unit 1.4.1

Question 1

primitive data type

Answer 1

a data type provided by the programming language

Question 2

chraracter

Answer 2

a single alphanumeric character

Question 3

string

Answer 3

one or more alphanumeric characters

Question 4

float/real

Answer 4

a number with a fractional part

Question 5

ineger

Answer 5

a whole number

Question 6

boolean

Answer 6

a binary (true false, 1 0) value

Question 7

hex - advantages

Answer 7

easier for humans to read/remember, quicker for humans to read/write, easy to convert to deary

Question 8

hex - uses

Answer 8

MAC addresses, colours (RGB), assembly and mahcine code

Question 9

ASCII (American Standard Code for Information Interchange)

Answer 9

Each character is represented by a 7-bit binary code allowing for 128 characters, first 32 are control codes

Question 10

extended ASCII

Answer 10

extra bit was added for extra characters

Question 11

unicode

Answer 11

was introduced to standardise character encoding across languages, first 256 characters are identical to extended ASCII making it compatible with older documents

Question 12

0+0

Answer 12

0

Question 13

0+1

Answer 13

1

Question 14

1+1

Answer 14

10

Question 15

1+1+1

Answer 15

11

Question 16

overflow error

Answer 16

occurs when the result of an operation exceeds the number of bits the computer works with

Question 17

sign and magnitude

Answer 17

MSB is used to denote sign where 0 is positive and 1 is negative

Question 18

two’s compliment

Answer 18

convert positive to binary, flip the bits, add 1

Question 19

binary subtraction

Answer 19

done by adding the first number the the negative 2nd number in 2s compliment

Question 20

unsigned - smallest posible

Answer 20

0

Question 21

unsigned - biggest possible

Answer 21

(2^n)-1

Question 22

unsigned - range

Answer 22

2^n

Question 23

two’s compliment - smallest possible

Answer 23

-(2^(n-1))

Question 24

two’s compliment - biggest possible

Answer 24

+(2^(n-1) - 1)

Question 25

two’s compliment - range

Answer 25

2^n

Question 26

sign and magnitude - smallest possible

Answer 26

-(2^(n - 1) - 1)

Question 27

sign and magnitude - biggest possible

Answer 27

+(2^(n - 1) - 1)

Question 28

sign and magnitude - range

Answer 28

(2^n) - 1

Question 29

higher accuracy

Answer 29

lower range

Question 30

normalisation - advantages

Answer 30

provides maximum precision