Suppose a Relational Database Contained Two Linked Tables

question 69

Multiple Choice

Suppose a relational database contained two linked tables.Which of the following items is not necessarily present in the database?

• A) two primary keys
• B) two foreign keys
• C) at least one column
• D) one foreign key

Understand the implications of supply-demand imbalance and the necessity of dummy destinations or sources.

Describe how to handle prohibited routes in a transportation model.

Calculate improvement indices and identify optimal solutions.

Understand the basic concept and structure of chromosomes and genes.

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Definitions:

Self-Report

A method of gathering data where participants provide information about themselves, typically through questionnaires or interviews.

Methodological Flaw

A deficiency or error in the design or execution of a research study that can compromise validity or reliability.

Social Desirability Bias

A tendency for respondents to answer questions in a manner that will be viewed favorably by others, often leading to inaccuracies in self-report measures.

Goals of Science

The objectives of scientific inquiry, generally including the description, prediction, explanation, and control of natural phenomena, based on empirical evidence and systematic observation.