The Field You Use for the Primary Key Should Have

question 20

Multiple Choice

The field you use for the primary key should have a checkmark in the _____ box.

• A) Required
• B) Indexed
• C) Validated
• D) Unique

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Definitions:

Shift Instructions

In programming and digital systems, shift instructions are used to move or "shift" bits in a register or variable to the left or right, often for operations like multiplication or division.

Bit Shift Up

Bit shift up is a binary operation that moves the bits of a binary number to the left by a specified number of positions, effectively multiplying the number by a power of two.

Bit Shift Down

A binary operation that moves bits to a lower position, effectively dividing the number by two for each shift.

Sequencer Instruction

A command in PLC programming that controls the execution of a sequence of operations or steps, typically used in automation processes.