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_____ control can be used to avoid potential problems when two or more users attempt to access the same record at the same time.
Experiment
A scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact.
Prototype
An early sample, model, or release of a product built to test a concept or process.
Observations
The act of closely monitoring or noting phenomena or behaviors for the purpose of gathering information.
Data
Facts and statistics collected together for reference or analysis, often used as a basis for decision-making or research.
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