Year 9 basics

Question 1

Whats an If statement?

Answer 1

If the statement is true, then do a group of things once

Question 2

Whats an if/else statement?

Answer 2

If the ‘if’ statement is false, the ‘else’ statements will be executed.

Question 3

Whats a flow chart?

Answer 3

A diagram portraying a process, a system or computer algorithm.

Question 4

What shape is the start/end of a flowchart?

Answer 4

oval - rectangle with rounded corners

Question 5

What shape is the input/output of a flowchart?

Answer 5

A parallelogram - tilted rectangle

Question 6

What shape is the process of a flowchart?

Answer 6

A rectangle

Question 7

What shape is the decision of a flowchart?

Answer 7

A Diamond

Question 8

Whats a while loop?

Answer 8

Runs the code forever until the condition is satisfied

Question 9

Whats a for loop?

Answer 9

Runs code a certain number of times

Question 9

Whats RAM?

Answer 9

Random Access Memory

Question 10

Is RAM volatile or non-volatile?

Answer 10

Volatile

Question 11

Why is RAM volatile?

Answer 11

Computer needs to be on, changes a lot. If the computer is turned off, it wipes. Day to day operations.

Question 12

Whats ROM?

Answer 12

Read Only Memory

Question 13

Is ROM volatile or non-volatile?

Answer 13

Non-volatile

Question 14

Why is ROM non-volatile?

Answer 14

Changes only when programmed. Stays when the power is off.

Question 15

What does RAM do when power is turned off?

Answer 15

It gets wiped.

Question 16

What does ROM do when the power is turned off?

Answer 16

Stays

Question 16

What does ROM do when the power is turned off?

Answer 16

Stays

Question 17

Name two differences between RAM and ROM.

Answer 17

RAM is volatile, ROM is Non-volatile. RAM is for day-to-day operations, while ROM is usually left alone for long periods of time

Question 18

Whats a subroutine?

Answer 18

A small block of code inside ‘def’ designed to preform a particular task. It can be called by writing the subroutine’s name in a program statement

Question 19

Whats an Integer?

Answer 19

A whole number. Can do mathematic functions.

Question 20

Whats a Character?

Answer 20

A single visual object to represent text, numbers, or symbols. Can do string operations.

Question 21

Whats a String?

Answer 21

A collection of Characters. Can do string operations.

Question 22

Whats a Float/Real?

Answer 22

A decimal number. Can do mathematic operations.

Question 23

Whats a Boolean?

Answer 23

True/false operations.

Question 24

Whats a Variable?

Answer 24

Stores a piece of data that might be needed later in the program. E.g. Name, Age, time, x, y.

Question 24

Whats happens if you haven’t defined a variable?

Answer 24

It does not exist to the computer

Question 25

Whats Binary?

Answer 25

A system where numbers and values are expressed 1 or 0.

Question 26

Whats Denary?

Answer 26

Denary is a base 10 number system, also known as decimal. Each number position contains one of the 10 digits of 0-9.

Question 27

Pros of Star Networks.

Answer 27

Very reliable, when a device or cable fails, other connected devices will still work. Easy to use. Highly efficient

Question 28

Whats a Star Network?

Answer 28

Each piece of network is attached to a central switch

Question 29

Cons of Star Networks.

Answer 29

High cost. Central device dependency. High maintenance.

Question 30

Whats a Mesh Network?

Answer 30

All devices and computers are interconnected.

Question 31

Pros of using Mesh Network.

Answer 31

Failure of one device does not affect the network. No traffic. Multiple paths for data transmission.

Question 32

Cons of using Mesh Network.

Answer 32

High cost. Hard to maintain.