Database Concepts: Security and Integrity
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Questions and Answers

What does data security refer to?

  • Checking data correctness
  • Quality assurance of data
  • Data completeness
  • Protection of data from unauthorized access (correct)
  • Data integrity ensures that data is accessed by its intended users.

    False

    What is a foreign key?

    A primary key appearing in another table.

    Data integrity refers to the _____ of data.

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

    Which of the following is NOT a means of preserving data integrity?

    <p>User authentication</p> Signup and view all the answers

    Give an example of a domain constraint.

    <p>NOT NULL</p> Signup and view all the answers

    Domain constraints allow for any value to be set for an attribute.

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

    Which statement about referential integrity is true?

    <p>It allows primary keys from one table to appear as foreign keys in another.</p> Signup and view all the answers

    Match the following concepts with their definitions:

    <p>Data Security = Protection against unauthorized access Data Integrity = Assurance of data accuracy and consistency Domain Constraint = Restriction on the type of data in a field Referential Integrity = Ensuring relationships between tables are maintained</p> Signup and view all the answers

    Study Notes

    Data Security vs Data Integrity

    • Data security focuses on preventing unauthorized access to data.
    • Data integrity focuses on ensuring the accuracy and consistency of data within a database.
    • Data security mechanisms prevent corruption, while data integrity mechanisms ensure completeness and structural soundness.
    • Data security protects data from unauthorized users, while data integrity verifies data accuracy and consistency.

    Domain Constraints

    • Domain constraints define the acceptable values for an attribute in a table.
    • A domain constraint specifies a data type and adds constraints like NOT NULL, UNIQUE, PRIMARY KEY, FOREIGN KEY, CHECK, and DEFAULT.
    • Domain constraints ensure the integrity of data by limiting the range of values allowed in specific columns.

    Referential Integrity

    • Referential integrity describes the relationships between tables through primary keys and foreign keys.
    • A primary key uniquely identifies a row in a table and can be used as a foreign key in another table to link data.
    • Foreign keys establish dependencies between tables, meaning that changes or deletions in one table can affect data in another table.
    • Referential integrity ensures data consistency by maintaining the relationships between tables.

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    Related Documents

    Integrity and Security.pdf

    Description

    Explore the critical differences between data security and data integrity in databases. This quiz covers domain constraints and referential integrity, highlighting how these concepts work together to protect and verify data accuracy. Test your knowledge on the mechanisms and relationships that ensure robust database management.

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