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ZIMSEC · O Level

Computer Science

8 topics8 with notes

ZIMSEC O Level Cambridge O Level ZIMSEC A Level Cambridge A Level
Form 4Writing O Level finals this year?Revision mode: every Computer Science past paper by year, with marking schemes, and a checklist of the whole syllabus.
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Form 1 1 topics

  1. Computer systems: hardware and software A computer is an electronic device that accepts data (input), processes it, stores it and produces information (output). Notes 1 PDF

Form 2 3 topics

  1. Data representation Computers store all data as binary digits (bits): 0 or 1. Notes 1 PDF
  2. Networks and the internet A network connects computers so they can share resources (files, printers, internet) and communicate. Notes 1 PDF
  3. Algorithms, flowcharts and pseudocode An algorithm is a set of step-by-step instructions to solve a problem. Notes 1 PDF

Form 3 1 topics

  1. Programming concepts Arithmetic (+, −, *, /, MOD for remainder, DIV for whole-number division); comparison (=, , , =); logical (AND, OR, NOT). Notes 1 PDF

Form 2 1 topics

  1. Databases and spreadsheets A database stores organised data so it can be searched and sorted quickly. Notes 1 PDF

Form 1 1 topics

  1. Security, ethics and safety Strong passwords and two-factor authentication, antivirus software, firewalls, encryption, regular updates, access rights, and regular backups stored in a different place or the cloud. Notes 1 PDF

Form 3 1 topics

  1. Systems development and ICT in society The systems development life cycle Analysis: study the current system (interviews, questionnaires, observation) and identify requirements.Design: plan inputs,… Notes 1 PDF