Database Administration and Security
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Questions and Answers

What must be done to allow a login to access database objects?

  • The login must be mapped to a database user. (correct)
  • The login must not be connected to a SQL Server instance.
  • The login must have SQL Server Management Studio installed.
  • The login must have a direct privilege assigned.

    • Which command is used to provide privileges to users on database objects?

  • REVOKE
  • ALTER
  • EXECUTE
  • GRANT (correct)

    • What is the purpose of the REVOKE command in database security?

  • To add new privileges to an existing user.
  • To create a new user in the database.
  • To log in to the SQL Server instance.
  • To remove privileges from a specific user. (correct)

    • If a user is not mapped to any database user, what can they do?

    <p>Connect to SQL Server but cannot access objects.</p> Signup and view all the answers

    What type of database objects can access privileges be assigned to?

    <p>All database objects.</p> Signup and view all the answers

    What must be done for a user to modify data in a database?

    <p>They must be granted appropriate rights in the database.</p> Signup and view all the answers

    Which statement about database users and owners is correct?

    <p>Every object has a single owner.</p> Signup and view all the answers

    Which of the following is a requirement for a user to access objects in a database?

    <p>They must have a mapped login to a database user.</p> Signup and view all the answers

    What is the primary responsibility of a Database Administrator (DBA)?

    <p>Facilitating the development and use of the database</p> Signup and view all the answers

    Which of the following is NOT a typical privilege granted to users in a database?

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

    What does the term 'roles' refer to in the context of a database?

    <p>A named collection of database access privileges</p> Signup and view all the answers

    In organizations without a Data Administrator (DA), which responsibilities are often taken over by the DBA?

    <p>A mix of administrative and technical skills</p> Signup and view all the answers

    What is the first step in setting up security for a database?

    <p>Authentication and Authorization</p> Signup and view all the answers

    Which of these options best describes the role of the Data Administrator (DA)?

    <p>Oversees business and technical data needs</p> Signup and view all the answers

    Which database object is commonly manipulated using SQL privileges?

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

    How do Database Administrators (DBA) generally support end-users?

    <p>Monitoring distribution and use of data</p> Signup and view all the answers

    What is the primary role of a Data Administrator (DA)?

    <p>Control overall corporate data resources</p> Signup and view all the answers

    Which activity is NOT typically the responsibility of a Database Administrator (DBA)?

    <p>Establishing corporate data policies</p> Signup and view all the answers

    What is essential for the protection of the database according to the roles discussed?

    <p>Implementing effective security measures</p> Signup and view all the answers

    Which of the following concepts is NOT part of SQL security?

    <p>Data retrieval methods</p> Signup and view all the answers

    What is the main purpose of security measures from a DBA's perspective?

    <p>To prevent unauthorized access and data loss</p> Signup and view all the answers

    What is a consequence of not implementing security measures in a database management system?

    <p>Loss, corruption, or mishandling of data</p> Signup and view all the answers

    Who builds the logical model of the database before it is implemented by the DBA?

    <p>The Data Administrator (DA)</p> Signup and view all the answers

    Which role is concerned with maintaining a successful database environment?

    <p>Database Administrator (DBA)</p> Signup and view all the answers

    What command is used to create a new user under the myDB database?

    <p>CREATE USER user1 FOR LOGIN newlogin_name</p> Signup and view all the answers

    What happens when attempting to execute 'ALTER LOGIN newlogin_name WITH PASSWORD = Newpassword'?

    <p>It displays an error due to incorrect credentials.</p> Signup and view all the answers

    Which statement correctly describes the purpose of roles in database management?

    <p>Roles help manage sets of privileges efficiently.</p> Signup and view all the answers

    How can you remove the updating privilege from user1?

    <p>REVOKE UPDATE ON [Names] FROM user1</p> Signup and view all the answers

    What is the first step in checking the newly created login in SQL Server?

    <p>Open the Object Explorer and expand the security folder.</p> Signup and view all the answers

    After creating a new login, which command is necessary to update its name?

    <p>ALTER LOGIN login_name_test WITH NAME = newlogin_name</p> Signup and view all the answers

    Why might databases use roles rather than grant privileges to individual users?

    <p>It simplifies user management during updates.</p> Signup and view all the answers

    What is the effect of the command 'GRANT SELECT ON [Names] TO user1'?

    <p>It grants user1 permission to view records in the Names table.</p> Signup and view all the answers

    What is the primary function of the db_securityadmin fixed database role?

    <p>Manage role membership for custom roles</p> Signup and view all the answers

    Which fixed database role allows members to read all data from user tables?

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

    Which of the following roles would allow a user to add or remove access to the database for logins?

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

    What is a notable restriction of the db_denydatawriter fixed database role?

    <p>Members cannot add or modify data in user tables</p> Signup and view all the answers

    Which role is responsible for backing up the database?

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

    Which fixed database role has the ability to run any Data Definition Language (DDL) commands in a database?

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

    If a user belongs to the db_datawriter role, what actions can they perform?

    <p>Add, delete, or modify data in user tables</p> Signup and view all the answers

    Which fixed database role can potentially elevate their privileges?

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

    What is the primary function of the db_owner fixed-database role?

    <p>To perform configuration and maintenance activities</p> Signup and view all the answers

    Which role should a user be assigned if they should not read any data in the user tables?

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

    How can you assign a user the db_owner role in a SQL Server database?

    <p>USE myDB; ALTER ROLE db_owner ADD MEMBER user1</p> Signup and view all the answers

    What are user-defined database roles?

    <p>Roles created based on user preferences</p> Signup and view all the answers

    Which of the following is NOT a fixed-database role?

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

    What does the db_securityadmin role primarily allow users to do?

    <p>View and update the data in tables</p> Signup and view all the answers

    Which fixed-database role allows a user to drop the database?

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

    What is the consequence of granting the db_denydatareader role to a user?

    <p>The user cannot read any data</p> Signup and view all the answers

    Study Notes

    Database Administration and Security

    • Database security involves measures to protect databases from unauthorized access, service interruptions, and data loss.
    • Data Administrator (DA) manages overall corporate data resources (manual and computerized).
    • Database Administrator (DBA) maintains database environment, ensuring security, design, implementation, and maintenance.
    • DA determines database contents and boundaries; DBA manages physical structures.
    • DBA's tasks include designing, implementing, maintaining, and securing database structures.
    • DA and DBA roles can overlap; if no DA, DBA handles both functions.
    • DBA supports end-users, enforces policies, handles data backup/recovery, and monitors data usage.

    SQL Security Model

    • SQL security model specifies security restrictions enforced by the DBMS.
    • Users are people or processes with database access and unique IDs.
    • DBMS grants privileges for specific actions (e.g., SELECT, INSERT, DELETE, UPDATE) on database objects.
    • Objects are database entities like tables, rows, columns, indexes.
    • Privileges define user access rights to objects.
    • Roles are named collections of privileges authorizing database access.

    Database Users

    • Security setup involves authentication and authorization.
    • Users, groups, or processes access SQL server at either server or database levels.
    • Server-level includes logins and server roles; database-level includes users and database roles.

    Creating and Managing Logins

    • Login establishes connection to SQL Server.
    • Login must be mapped to a database user for database object access.
    • CREATE LOGIN command creates a new login with specific password.
    • ALTER LOGIN modifies login name or password.
    • Database object access requires proper login mappings and user privileges.

    Database Privileges

    • Authorization controls access to database objects.
    • Each object has an owner; privileges control modifications by other users.
    • GRANT command provides database object access privileges to users or roles.
    • REVOKE command removes database object access privileges from users or roles.

    Database Roles

    • Roles group privileges for efficient user management.
    • Roles streamline privilege assignment to multiple users.
    • Database-level roles are predefined and can be customized.
    • Predefined roles (e.g., db_owner, db_securityadmin) come with specific permissions.
    • Assign predefined or customized user roles for effective database access management.

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    Related Documents

    Database Administration and Security PDF

    Description

    This quiz covers the essential roles of Data Administrators (DA) and Database Administrators (DBA) in maintaining database security and resources. It also explores the SQL security model, including user privileges and data access management. Understand the overlapping responsibilities of DA and DBA for effective database governance.

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