PSU and MB

Motherboard

100

Four main variants of ATX and their sizes

EATX 12"x13"

ATX 12"x9.6"

MicroATX 9.6"x9.6"

Flex 7.5"x7.5"

200

What does PCIe stand for

Peripheral Component Interconnect 

300

What does DIMM stand for

Dual in line memory module

400

What does POST stand for

Power-On-Self-Test

500

Can BIOS be upgraded?

Yes

PSU

100

PSU are rated in which unit

Watts

200

What is the most common form factor for PSU's?

ATX

USB

100

What does USB stand for

Universal Serial Bus

200

How many devices can a USB support

127

Calculation

100

What is the formula for calculating wattage

Volts x Current 

200

What is the formula for ohms law 

Current x Resistance