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A queue invariant is a condition a. that is more stringent than invariants for other types...

A queue invariant is a condition

a.

that is more stringent than invariants for other types of collections

b.

that is required to be true after the execution of each queue class method

c.

obeyed by queues that need to remain constant

d.

that is true regardless of the actual type used to instantiate a generic queue.
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A queue invariant is a condition that is required to be true after the execution of each queue class method

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