Basic Computer Knowledge: Practical Literacy
Core Concepts
Expect questions on hardware and software, input and output devices, memory units, operating systems, word processing, spreadsheets, the internet, email, and basic security.
Traps to Watch
Distinguish primary memory (RAM, ROM) from secondary storage (hard disk, SSD). RAM is volatile; ROM is not. Know that 1 KB is 1024 bytes in binary convention. Do not confuse the CPU with the ALU; the ALU performs arithmetic and logic, while the control unit directs operations. Watch for questions on file extensions: .docx for documents, .xlsx for spreadsheets. In email, distinguish CC from BCC.
Worked Example
If asked which memory loses data when power is off, answer RAM. Rule of thumb: volatile means power-dependent; ROM retains data permanently.
Study Strategy
Practice basic spreadsheet formulas and file management tasks. Keep a glossary of acronyms such as CPU, RAM, URL, and HTTP.