Y10 Trial CTG

Y10 Trial CTG

Closing the Gap on the Trial - Networks and Hardware

General Feedback

• It was a tricky paper!

• Lots of people made similar mistakes

• But fantastic effort from the vast majority!!

What are we going to do next?

• Focus on the areas where you, as a group, performed weakest

• Make sure we include more exam question practice

• Build up your exam technique

Question 1 + 2 - Networks

Common issues: Exam Technique

Open Ended

What is a network? Imagine you're explaining the idea to a year 5 or 6 - use the simplest words you can!

Network

A network is one or more devices which are connected together in order to share resources.

Open Ended

Why do we have networks?

What is the point of them? What do they let us do?

Misconception 1 - What are the advantages of a LAN?

- almost everyone got this wrong -

LAN

• A network in a small geographical area

• Such as a school or office

• (which uses only internally owned hardware)

The Question...

• Doesn't mention WANs

• Gives you some context about the company

• Wants you to talk about a LAN compared to no network.

Multiple Select

What are the benefits to the bakery of using a LAN?

• Easier to set up without a specialist

• Cheaper and easier to use

• Resources can be shared between computers

• Less hardware needed as can share printers

• Everyone can log on to every computer

Takeaways

• Look at the number of marks - 4 marks for 2 advantages means two explanations too - why is your point an advantage?

• Always be very clear what you are comparing - single phrases like 'cheaper', 'easier', 'more reliable' are not going to get marks without explanation

• Read the question carefully - if you are talking about something which hasn't been mentioned (such as WANs), could you have misunderstood?

Open Ended

Louise works in an office where there are 7 stand-alone PCs.

She is considering installing a LAN.

Explain one advantage and one disadvantage of a LAN. [4]

Question 3 - Hardware

Common Issues: Mixing up registers & components

You have already done a lesson with Mr Wilkinson on this!

• So I am just going to give you some quick questions!

Multiple Select

Select the COMPONENTS of the CPU (not registers) [2]

• MAR

• MDR

• CU

• PC

• ALU

Multiple Select

Select the REGISTERS of the CPU [2]

• ACC

• MDR

• ROM

• PC

• RAM

Multiple Select

These two registers store memory addresses.

• MAR

• MDR

• ACC

• PC

• CIR

Multiple Choice

This component stores frequently used instructions.

• RAM

• ROM

• Cache

• HDD

• Registers

Multiple Choice

This component stores all the programs and files currently in use.

• RAM

• ROM

• Cache

• HDD

• Registers

Multiple Choice

This component stores the instructions which tell the computer how to turn on.

• RAM

• ROM

• Cache

• HDD

• Registers

Multiple Choice

This component stores everyone which the user has saved onto their computer.

• RAM

• ROM

• Cache

• HDD

• Registers

Multiple Choice

This component stores single instructions/addresses inside the CPU.

• RAM

• ROM

• Cache

• HDD

• Registers

Fill in the Blank

During the fetch-decode-execute cycle, the instructions are fetched from ___ into the CPU.

Fill in the Blank

The __ is incremented by one at the end of each FDE cycle, as it points to the next instruction to be fetched.

Character Sets

What is a character set

• Inside your computer, everything is stored in binary

• So computers need a unified approach to storing LETTERS, SYMBOLS and NUMBERS as text

• A character set defines how text is stored in a computer- which binary code equals which letter.

How many are there?

• There are two you need to be aware of

• ASCII and Unicode

ASCII

• This is the simplest one

• It uses 8 bits (1 byte) per character

• Therefore, it can store...

Multiple Choice

How many different characters can ASCII represent using 8 bits?

• 128

• 127

• 255

• 256

Unicode

• Unicode has several different varieties, and uses between 1 and 4 bytes per character

• This allows it to represent many more characters

• Such as different languages, and emojis

Multiple Select

Select the one benefit and one drawback of using Unicode instead of ASCII. [2]

• Each character takes up more space

• A wider variety of languages can be represented

• It is easier for humans to understand

• It is less efficient

Fill in the Blank

Emily is storing a text file in ASCII. The file has 2000 characters, and each character takes up 8 bits of storage.

How large will the resulting file be in kilobytes?

Fill in the Blank

One byte is equal to _ bits.

Multiple Choice

Pick the largest piece of data.

• 16000 bits

• 4000 Kb

• 2 Mb

• 1 000 000 Bytes

Multiple Choice

Pick the smallest piece of data.

• 16000 bits

• 4000 Kb

• 2 Mb

• 1 000 000 Bytes