Reviewer for Information Technology fundamentals.
1
Hardware vs Software
| Type | Examples |
|---|---|
| Hardware | CPU, RAM, storage, peripherals |
| Software | OS, applications, drivers |
💡 Exam Hack
The CPU is the "brain"; RAM is fast temporary memory; storage (HDD/SSD) keeps data permanently.
2
Operating Systems
The OS manages hardware and software resources (Windows, Linux, macOS, Android). It handles processes, memory, files, and I/O.
3
Number Systems
Decimal (10) · Binary (2) · Hexadecimal (16)
Computers work in binary — bits (0/1) group into bytes (8 bits).
4
Worked Example
Convert binary 1010 to decimal.
1010₂ = 8 + 0 + 2 + 0 = 10
📌 Quick Recap — Master These
Before your exam, make sure you can confidently explain and apply each of the following:
- Hardware vs Software
- Operating Systems
- Number Systems
- Worked Example
Re-read any section above where you hesitate, then explain it aloud in your own words — if you can teach it simply, you understand it. Focus your final review on the tables, formulas, and the common-mistake warnings, since those are where most points are won or lost.