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NEW QUESTION # 54
A database administrator must grant a manager access to all employee data but only grant employees access to their own information. Which of the following would best enable this requirement?
Answer: C
Explanation:
Row-based access control restricts users' access to specific rows in a database, allowing the manager to see all employee data while ensuring each employee can only access their own information.
NEW QUESTION # 55
Which of the following is a characteristic of all non-relational databases?
Answer: C
Explanation:
The characteristic of all non-relational databases is unstructured data. Unstructured data is data that does not have a predefined or fixed format, schema, or structure. Unstructured data can include various types of data, such as text, images, audio, video, etc. Non-relational databases, also known as NoSQL databases, are databases that store and manage unstructured data using different models, such as key-value, document, graph, columnar, etc. Non-relational databases are suitable for handling large volumes, variety, and velocity of data that do not fit well in the relational model. The other options are either characteristics of relational databases or not related to database types at all. For example, columns with the same data type, logical record groupings, and tabular schema are characteristics of relational databases, which are databases that store and manage structured data using tables, rows, columns, and constraints. References: CompTIA DataSys+ Course Outline, Domain 1.0 Database Fundamentals, Objective 1.1 Given a scenario, identify common database types.
NEW QUESTION # 56
Which of the following best describes the category of SQL commands required to revoke access to database objects?
Answer: A
Explanation:
The category of SQL commands that is required to revoke access to database objects is DCL. DCL, or Data Control Language, is a subset of SQL commands that are used to control or manage the access or permissions of users or roles on a database. DCL includes commands such as GRANT and REVOKE. GRANT is a DCL command that is used to grant privileges or roles to users or roles on specific objects in a database, such as tables, views, procedures, etc. REVOKE is a DCL command that is used to revoke privileges or roles from users or roles on specific objects in a database. For example, the following statement uses the REVOKE command to revoke the SELECT privilege from user Alice on table employee:
REVOKE SELECT ON employee FROM Alice;
The other options are either different categories of SQL commands or not related to SQL commands at all. For example, IDDL is not a valid acronym or category of SQL commands; IDML is not a valid acronym or category of SQL commands; TCL, or Transaction Control Language, is a subset of SQL commands that are used to control or manage transactions on a database, such as committing or rolling back changes. Reference: CompTIA DataSys+ Course Outline, Domain 4.0 Data and Database Security, Objective 4.2 Given a scenario, implement security controls for databases.
NEW QUESTION # 57
Which of the following database instances are created by default when SQL Server is installed? (Choose two.)
Answer: A,B
Explanation:
The two database instances that are created by default when SQL Server is installed are master and model. Master is a system database that contains the information and settings of the SQL Server instance, such as the configuration, logins, endpoints, databases, etc. Master is essential for the operation and management of the SQL Server instance, and it should be backed up regularly. Model is a system database that serves as a template for creating new user databases. Model contains the default settings and objects, such as tables, views, procedures, etc., that will be inherited by the new user databases. Model can be modified to customize the new user databases according to specific needs or preferences. The other options are either not database instances or not created by default when SQL Server is installed. For example, root is not a database instance, but a term that refers to the highest level of access or privilege in a system; log is not a database instance, but a file that records the changes made by transactions on a database; view is not a database instance, but an object that represents a subset or a combination of data from one or more tables; index is not a database instance, but a data structure that stores the values of one or more columns of a table in a sorted order. Reference: CompTIA DataSys+ Course Outline, Domain 2.0 Database Deployment, Objective 2.3 Given a scenario, update database systems.
NEW QUESTION # 58
(New users at a company are reporting that the system is not accepting new credentials when the users are asked to change the credentials for the first time. Which of the following is the reason the credentials are being rejected?)
Answer: D
Explanation:
The correct answer is D. Password policies. CompTIA DataSys+ emphasizes that password policies are a core component of authentication and security controls within database systems and enterprise environments.
When new users are required to change their credentials for the first time, the system typically enforces predefined password rules. If the new credentials do not meet these rules, the system will reject them automatically.
Password policies define specific requirements such as minimum password length, complexity (use of uppercase letters, lowercase letters, numbers, and special characters), password history, expiration intervals, and restrictions against using previously compromised or common passwords. In many environments, first- time password changes are subject to the strictest enforcement of these rules to ensure strong baseline security from the start of a user's lifecycle.
Option A, identity management, focuses on the creation, provisioning, and lifecycle management of user identities across systems. While identity management systems initiate the credential change process, they do not usually enforce the detailed rules that cause a password to be rejected. Option B, access controls, govern what resources a user can access after authentication, not whether a password itself is valid. Option C, service accounts, are non-interactive accounts used by applications or services and are unrelated to new end-user credential changes.
DataSys+ documentation highlights that authentication failures during credential updates are most commonly tied to policy enforcement, not permissions or account type. This includes scenarios where users unknowingly violate complexity rules or reuse default or temporary passwords that are explicitly disallowed.
Therefore, the rejection of new credentials during a first-time password change is best explained by password policies, making option D the most accurate and verified answer according to CompTIA DataSys+ principles.
NEW QUESTION # 59
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