Basic Computer Knowledge and Digital Literacy
Scope
Basic Computer Knowledge and Digital Literacy covers hardware, operating systems, file management, word processing, spreadsheets, internet and email, and safe digital behaviour. Questions are practical: shortcuts, menu paths, storage units and cyber hygiene.
Core rules
- Hardware: the CPU is the processor; RAM is volatile working memory; ROM is non-volatile; an SSD has no moving parts.
- Storage: 1 KB = 1024 bytes, 1 MB = 1024 KB, 1 GB = 1024 MB, 1 TB = 1024 GB.
- Shortcuts: Ctrl+C copy, Ctrl+X cut, Ctrl+V paste, Ctrl+Z undo, Ctrl+S save, Ctrl+P print, Alt+Tab switch windows.
- Files: extensions identify type-.docx, .xlsx, .pptx, .pdf, .jpg, .exe; folders organise files.
- Email: To, Cc (visible copy) and Bcc (hidden copy); never open unexpected attachments.
- Cyber safety: strong unique passwords, two-factor authentication, verify URLs, and never share OTPs.
Worked example
In a spreadsheet, cells A1 to A5 contain 10, 20, 30, 40 and 50. What does =SUM(A1:A5) return, and what does =AVERAGE(A1:A5) return? SUM adds the range: 150. AVERAGE divides by the count of numeric cells: 150/5 = 30. Writing =SUM(A1,A5) would add only the two endpoints and return 60-a common error.
Traps that cost marks
- Confusing Cc with Bcc and exposing recipients.
- Thinking RAM stores files permanently.
- Including text cells in an average formula.
- Clicking phishing links that mimic a bank or government portal.
- Mixing decimal storage units with binary units.