1.4.1

Question 1

data types (5)

Answer 1

Integer
Real/float
Boolean
Character
String

Question 2

primitive data type

Answer 2

any basic data type provided by a language as a foundational building block

Question 3

integer

Answer 3

represents any positive or negative whole number

Question 4

real

Answer 4

real or float

any real world quantity as a number

Question 5

floating point

Answer 5

real or float

any real world quantity as a number

Question 6

character

Answer 6

represents a single character – this can be any alphanumeric character or symbol

Question 7

string

Answer 7

represents a collection of characters

it can include any alphanumeric characters or symbols

Question 8

boolean

Answer 8

represent one of two truth values associated with logic and Boolean algebra – typically, true or false

Question 9

binary - sign and magnitude

Answer 9

first bit
0 = positive
1 = negative

Question 10

binary - 2s complement

Answer 10

first bit
0 = positive
1 = negative
but if -ve then all other 1s are adding to the -ve first bit

Question 11

subtraction of binary

Answer 11

e.g. 73 - 106 —-> 73 + -106 (use 2s complement)

Question 12

hexidecimal

Answer 12

0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F

Question 13

floating point in binary

Answer 13

always uses 2s complement

as you go –> along it halves

Question 14

binary - mantissa

Answer 14

The number itself

Question 15

binary - exponent

Answer 15

The position of the binary point in the number

(always uses 2s complement)
+ve decimal moves –> along
-ve decimal moves <– along

Question 16

positive normalised binary starts with…

Answer 16

01

Question 17

positive normalised binary starts with…

Answer 17

10

Question 18

when +/- floating points

Answer 18

line up the decimal points

Question 19

binary 1 bit left shift

Answer 19

doubles the number

Question 20

binary 1 bit right shift

Answer 20

halves the number

Question 21

binary shifts with signs

Answer 21

leave the first bit
if -ve pad with 1s not 0s

Question 22

bitwise AND

Answer 22

only if both are 1

Question 23

bitwise OR

Answer 23

if at least one is 1

Question 24

bitwise XOR

Answer 24

only one is 1

Question 25

AND mask

Answer 25

1s show the original
0s dont show the original

Question 26

OR mask

Answer 26

1s will only show 1s
0s will show the original

Question 27

XOR mask

Answer 27

1s will change each bit
0s will leave each bit the same

Question 28

IP4 address

Answer 28

193 . 74 . 211 . 63

Question 29

Character sets

Answer 29

agreed standards for referring to all the characters a computer can use

Question 30

ASCII

Answer 30

American Standard Code Information Interchange
7 bits (128)

Question 31

Extended ASCII

Answer 31

Extended American Standard Code Information Interchange
8 bits (256)

Question 32

UNICODE

Answer 32

was 16 bit
now 24 bit