Pass the CompTIA CompTIA DataSys+ DS0-001 Questions and answers with CertsForce

The two resources that are best for monitoring potential server issues 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, user connections are the number of users who are connected to a database server at any given time; firewall usage is the amount of data that passes through a firewall device or software; index usage is the frequency or efficiency of using indexes on tables to speed up queries; query execution is the process of running SQL statements on a database server. References: CompTIA DataSys+ Course Outline, Domain 3.0 Database Management and Maintenance, Objective 3.2 Given a scenario, monitor database performance.

The command that the database administrator should use for this task is CREATE USER. The CREATE USER command is a SQL statement that creates a new user account in a database and assigns it a username and a password. The CREATE USER command also allows the database administrator to specify other options or attributes for the user account, such as default tablespace, quota, profile, role, etc. The CREATE USER command is the first step to enable a user to authenticate to a database. The other options are either invalid or not suitable for this task. For example, INSERT USER is not a valid SQL command; ALLOW USER is not a SQL command, but a keyword used in some database systems to grant permissions to users; ALTER USER is a SQL command that modifies an existing user account, but does not create a new one. References: CompTIA DataSys+ Course Outline, Domain 4.0 Data and Database Security, Objective 4.2 Given a scenario, implement security controls for databases.

The correct answer is B. 40%. CompTIA DataSys+ explains that Resource Governor is used to manage and allocate CPU and memory resources among multiple workloads or resource pools within a database system. When configuring resource pools, administrators must ensure that the total allocation of minimum resources does not exceed 100%, as all resource pools share the same finite system resources.

In this scenario, the first resource pool has a minimum CPU and memory allocation of 25%, and the second resource pool has a minimum allocation of 35%. Together, these minimum guarantees account for 60% of total available resources. Resource Governor enforces these minimums to ensure that critical workloads always receive their reserved share of system resources, even under heavy load.

The remaining resources are calculated by subtracting the total minimum allocation from 100%.

100% − 60% = 40%

This remaining 40% represents the maximum CPU and memory that can be safely assigned to the third resource pool without violating Resource Governor rules. Assigning a higher value would exceed the total available system resources and would not be permitted under proper configuration guidelines emphasized in DataSys+.

Option A (20%) underutilizes available resources and is unnecessarily restrictive. Option C (60%) and D (100%) are invalid because they would cause the combined minimum allocations to exceed system capacity, leading to misconfiguration or enforcement failures. DataSys+ stresses careful capacity planning when using Resource Governor to balance performance, fairness, and system stability.

Resource Governor is especially useful in multi-tenant or mixed-workload environments, where critical applications must be protected from resource starvation. Proper calculation of minimums and maximums ensures predictable performance and prevents one workload from monopolizing system resources.

Therefore, the correct maximum allocation for the third resource pool is 40%, making option B the correct and fully verified answer aligned with CompTIA DataSys+ guidance.

 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. References: CompTIA DataSys+ Course Outline, Domain 4.0 Data and Database Security, Objective 4.2 Given a scenario, implement security controls for databases.

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.

The ORM snippet that would return the ID, state, and country of all customers with the newest customers appearing first is option C. This snippet uses the select method to specify the columns to be returned, the order method to sort the results by ID in descending order, and the all method to fetch all the records. The other options either have syntax errors, use incorrect methods, or do not sort the results correctly. References: CompTIA DataSys+ Course Outline, Domain 1.0 Database Fundamentals, Objective 1.2 Given a scenario, execute database tasks using scripting and programming languages.

The correct answer is A. Creating views to support repeat queries. CompTIA DataSys+ emphasizes that views are an effective way to improve performance, usability, and consistency when users frequently run complex queries against live production tables. A view is a virtual table based on a predefined SQL query that presents data in a simplified and reusable format without physically storing the data.

When analysts run complex queries directly against live tables, it can increase CPU usage, I/O operations, and locking contention, potentially impacting other users and critical workloads. By creating views, the database administrator can encapsulate complex joins, filters, and aggregations into a single logical object. Analysts can then query the view instead of repeatedly executing expensive SQL statements. This reduces query complexity, improves readability, and can lead to more predictable performance. DataSys+ highlights views as a best practice for supporting reporting and analytical workloads while minimizing disruption to transactional systems.

Option B, removing data redundancy, is related to normalization and data integrity, not query performance optimization for analysts. Option C, modifying the data in the table, risks data integrity issues and does not address performance concerns. Option D, deleting records from the table, may reduce table size but is not an appropriate or safe method for improving user query performance and can result in data loss.

CompTIA DataSys+ also notes that views can enhance security by limiting analysts’ access to only the required columns or rows, further protecting live data. In some implementations, indexed or materialized views can offer additional performance benefits for repeated queries.

Therefore, the best solution to improve analyst performance when running complex, repeat queries on live tables is creating views to support repeat queries, making option A the correct and fully verified answer.

The first thing that the database administrator should examine to troubleshoot the issue is the event log. The event log is a file that records the events and activities that occur on a system, such as database backups, errors, warnings, or failures. By examining the event log, the administrator can identify the cause and time of the backup failure, and also check for any other issues or anomalies that may affect the backup process or the backup quality. The other options are either not relevant or not the first priority for this task. For example, CPU usage, disk space, and OS performance may affect the performance or availability of the system, but not necessarily cause the backup failure; moreover, these factors can be checked after reviewing the event log for more information. References: CompTIA DataSys+ Course Outline, Domain 5.0 Business Continuity, Objective 5.2 Given a scenario, implement backup and restoration of database management systems.

The correct answer is B. Rights and privileges. CompTIA DataSys+ clearly distinguishes between different categories of security controls, and access to shared resources such as folders is governed primarily by authorization mechanisms, specifically rights and privileges. In this scenario, access is restricted so that only authorized users can view or modify the shared folder, which directly reflects the enforcement of permissions.

Rights and privileges define what actions an authenticated user is allowed to perform on a system or resource. For shared folders, this typically includes read, write, modify, or full control permissions assigned to users or groups. DataSys+ emphasizes the principle of least privilege, which ensures users are granted only the minimum level of access required to perform their job functions. Applying appropriate rights and privileges protects sensitive data from unauthorized access and accidental modification.

Option A, password policies, control how passwords are created and managed, such as complexity, expiration, and reuse rules. While password policies help verify a user’s identity during authentication, they do not determine which resources a user can access after logging in. Option C, service accounts, are specialized non-human accounts used by applications or services and are unrelated to user access to shared folders. Option D, firewall policy, controls network-level traffic and determines which connections are allowed or blocked between systems, not access to files or folders once a connection is established.

CompTIA DataSys+ materials emphasize that security is layered, with authentication confirming identity and authorization enforcing access. In this case, users are already authenticated, and the restriction applies at the resource level. That makes rights and privileges the relevant control.

Therefore, the policy applied to ensure only authorized users can access the shared folder is rights and privileges, making option B the correct and fully verified answer.

The factor that the administrator should measure to analyze a database server’s disk throughput is IOPS. IOPS, or Input/Output Operations Per Second, is a metric that measures the number of read and write operations that a disk can perform in one second. IOPS indicates the performance or speed of a disk and how well it can handle multiple requests or transactions. Higher IOPS means higher disk throughput and lower latency. IOPS can be affected by various factors, such as disk type, size, speed, cache, RAID level, etc. The other options are either not related or not sufficient for this purpose. For example, RPfvl is not a valid acronym or metric; latency is the time delay between a request and a response; reads are the number of read operations performed by a disk. References: CompTIA DataSys+ Course Outline, Domain 3.0 Database Management and Maintenance, Objective 3.2 Given a scenario, monitor database performance.