Edexcel GCSE Computer Science (1CP2) Exam Questions

• C It keeps the car at a constant speed (1)
• The only correct answer is C. The correct answer is it keeps the car at a constant speed.
• A is not correct because controlling the interior lights is done by a different embedded system in the car
• B is not correct because displaying a map for the driver is done by the satellite navigation system
• D is not correct because sounding an alarm is done by a different embedded system in the car

• A 32 (1)
• The only correct answer is A. The correct answer is 32.
• B is not correct because 33 is the ASCII code for the exclamation mark (!)
• C is not correct because 48 is the ASCII code for the character 0
• D is not correct because 65 is the ASCII code for the uppercase letter A

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

• Parts of a file are moved so they are stored together/in consecutive locations (1) so the read/write head has less distance to travel to read the file (1)
• Files are rearranged so that each file is stored in one block (1) which reduces the time taken to open/load the file (1)
• Free space on the disk is collected into one area (1) so new files can be saved without becoming fragmented (1)
• The parts of each fragmented file are put in order (1) so fewer movements of the read/write head are needed to read it (1)

Do not accept responses about compressing files, deleting files or increasing the amount of storage, as these are not what defragmentation software does.

Do not accept 'it makes the disk faster' without saying how the files are changed.

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

• The interpreter executes each line as soon as it has been translated (1) so translation and execution happen together/at the same time (1)
• The compiler translates the whole program first (1) and the machine code is run later/separately (1)
• The interpreter translates the code and runs it while the program is running (1) whereas the compiler does not run the code it produces (1)
• The compiler produces translated code that is executed only after all the translation has finished (1) but the interpreter executes each line immediately (1)

Allow 'translates one line at a time' where it is linked to executing each line immediately.

Do not accept answers that only state that a compiler is faster/an interpreter is slower, without reference to when execution happens.

Do not accept answers that only give object code, error reporting or portability, without reference to when execution happens.

Do not accept the compiler executing the program as it translates it.