Edexcel GCSE Computer Science (1CP2) Exam Questions

• A Address bus (1)
• The only correct answer is A. The correct answer is address bus. Do not accept 'address' on its own.
• B is not correct because the control bus carries control signals in both directions between the CPU and other components
• C is not correct because the data bus carries data in both directions between the CPU and main memory
• D is not correct because the system bus is the collection of all three buses

Award one mark for any of the following up to a maximum of two marks:

• Focus the lens/autofocus (1)
• Control the shutter (speed) (1)
• Control the flash/decide when the flash is needed (1)
• Measure the light level to set the exposure/the aperture (1)
• Stabilise the lens/image stabilisation (1)
• Zoom the lens in and out (1)
• Detect a face/smile (1)

Do not accept 'take a photograph'/'take a picture'/'capture an image', as taking photographs is the function of the camera, which is given in the question.

Do not accept 'press the button' as this is an action of the user, not a function performed by the embedded system.

Do not accept vague answers such as 'use the camera', 'turn the camera on and off' or 'make the camera work', which do not name a function that the embedded system performs.

Award up to two marks for a linked description such as:

• Makes a file/files smaller (1) so less storage space is needed on the disk (1)
• Reduces the size of the data (1) so it takes less time to upload/download/transfer the file (1)
• Compresses files/folders into a single file (1) so an attachment is under the size limit for email (1)
• Reduces the size of the files (1) so more of them fit onto a storage device/backup media (1)

Do not accept 'it compresses the files' on its own, as this repeats the question.

Do not accept responses about protecting files from malware/viruses or about deleting files.

Award up to two marks for a linked description such as:

• The compiler translates the whole program/complete source code in one go (1) whereas the interpreter translates one line/statement at a time (1)
• The compiler translates all of the source code before any of it is run/executed (1) but the interpreter translates each line/statement as it reads it (1)
• The interpreter translates one line/statement at a time (1) and the compiler translates the whole program/source code together (1)

Accept the compiler point and the interpreter point in either order.

Do not accept responses about object code/executable files, when the translated code is executed, how errors are reported, or speed/memory use.

Do not accept 'the interpreter executes/runs each line' on its own, without saying that it translates one line/statement at a time.

Award up to two marks for a linked explanation such as:

• All the devices can share one internet connection (1) because the router forwards data packets between the home network and the internet (1)
• Data can reach the correct device on the home network (1) because the router uses the destination IP address to forward each packet to that device (1)
• Each device does not need its own separate connection to the internet (1) because the router forwards data packets for all the devices between the home network and the internet (1)

For both marks, the expansion must follow/associate with the statement.

Do not accept 'it provides Wi-Fi' because Wi-Fi is not why a router is needed to connect to the internet.

Do not accept 'it connects the home network/devices to the internet' or 'a router connects networks' without saying what the router does with the data, as this restates the question.

Do not accept 'it connects the cables' without saying what it does with the data.