6.3.2 Module 6 Quiz – Introduction to Relational Databases and SQL Exam Answers

6.3.2 Module 6 Quiz – Introduction to Relational Databases and SQL Exam Answers

6.3.2 Module 6 Quiz – Introduction to Relational Databases and SQL Exam Answers Full 100% | Data Analytics Essentials 2025

Relational databases and SQL are fundamental to managing and analyzing data efficiently, and Module 6 Quiz – Introduction to Relational Databases and SQL provides the perfect introduction to these powerful tools. This module covers key concepts such as database design, table relationships, and basic SQL commands like SELECT, INSERT, UPDATE, and DELETE. By mastering these foundational skills, you’ll be able to organize and query data effectively, setting the stage for more advanced data manipulation techniques. Use this comprehensive guide to secure a perfect score and enhance your proficiency in relational databases and SQL, essential for any data analytics professional.

  1. What is a flat file database?

    • a database that stores records in a single file with no hierarchical structure
    • a database that requires SQL to store, manipulate, and retrieve data
    • a database that is used to store large amounts of complex data
    • a database that stores data in a sheet using a hierarchical tabular format of columns and rows
      Answers Explanation & Hints:

      A flat file database is a simple database system that stores all data in a single file, typically in a plain text or delimited format like CSV. It lacks the complexity of hierarchical or relational structures and is often used for small-scale applications or to transfer data between systems.

  2. Which commonly used SQL statement is necessary to retrieve data from one or more tables in a database?

    • TRUNCATE
    • SELECT
    • INSERT
    • CREATE
      Answers Explanation & Hints:

      The SELECT statement is the most used SQL statement and is necessary when you need to retrieve data from one or more tables in a database.

  3. Which SQL statement is used to filter data in a database?

    • WHERE
    • FROM
    • ORDER BY
    • DISTINCT
      Answers Explanation & Hints:

      The WHERE statement is a conditional statement used to filter the returned results.

  4. What is used to show how the tables in a database are related to one another?

    • CSV
    • DDL
    • ERD
    • DML
      Answers Explanation & Hints:

      An Entity Relationship Diagram (ERD) shows how database tables are related to one another.

  5. In the SQL statement ” SELECT genre FROM movies” what is specified by “genre”?

    • the column
    • the table
    • the folder
    • the database
      Answers Explanation & Hints:

      The SELECT statement identifies the column in a table from which data is requested. In this example, the data in the “genre” column of the “movies” table is requested.

  6. Which structure in a table represents an individual record contained in the database?

    • foreign key
    • row
    • relationship
    • column
      Answers Explanation & Hints:

      In a relational database table, each row represents an individual record and the attributes associated with that record.

  7. What is represented by the comma-separated list of items following the SELECT command in this example? SELECT movieID, title

    • aliases
    • records
    • table names
    • columns (attributes)
      Answers Explanation & Hints:

      The SELECT command is followed by a list of the columns (attributes) that will be read and returned from the database table. The values contained in the movieID and title fields will be returned in this example.

  8. Which three elements of a relational database are defined in the schema? (Choose 3.)

    • attributes
    • SQL keywords
    • aliases
    • tables
    • relationships
      Answers Explanation & Hints:

      A schema is a formal description that describes the structure of the database and contains information about tables, attributes, and relationships.