Edexcel GCSE Computer Science (1CP2) Exam Questions

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

• Receives input from/sends output to peripheral devices (1)
• Communicates with/controls a peripheral using its device driver, including installing the driver for a new device (1)
• Manages the print queue/buffer so that print jobs are sent to the printer in turn (1)
• Reports the status of a device/a device error to the user, e.g. out of paper (1)

Allow answers that name a specific peripheral, as long as they also say what the operating system does with it, e.g. 'it controls the printer using its driver'.

Do not accept 'manages peripherals'/'controls the hardware' on its own, as this repeats the question.

Do not accept 'managing files' or 'managing users' (file management and user management are other functions of an operating system).

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

• Decides which process is given use of the CPU (1) so that more than one program can run/appear to run at the same time (1)
• Allocates CPU time to each process (1) so that no single process takes control of the CPU (1)
• Manages the states/life-cycle of each process (1) so processes can be moved between ready/running/blocked (1)
• Keeps track of the processes and their status (1) so a process waiting for a resource can be returned to the CPU when it is ready (1)

Do not accept responses that only describe what a process is.

Do not accept responses that only list the types of operating system management.

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 explanation such as:

• Data is sent to/received from the correct peripheral (1) because the operating system controls the transfer of data between the computer and each device (1)
• A new peripheral can be used as soon as it is connected (1) because the operating system installs/loads the correct device driver for that device (1)
• Data can be sent to a slow peripheral such as a printer (1) because the operating system stores it in a buffer/print queue until the device is ready to receive it (1)
• The user is told when a peripheral has a problem (1) because the operating system receives status information from the device and reports the error to the user (1)

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

Allow specific peripherals as the example (e.g. a mouse, a printer) provided the reason says what the operating system does.

Allow 'the operating system responds to an interrupt from a device' as a point, with the reason that the device is signalling that it needs attention/has finished its job.

Do not accept 'the operating system manages/controls the peripherals' or 'it lets the devices be used'/'the peripherals work correctly' on their own, as these repeat the question without saying what the operating system does.