Database Concepts Quiz

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Questions and Answers

What is the primary purpose of Normalization in SQL?

  • Ensure data is stored logically (correct)
  • Store data illogically
  • Cause Insertion Anomalies
  • Increase data redundancy

Which stage of relational databases design involves importing and converting data from the old system into the new database?

  • Normalization
  • ER Modeling
  • Data conversion (correct)
  • Testing

What is the purpose of ER Modeling in database design?

  • Store data illogically
  • Reduce data redundancy
  • Define data elements and relationships (correct)
  • Cause Deletion Anomalies

Which database element serves as the primary unit of organization and storage of data?

<p>Tables (D)</p> Signup and view all the answers

What is the objective of testing in the implementation stage of relational databases design?

<p>Check the database against requirement specifications (B)</p> Signup and view all the answers

What does Normalization in SQL aim to eliminate?

<p>Redundant data (B)</p> Signup and view all the answers

What is the recommended approach before sketching out tables and columns for a database project?

<p>Wait and gather information (C)</p> Signup and view all the answers

What is a database requirement?

<p>Attributes the database must contain to store necessary information (D)</p> Signup and view all the answers

What is the purpose of work shadowing in the context of a database project?

<p>Observing the flow of information (A)</p> Signup and view all the answers

In a database, what are data requirements primarily focused on?

<p>Attributes necessary for storing information (D)</p> Signup and view all the answers

What is the primary purpose of initial interviews with chief stakeholders in a database project?

<p>To understand customer needs and project initiation (B)</p> Signup and view all the answers

What do most databases need to generate, according to the text?

<p>Report requirements (A)</p> Signup and view all the answers

What is the purpose of the planning stage in the database development life cycle?

<p>To take into consideration the Information Systems strategy of the organization (A)</p> Signup and view all the answers

Which stage of the database design process involves implementing the logical model of a database?

<p>Physical model (B)</p> Signup and view all the answers

Why is it important for a database system to go through a development life cycle?

<p>To optimize performance and high-quality design (B)</p> Signup and view all the answers

What distinguishes the logical model stage from the physical model stage in database design?

<p>Logical model is concerned with developing a database model without physical implementation (B)</p> Signup and view all the answers

In the context of database design, what does the system definition stage primarily focus on?

<p>Defining the scope and boundaries of the proposed system (B)</p> Signup and view all the answers

Why might the steps in the development life cycle not have to be followed religiously on small database systems?

<p>Because small systems are typically simple and may not need all stages (B)</p> Signup and view all the answers

What is the primary function of a column in a database?

<p>Store related records of a table (C)</p> Signup and view all the answers

In a database schema, what does the conceptual model primarily focus on?

<p>Organizational and physical structures (C)</p> Signup and view all the answers

Which database model distinguishes between the hardware's specifications and the OS initiated by the database?

<p>Internal Model (C)</p> Signup and view all the answers

What is the purpose of an external model in a database schema?

<p>Provide application interface (A)</p> Signup and view all the answers

Which element in a database schema gives access to just a single owner who can modify objects within it?

<p>Schema (C)</p> Signup and view all the answers

What does each column in a table have that determines the type of data it can store?

<p>Data Type (D)</p> Signup and view all the answers

What is the purpose of a primary key in a database?

<p>Ensure uniqueness of each row (C)</p> Signup and view all the answers

In a relational database, what kind of relationship is established between tables using primary and foreign keys?

<p>Parent-Child Relationship (C)</p> Signup and view all the answers

Which type of relationship in a database links one table record to more than one record from another table?

<p>One-to-Many Relationship (A)</p> Signup and view all the answers

What role does a foreign key play in database design?

<p>Creating links between tables (B)</p> Signup and view all the answers

Which type of relationship involves many records from one table being linked to many records in another table?

<p>Many-to-Many Relationship (B)</p> Signup and view all the answers

What is the primary purpose of using primary and foreign keys in a relational database?

<p>Establishing relationships between tables (B)</p> Signup and view all the answers

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