19/02/24 CT

Question 1

What is the binary line

Answer 1

128-64-32-16-8-4-2-1

Question 2

Why do computers use 0s and 1s

Answer 2

• It is the only language they understand.
• Only 2 states.

Question 3

What is the highest number you can make with the binary line

Answer 3

0 - 255

Question 4

0 + 0 =

Answer 4

0

Question 5

0 + 1 =

Answer 5

1

Question 6

1 + 0 =

Answer 6

1

Question 7

1 + 1 =

Answer 7

0 carry the 1

Question 8

1 + 1 + 1 =

Answer 8

1 carry the 1

Question 9

Hexadecimals table

Answer 9

0 = 0
1 = 1
2 = 2
3 = 3
4 = 4
5 = 5
6 = 6
7 = 7
8 = 8
9 = 9
10 = A
11 = B
12 = C
13 = D
14 = E
15 = F

Question 10

How do you convert denary to HEX
e.g. 184

Answer 10

(Short division) 16 ÷ 184
11.8…
11 = B
8 = 8
Answer = B8

Question 11

How do you convert HEX to denary
e.g. DA

Answer 11

D x 16 + A
13 x 16 + 10
208 + 10
Answer = 218

Question 12

How do you convert HEX to binary
e.g. 5A

Answer 12

5A
5 = 0101
A = 10 = 1010
Answer = 01011010

Question 13

How do you convert binary to HEX
e.g. 180

Answer 13

180 = 10110100
1011 - 0100
11 - 4
Answer = B4

Question 14

What is the 16 times table

Answer 14

1 x 16 = 16
2 x 16 = 32
3 x 16 = 48
4 x 16 = 64
5 x 16 = 80
6 x 16 = 96
7 x 16 = 112
8 x 16 = 128
9 x 16 = 144
10 x 16 = 160
11 x 16 = 176
12 x 16 = 192
13 x 16 = 208
14 x 16 = 224
15 x 16 = 240
16 x 16 = 256

Question 15

What are the 3 logic gates

Answer 15

1. NOT gates
2. AND gates
3. OR gates

Question 16

NOT gates

Answer 16

• Only has 1 input
• Output should be the opposite of an input.

Question 17

AND gates

Answer 17

• 2 inputs
• For you to get an output of 1, both inputs must be 1.

Question 18

OR gates

Answer 18

• 2 inputs
• For your output to be 1, one of your inputs has to be 1.

Question 19

Flow charts
Circle

Answer 19

Start / stop / end

Question 20

Flow charts
Rectangle

Answer 20

Instruction / process

Question 21

Flow charts
Parallelogram

Answer 21

Input / output

Question 22

Flow charts
Diamond

Answer 22

Decisions

Question 23

Flow charts
Arrows

Answer 23

Shows the flow of data

Question 24

Flow charts
Rectangle with line inside

Answer 24

Storage

Question 25

How many stops / ends are allowed in a flowchart

Answer 25

Only 1

Question 26

Str (String)

Answer 26

Anything you put in speech marks

Question 27

Boo (Boolean)

Answer 27

Yes or No

Question 28

Float

Answer 28

Decimals

Question 29

Int (Integer)

Answer 29

Whole numbers

Question 30

Char (character)

Answer 30

1 Character

Question 31

Syntax Error

Answer 31

Error where the code wont run

Question 32

Logic Error

Answer 32

Error where the code will run but it won’t give you the correct output

Question 33

What is the use of # in coding

Answer 33

Used to write a comment that won’t be included in the actual code. (Just for understanding)

Question 34

Equal to

Answer 34

a==b

Question 35

Not equal to

Answer 35

a!=b

Question 36

Less than

Answer 36

a<b

Question 37

Greater than

Answer 37

a>b

Question 38

Loop (in a program)

Answer 38

Can execute statements multiple times.
A programming structure that repeats a sequence of instructions until a specific condition is met.

Question 39

(Commands words)
Case sensitive

Answer 39

Whether or not a program or system distinguishes between uppercase and lowercase letters in text.

Question 40

(Command words)
Changes colour

Answer 40

Changes the colour of the code to be able to see better.

Question 41

Variables

Answer 41

A named memory location which temporarily stores data that can change while the program is running.
Stores only 1 character.