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NEW QUESTION # 21
Which of the following offers a DBA the ability to gather important performance metrics to help optimize SQL queries and parameters for a database instance?
Answer: D
Explanation:
Database monitoring provides performance metrics and insights that help a DBA identify bottlenecks and optimize SQL queries and parameters for better performance.
NEW QUESTION # 22
A systems analyst receives an error report and wants to quickly switch the rows to columns in order to match the format required for analysis. Which of the following spreadsheet functions should the analyst use to make this change?
Answer: B
Explanation:
The Transpose function switches rows to columns (or vice versa), enabling quick reformatting of data for analysis.
NEW QUESTION # 23
A database administrator has been asked to assign a user the ability to view a data set. Which of the following practices best describes this request?
Answer: D
Explanation:
The practice that best describes this request is access control. Access control is a process that regulates who can access what data in a system based on predefined rules or policies. Access control helps protect data from unauthorized or inappropriate access or modification by granting or denying permissions or privileges to users or groups based on their roles or identities. By applying access control, the database administrator can assign a user the ability to view a data set without allowing them to change or delete it. The other options are either different practices or not related to this request. For example, security audit is a process that evaluates the security level of a system by identifying vulnerabilities or risks; database audit is a process that monitors and records the activities or events that occur on a database; password policy implementation is a process that defines and enforces rules or standards for creating and managing passwords.
NEW QUESTION # 24
(Before installing a new database instance for an organization, a DBA needs to verify the amount of space, the hardware, and the network resources. Which of the following best describes this process?)
Answer: A
Explanation:
The correct answer is C. Checking for database prerequisites. According to CompTIA DataSys+ objectives, verifying prerequisites is a critical preparatory step before installing a new database instance.
Database prerequisites refer to the minimum and recommended requirements that must be met to ensure a successful installation and stable operation of the database system.
This process typically includes validating disk space availability, CPU capacity, memory (RAM), and network resources, as well as confirming operating system compatibility, required libraries, kernel parameters, and supporting services. DataSys+ emphasizes that failure to meet prerequisites can lead to installation errors, poor performance, instability, or security vulnerabilities after deployment. Therefore, DBAs are expected to thoroughly assess the environment before proceeding with installation.
Option A, performing patch management, refers to applying updates and fixes to existing systems to address bugs or security issues. This occurs after software is installed and operational, not before a new database instance is deployed. Option B, upgrading the database instance, involves moving from one version of a database to another and assumes an existing installation is already in place. Option D, provisioning the configuration, focuses on allocating and configuring resources (such as creating instances, users, or storage structures) after prerequisites have been validated.
CompTIA DataSys+ clearly separates environment validation from deployment and configuration activities. Checking prerequisites is a risk-reduction step that ensures the infrastructure can support the database workload and performance expectations from the start. It also supports capacity planning, compliance, and long-term maintainability.
Therefore, the process of verifying space, hardware, and network resources before installing a database instance is best described as checking for database prerequisites, making option C the correct and fully verified answer.
NEW QUESTION # 25
A database administrator wants to remove inactive customers from a database. Which of the following statements should the administrator use?
Answer: D
Explanation:
The statement that the administrator should use to remove inactive customers from a database is option A. This statement uses the DELETE command to delete all the rows from the customer table where the status column is equal to 'inactive'. The other options either have syntax errors, use incorrect commands, or do not specify the condition correctly. Reference: 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 # 26
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