1.4.1 Data Types

Question 1

Primitive data types

Answer 1

One which is provided by a programming language
E.g, integer, real/float, Boolean, string

Question 2

Integer

Answer 2

A whole number E.g, 0, 231, -67

Question 3

Real/Float

Answer 3

A number decimal/fraction
E.g, 12.5, 0.0, -100.0001

Question 4

Character

Answer 4

A letter number or special character

Question 5

Boolean

Answer 5

A Boolean variable can only be TRUE or FALSE

Question 6

String

Answer 6

Anything in quotation marks(single or double ‘…’ “…”)

Question 7

Sign and Magnitude

Answer 7

Making the 128 bit the sign bit

00000011 = 3
10000011 = -3

Question 8

Two’s complement

Answer 8

Write down the unsigned binary
Invert every bit
Add 1

Question 9

Hexadecimal

Answer 9

16 figures
0-9 and A-F

Question 10

Denary

Answer 10

A numerical system that uses 10 as its base
0-9

Question 11

Floating point arithmetic

Answer 11

Allows very large numbers to be represented using the mantissa and the exponent

Question 12

A Bit

Answer 12

A bit is the fundamental unit of information in the form 0 or 1

Question 13

ASCII

Answer 13

American Standard Code for Information
Uses 7 bits which form 128 different bit combinations

Question 14

UNICODE

Answer 14

A 16-bit code to represent all possible characters

Question 15

Character sets

Answer 15

Groups of code that assign a character to a unique bit pattern