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| Certification Vendor: | CompTIA |
|---|---|
| Exam Name: | CompTIA DataSys+ Certification Exam |
| Exam Number: | DS0-001 |
| Exam Price: | $390 USD (approximate; may vary by region) |
| Certificate Validity Period: | 3 years |
| Exam Format: | Performance-based questions, Multiple-choice |
| Available Languages: | Japanese, English |
| Passing Score: | 700 (on a scale of 100–900) |
| Exam Duration: | 90 minutes |
| Real Exam Qty: | Up to 90 questions |
| Related Certifications: | CompTIA Security+ CompTIA Data+ CompTIA Server+ |
| Recommended Training: | CompTIA CertMaster Learn DataSys+ Official DataSys+ Study Guide (DS0-001) |
| Exam Registration: | CompTIA Official Certification Page Pearson VUE Exam Registration |
| Sample Questions: | CompTIA DS0-001 Sample Questions |
| Exam Way: | Online proctored or in-person testing via Pearson VUE authorized test centers |
| Pre Condition: | No formal prerequisites; 2–3 years of experience in database administration is recommended. |
| Official Syllabus URL: | https://www.comptia.org/certifications/datasys |
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問題 #100
A database administrator needs to ensure that a newly installed corporate business intelligence application can access the company's transactional data. Which of the following tasks should the administrator perform first?
答案：C
解題說明：
The first task that the administrator should perform is to create a new service account exclusively for the business intelligence application. This will ensure that the application has the appropriate permissions and credentials to access the company's transactional data. The other options are either unnecessary, inefficient, or insecure. For example, building a separate data warehouse would require additional resources and time, setting up a nightly FTP data transfer would expose the data to potential breaches, sending the TNS names file would not guarantee that the application can connect to the database, and opening a new port on the database server would create a vulnerability for attackers. References: CompTIA DataSys+ Course Outline, Domain
2.0 Database Deployment, Objective 2.1 Given a scenario, install and configure database software and tools.
問題 #101
Which of the following cloud delivery models provides users with the highest level of flexibility regarding resource provisioning and administration?
答案：A
解題說明：
The cloud delivery model that provides users with the highest level of flexibility regarding resource provisioning and administration is IaaS. IaaS, or Infrastructure as a Service, is a cloud delivery model that provides users with access to virtualized computing resources, such as servers, storage, network, and operating systems, over the internet. Users can provision, configure, and manage these resources according to their needs and preferences, without having to worry about the maintenance or security of the physical infrastructure. IaaS offers users the most control and customization over their cloud environment, as well as the ability to scale up or down as needed. The other options are either different cloud delivery models or not related to cloud computing at all. For example, DBaaS, or Database as a Service, is a cloud delivery model that provides users with access to database management systems and tools over the internet; SaaS, or Software as a Service, is a cloud delivery model that provides users with access to software applications and services over the internet; PaaS, or Platform as a Service, is a cloud delivery model that provides users with access to development platforms and tools over the internet. Reference: CompTIA DataSys+ Course Outline, Domain 2.0 Database Deployment, Objective 2.1 Given a scenario, select an appropriate database deployment method.
問題 #102
Which of the following is the best way to migrate a large data load from one table to another, considering total time and blocking?
答案：C
解題說明：
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.
問題 #103
A database analyst notices a query statement is running slowly. Which of the following should the analyst review first?
答案：A
解題說明：
Missing indexes are a common cause of slow queries, as indexes improve data retrieval speed by allowing efficient searching within tables.
問題 #104
(An analyst in the United States configured a database server so it could be accessed remotely by users in Brazil and Canada. Users in Brazil can connect to the server, but users in Canada cannot connect to the server.
Which of the following is the reason for the issue?)
答案：A
解題說明：
The correct answer is B. The rule set was configured to allow specific IP addresses. CompTIA DataSys+ materials emphasize the importance of network security controls, particularly firewall rules and access control lists (ACLs), in regulating remote database access. In this scenario, the database server is reachable by users in Brazil but not by users in Canada, which strongly indicates that access is being selectively permitted rather than globally blocked.
Firewall rule sets are often configured using IP-based allowlists, where only approved IP addresses or IP ranges are permitted to establish a connection. If the analyst allowed the IP address range associated with Brazil but did not include the IP range used by Canadian users, connections from Canada would fail while Brazilian users would still have access. This behavior aligns precisely with selective rule-based access control, a common best practice highlighted in DataSys+ for reducing attack surfaces.
Option A is incorrect because if the perimeter network were rejecting remote connections entirely, users in Brazil would also be unable to connect. Option C is incorrect for the same reason: a firewall rule denying all connections would block access from all locations, not just Canada. Option D, server port security being disabled, would typically prevent all inbound connections to the database service, again affecting all users regardless of geography.
CompTIA DataSys+ stresses that troubleshooting connectivity issues requires identifying whether failures are global or location-specific. Location-specific failures are most commonly caused by misconfigured firewall rules, IP filtering, or regional access restrictions. In database environments that support remote access, DBAs must ensure that firewall rules are consistently applied to all authorized networks.
Therefore, the most accurate and verified explanation is that the rule set was configured to allow specific IP addresses, and the Canadian users' IP range was not included. This makes option B the correct answer.
問題 #105
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