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NEW QUESTION # 76
Which of the following is a reason to create a stored procedure?
Answer: D
Explanation:
A reason to create a stored procedure is to improve performance. A stored procedure is a set of SQL statements or commands that are stored and compiled in the database server, and can be executed by name or by a trigger. A stored procedure can improve performance by reducing the network traffic between the client and the server, as only the name or the parameters of the stored procedure need to be sent, rather than the entire SQL code. A stored procedure can also improve performance by reusing the same execution plan, as the stored procedure is compiled only once and cached in the server memory. The other options are either not true or not relevant for this purpose. For example, a stored procedure does not necessarily minimize storage space, as it still occupies space in the database server; a stored procedure does not bypass case sensitivity requirements, as it still follows the rules of the database system; a stored procedure does not give control of the query logic to the user, as it is defined and maintained by the database administrator or developer. References: CompTIA DataSys+ Course Outline, Domain 2.0 Database Deployment, Objective 2.2 Given a scenario, create database objects using scripting and programming languages.
NEW QUESTION # 77
Which of the following is the best way to migrate a large data load from one table to another, considering total time and blocking?
Answer: D
Explanation:
The best way to migrate a large data load from one table to another, considering total time and blocking, is to batch into small loads and run in parallel. This means that the large data load is divided into smaller chunks that can be processed simultaneously by multiple threads or processes. This reduces the total time required for the migration and also minimizes the blocking of other operations on the tables involved. The other options are either less efficient or more prone to blocking. For example, splitting the load size into many transactions may increase the overhead and latency of each transaction; splitting the load size in half and running simultaneously may still cause blocking or contention; batching large loads into one transaction may take longer and lock the tables for longer periods. Reference: CompTIA DataSys+ Course Outline, Domain 3.0 Database Management and Maintenance, Objective 3.3 Given a scenario, migrate data between databases.
NEW QUESTION # 78
Which of the following DR techniques uses a disk to update content in parallel with the main disk so a real-time backup is available?
Answer: D
Explanation:
Mirroring maintains a real-time copy of data by writing simultaneously to a secondary disk, ensuring an up-to-date backup is always available.
NEW QUESTION # 79
Which of the following would a database administrator monitor to gauge server health? (Choose two.)
Answer: D,E
Explanation:
The two factors that the database administrator should monitor to gauge server health are CPU usage and memory usage. CPU usage is the percentage of time that the processor (CPU) of the server is busy executing instructions or processes. CPU usage indicates how much workload the server can handle and how fast it can process requests. High CPU usage may affect the performance or availability of the server and cause delays or errors. Memory usage is the amount of physical memory (RAM) or virtual memory (swap space) that the server uses to store data or run applications. Memory usage indicates how much space the server has to store temporary or intermediate data or results. High memory usage may affect the performance or availability of the server and cause swapping or paging. The other options are either not relevant or not direct indicators of server health. For example, transaction logs are files that record the changes made by transactions on the database; network sniffer is a tool that captures and analyzes network traffic; domain controllers are servers that manage user authentication and authorization in a network; firewall traffic is the amount of data that passes through a firewall device or software. Reference: CompTIA DataSys+ Course Outline, Domain 3.0 Database Management and Maintenance, Objective 3.2 Given a scenario, monitor database performance.
NEW QUESTION # 80
(An IT manager needs to create a workflow for a new application. Which of the following tools should the manager use to facilitate the creation of a workflow?)
Answer: C
Explanation:
The correct answer is B. UML. CompTIA DataSys+ identifies Unified Modeling Language (UML) as a standard visual modeling tool used to design, document, and communicate system behavior, structure, and workflows during application development. UML is especially well-suited for creating workflows because it provides multiple diagram types that clearly represent processes, interactions, and control flow within an application.
Common UML diagrams used for workflow modeling include activity diagrams, which show step-by-step business or system processes, and sequence diagrams, which illustrate interactions between system components over time. These diagrams help stakeholders understand how users, systems, and data interact throughout an application's lifecycle. DataSys+ emphasizes that UML improves collaboration between technical and non-technical stakeholders by providing a clear, standardized visual representation of application logic and flow.
Option A, ERD (Entity Relationship Diagram), is used to model database structure, including entities, attributes, and relationships. While ERDs are essential for schema design, they do not describe application workflows or process logic. Option C, ETL (Extract, Transform, Load), refers to data integration processes used in data warehousing and analytics; it is not a design or modeling tool for application workflows. Option D, ORM (Object-Relational Mapping), is a programming abstraction layer that maps application objects to database tables and does not provide workflow visualization capabilities.
CompTIA DataSys+ highlights the importance of proper planning and design tools during application development. UML enables IT managers to map workflows before implementation, reducing development errors, improving maintainability, and ensuring that business requirements are met.
Therefore, the most appropriate tool for facilitating the creation of a workflow for a new application is UML, making option B the correct and fully verified answer.
NEW QUESTION # 81
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