Without experience you need theory and education that is science that is math that is algebra, geometry,trigonometry

How to transpose equations.

Your train of thought is what they are looking for.

Assemblers need to know the actual components through hole and surface mount and simple mathematics. Multiply,divide fractions. They need to know the dimensions of the components themselves and the values of those components.

SMD resistors and SMD capacitors

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SOT-23 is used for small-signal transistors and measures 2.9 mm x 2.4 mm x 1.1 mm.

SOT-323 is used where you need to fit in a smaller space and measures 2.1 mm x 2.1 mm x 0.9 mm.

SOT-523 is used where you need the ultimate small size and measures 1.6 mm x 1.6 mm x 0.7 mm

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SMD Integrated Circuits

There are five main package types for SMD integrated circuits (ICs).

Small outline integrated circuit (SOIC)

Small outline package (SOP)

Quad flat pack (QFP)

Plastic leaded chip carrier (PLCC)

Ball grid array (BGA).

In addition, some SMD package types for ICs have multiple styles. SOP packages provide an example.

Thin small outline package (TSOP)

Shrink small outline package (SSOP)

Thin shrink small outline package (TSSOP)

Quarter-size small outline package (QSOP)

Very small outline package (VSOP)

There are also different styles of QFP packages for surface mount devices.

Low profile quad flat pack (LQFP)

Plastic quad flat pack (PQFP)

Ceramic quad flat pack (CQFP)

Thin quad flat pack (TQFP)

Some through all components.

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Need to know ohm's law.

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