Oracle 12c User Management Quiz

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Questions and Answers

What is a schema in Oracle database?

  • A collection of objects owned by a database user (correct)
  • A set of predefined database roles
  • A type of database privilege
  • An authentication mechanism for users

What is the purpose of roles in Oracle database?

  • To group related privileges and simplify user management (correct)
  • To control database access
  • To define specific object-level access for users
  • To authenticate database users

What is the difference between system privileges and object privileges in Oracle database?

  • System privileges are granted to roles, while object privileges are granted to individual users
  • System privileges are for database administration tasks, while object privileges are for specific database objects (correct)
  • System privileges are granted at the schema level, while object privileges are granted at the database level
  • System privileges are for accessing database objects, while object privileges are for managing database users

What is the purpose of controlling database access in a multiple-user environment?

<p>To maintain security of database access and use (A)</p> Signup and view all the answers

How can privileges be confirmed in Oracle database?

<p>Using the Oracle data dictionary (D)</p> Signup and view all the answers

Relational databases store data in one-dimensional tables, true or false?

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

A relational database management system is built based on the hierarchical network model, true or false?

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

Data integrity is not a concern in relational databases, true or false?

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

Views and indexes are examples of structures in Oracle, true or false?

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

SELECT statements are examples of operations in relational databases, true or false?

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

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Study Notes

Relational Database Model

  • A relational database is a collection of relations or two-dimensional tables.
  • The relational model consists of three components:
    • A collection of objects or relations
    • A set of operators to act on the relations
    • Data integrity for accuracy and consistency

Evolution of Database Management Systems

  • Database management systems evolved from hierarchical and network models to relational database management systems (RDBMS).

Relational Database Management System (RDBMS)

  • An RDBMS is an organized model of subjects and characteristics that have relationships among the subjects.
  • RDBMS is a type of database management software built based on the relational model.

Characteristics of Relational Databases

  • Relational databases have three major characteristics:

Structures

  • Stores or accesses data from the database.
  • Examples of structures in Oracle include tables, views, and indexes.

Operations

  • Defines structures or manipulates data between structures.
  • Examples of operations include SELECT statements and CREATE statements.

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