Database Normalization and Efficient SQL Design Quiz
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Questions and Answers

Which of the following is true about SQL?

  • SQL is a programming language.
  • SQL is a standard language for accessing and manipulating databases. (correct)
  • SQL is a type of database.
  • SQL is only used in web development.

    • What does RDBMS stand for?

  • Relational Data Manipulation System
  • Remote Data Manipulation System
  • Relational Database Management System (correct)
  • Remote Database Management System

    • What is a record in a database table?

  • A collection of related data entries
  • A field in a table
  • A column in a table
  • A row in a table (correct)

    • Which type of SQL command is used to define data tables?

    <p>Data Definition Language (DDL)</p> Signup and view all the answers

    Which SQL command is used to narrow down the amount of data selected from a table?

    <p>SELECT</p> Signup and view all the answers

    What does the CREATE command do in SQL?

    <p>Creates a new SQL database</p> Signup and view all the answers

    Which SQL command is used to remove rows from a named table?

    <p>DELETE</p> Signup and view all the answers

    Which of the following is NOT a use of SQL?

    <p>Retrieving subsets of information from a database</p> Signup and view all the answers

    What is the most basic unit of a database?

    <p>Table</p> Signup and view all the answers

    Which of the following is a logical representation of data assembled from one or more database tables?

    <p>View</p> Signup and view all the answers

    Which organization adopted the official SQL standard in 1986?

    <p>American National Standards Institute (ANSI)</p> Signup and view all the answers

    Which of the following is true about aggregation functions in SQL?

    <p>Aggregation functions can be used to compute average values</p> Signup and view all the answers

    What happens when an attribute is not part of the GROUP BY clause in a SQL query?

    <p>It results in an error</p> Signup and view all the answers

    Which category does SQL fall under?

    <p>Data manipulation language</p> Signup and view all the answers

    Which two organizations have approved SQL as a standard for decades?

    <p>ANSI and ISO</p> Signup and view all the answers

    Which two companies rely largely on solutions revolving around the SQL language?

    <p>Oracle and Microsoft</p> Signup and view all the answers

    What are the four components of the LAMP stack?

    <p>Linux, Apache, MySQL, PHP</p> Signup and view all the answers

    What is the acronym for the style of applications that involve Create, Read, Update, and Delete operations?

    <p>CRUD</p> Signup and view all the answers

    Which statement accurately describes the UPDATE command in SQL?

    <p>The UPDATE command is used to make changes to rows or records in a specific table.</p> Signup and view all the answers

    What is the main purpose of SQL-on-Hadoop tools?

    <p>To enable organizations to use SQL as a querying language and develop batch processing applications.</p> Signup and view all the answers

    What is the main security vulnerability associated with SQL servers?

    <p>SQL injection</p> Signup and view all the answers

    Which of the following roles can benefit from SQL experience?

    <p>All of the above</p> Signup and view all the answers

    Which of the following is true about SQL?

    <p>SQL is a programming language for relational databases</p> Signup and view all the answers

    What is the purpose of normalization in SQL database design?

    <p>To reduce duplication of data</p> Signup and view all the answers

    Which of the following is NOT a characteristic of a relational database?

    <p>Data is stored in a hierarchical structure</p> Signup and view all the answers

    What is the purpose of the ORDER BY clause in SQL?

    <p>To sort the result set in ascending or descending order</p> Signup and view all the answers

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