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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Database Management and Maintenance | 25% | - Maintenance tasks
|
| Topic 2: Business Continuity | 12% | - Disaster recovery
|
| Topic 3: Database Deployment | 16% | - Planning and design
|
| Topic 4: Data and Database Security | 23% | - Protection mechanisms
|
| Topic 5: Database Fundamentals | 24% | - Scripting and programming
|
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NEW QUESTION # 105
A database administrator manages a database server that is running low on disk space. A lot of backup files are stored on the server's disks.
Which of the following is the best action for the administrator to take?
Answer: D
Explanation:
The best action for the administrator to take is to delete all the backup files that are not required by the backup retention policy. This will free up disk space on the server and also comply with the best practices for data backup and recovery. The backup retention policy defines how long the backup files should be kept and when they should be deleted or archived. The other options are either risky, inefficient, or impractical. For example, moving all the backup files to external disks would require additional hardware and time, deleting all the backup files containing data that is rated as classified would compromise data security and compliance, and deleting all the backup files except for the most recent one would limit the recovery options in case of a disaster. References: CompTIA DataSys+ Course Outline, Domain 5.0 Business Continuity, Objective 5.2 Given a scenario, implement backup and restoration of database management systems.
NEW QUESTION # 106
(Which of the following are ORM tools? Select two.)
Answer: B,C
Explanation:
The correct answers are C. Entity Framework and E. Hibernate. CompTIA DataSys+ defines Object- Relational Mapping (ORM) tools as software frameworks that allow developers to interact with relational databases using object-oriented programming concepts instead of writing raw SQL queries. ORM tools map database tables to application objects, rows to object instances, and columns to object attributes, simplifying database access and improving developer productivity.
Entity Framework is a widely used ORM tool in the Microsoft ecosystem, commonly paired with .NET applications. It enables developers to define data models in code and allows the framework to automatically generate SQL queries, manage relationships, and handle CRUD (Create, Read, Update, Delete) operations.
DataSys+ highlights ORM tools like Entity Framework as a way to reduce repetitive SQL coding while maintaining consistency and abstraction between application logic and the database layer.
Hibernate is a popular ORM framework used primarily in Java-based applications. Similar to Entity Framework, Hibernate manages database interactions by mapping Java objects to relational database structures. It handles SQL generation, transaction management, and caching, making it a core example of an ORM solution referenced in DataSys+ learning objectives.
Option A, PL/SQL, and option D, T-SQL, are procedural SQL languages, not ORM tools. They are used to write stored procedures, functions, and scripts that execute directly within the database. Option B, XML, is a data format used for data representation and exchange, not for object-relational mapping. Option F, PHP, is a general-purpose programming language that can use ORM tools but is not itself an ORM framework.
CompTIA DataSys+ emphasizes understanding the distinction between database languages, programming languages, and abstraction frameworks like ORMs. Entity Framework and Hibernate clearly fit the definition of ORM tools by bridging object-oriented applications and relational databases.
Therefore, the correct and fully verified answers are C and E.
NEW QUESTION # 107
A business analyst is using a client table and an invoice table to create a database view that shows clients who have not made purchases yet. Which of the following joins is most appropriate for the analyst to use to create this database view?
Answer: B
Explanation:
The join that is most appropriate for the analyst to use to create this database view is option D. This join uses the LEFT JOIN clause to combine the client table and the invoice table based on the matching values in the Key column. The WHERE clause filters out the rows where the Invoice.Key column is not null, meaning that the client has made a purchase. The result is a view that shows only the clients who have not made any purchases yet. The other options either do not produce the desired result or have syntax errors. For example, option A would show only the clients who have made purchases, option B would show only the invoices that do not have a matching client, and option C would show all the clients regardless of their purchase status. References: CompTIA DataSys+ Course Outline, Domain 1.0 Database Fundamentals, Objective 1.2 Given a scenario, execute database tasks using scripting and programming languages.
NEW QUESTION # 108
Which of the following is most likely to prevent tampering with server hardware that houses data?
Answer: D
Explanation:
The option that is most likely to prevent tampering with server hardware that houses data is biometric locks.
Biometric locks are devices that use biological characteristics, such as fingerprints, facial recognition, iris scan, etc., to control access to a physical location or resource. Biometric locks help prevent tampering with server hardware that houses data by restricting unauthorized entry or theft of the hardware by intruders or attackers. Biometric locks also provide higher security and convenience than other types of locks, such as keys or passwords, which can be lost, stolen, or forgotten. The other options are either not related or not effective for this purpose. For example, a strong password policy is a set of rules or standards for creating and managing passwords for user accounts or systems; a network firewall is a device or software that controls the incoming and outgoing traffic on a network based on a set of rules or policies; surveillance cameras are devices that capture and record video footage of a physical location or resource. References: CompTIA DataSys+ Course Outline, Domain 4.0 Data and Database Security, Objective 4.2 Given a scenario, implement security controls for databases.
NEW QUESTION # 109
Which of the following statements best classifies a rollback in a database?
Answer: D
Explanation:
A rollback is a Transaction Control Language (TCL) command used to undo changes made during a transaction, ensuring database integrity by reverting to a previous stable state.
NEW QUESTION # 110
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