When You Combine Two Columns to Create a Compound Key

question 25

Multiple Choice

When you combine two columns to create a compound key, you are ____ the columns.

• A) splitting
• B) converting
• C) joining
• D) concatenating

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Definitions:

Electrolyte

A substance that produces an electrically conducting solution when dissolved in a polar solvent, such as water, essential for the operation of batteries.

Armature

In electrical engineering, the rotating coil or coils of a dynamo or electric motor.

Brushes

Components made of conductive material that transmit electrical current between stationary wires and moving parts, often found in motors and generators.

Commutator

A rotary electrical switch in certain types of electric motors and generators that periodically reverses the direction of current flow through the rotor.