

Answer 9

Coding system for all of the characters on a keyboard and control codes

Question 10

Character set

Answer 10

A list of characters that have been defined by computer hardware and software. It is necessary to have a method of coding, so that the computer can understand human characters

Question 11

Unicode