Topic outline

  • Algorithm Traces
    Your ability to read code is directly related to your ability to trace through algorithms figuring out what process is occurring.  If you can trace algorithms you will be able to debug and maintain code regardless of its authorship.

    In the exams you will expected to trace simple algorithms quickly and accurately. There are a number of traces here of varying complexity with answers (if available).

    The time taken is based on time available for the unit/exam and maximum number of mark available.  In the case of coursework this would include preparation time.


  • Trace 2001

    Taken from Task 1 2001 AS OCR Computing.  Worth 15 marks and ~23 GLHs.

    LO: Arrays.

  • Topic 2

    Old Specimen
    Taken from Specimen Paper for Syllabus 3820.  Worth 20 marks and ~30 GLHs.


    LO: not specific / not recommended unless all others done.

  • Topic 3

    Trace 2003
    Taken from 2003 AS OCR Computing. Worth 25 marks and ~38GLHs. 

    For full details go to http://w2.compu2learn.co.uk/trace-03/199

    LO: Arrays.

  • Array 2-05

    Worth 25 marks and 38GLHs

    LO: Arrays.

  • Mystery 4-05

    Taken from Task 4 2005 AS OCR Computing, this is an algorithm trace task where no implementation is required. Worth 21 Marks and ~32 GLHs.

    LO: Recursion.

  • Sift 2-06

    Taken from Task 2 2006 AS OCR Computing, this is an algorithm trace task. No implementation is required.  Worth 16 marks and ~18 GLHs. 

    LO: Arrays.

  • Curiosity 4-06

    Taken from Task 4 2006 AS OCR Computing, this is an algorithm trace task. No implementation is required.  Worth 23 Marks and ~35 GLHs.

    LO: Recursion.

  • Country Codes 2-07

    Taken from Task 2 2007 AS OCR Computing, this is a white box test task. No implementation is required. Worth 32 marks and ~ 48 GLHs.

    LO: Arrays

  • Calculator 2-08

    Taken from Task 2 2008 AS OCR Computing and worth 32 Marks it should take ~48 GLH.

    LO: Stacks;

  • Exam Trace 8-08

    Taken from Q8 Unit 2506 Exam Paper for Jan 2008 AS OCR Computing.  Worth 9 marks and ~9 mins.

    LO:  Repetition