CompTIA Tech+ (FC0-U71)
FHG University prepares you for this exam on the IT Foundations track. Here are the modules mapped to its published objectives, and the opening of one to read now.
Examination preparation — these exams are set and awarded by their issuers. FHG prepares you for them and cannot grant them.
The modules mapped to it
11 modules · about 3 h 25 min estimated in all
How Computers Count — Binary, Hex, and Why It Matters
A CompTIA Tech+ objective, and not math for its own sake — the reason each IPv4 octet stops at 255, why colors are written as #FF0000, and why Windows can show a drive as smaller than the number on the box.
Why a computer counts differently
A computer is made of switches, and a switch is on or off. That is the whole reason binary exists: with only two states available, everything has to be built out of them.
Counting in binary works exactly like counting in tens, with fewer digits. In decimal each column is worth ten times the one to its right — ones, tens, hundreds. In binary each column is worth twice the one to its right — 1, 2, 4, 8, 16, 32, 64, 128.
So 1101 is 8 + 4 + 0 + 1 = 13. Read right to left, add up the columns where there is a 1. That is the entire technique.
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Preparation means the material maps to the published objectives. It is not a promise of a pass, and CompTIA sets, administers and awards the exam.