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| Certification Vendor: | CompTIA |
|---|---|
| Exam Name: | CompTIA DataSys+ Certification Exam |
| Exam Number: | DS0-001 |
| Related Certifications: | CompTIA Data+ CompTIA Server+ CompTIA Security+ |
| Exam Price: | $390 USD (approximate; may vary by region) |
| Real Exam Qty: | Up to 90 questions |
| Exam Format: | Performance-based questions, Multiple-choice |
| Passing Score: | 700 (on a scale of 100–900) |
| Available Languages: | Japanese, English |
| Exam Duration: | 90 minutes |
| Certificate Validity Period: | 3 years |
| Recommended Training: | Official DataSys+ Study Guide (DS0-001) CompTIA CertMaster Learn DataSys+ |
| Exam Registration: | Pearson VUE Exam Registration CompTIA Official Certification Page |
| 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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NEW QUESTION # 54
Which of the following describes a scenario in which a database administrator would use a relational database rather than a non-relational database?
Answer: A
Explanation:
A scenario in which a database administrator would use a relational database rather than a non-relational database is when an organization wants to maintain consistency among the data in the database. A relational database is a type of database that organizes data into tables with predefined columns and rows, and enforces rules and constraints to ensure data integrity and accuracy. A relational database also supports transactions, which are sets of operations that must be executed as a whole or not at all, to prevent data corruption or inconsistency. The other options are either not exclusive to relational databases or not relevant to the choice of database type. For example, data encryption can be applied to both relational and non-relational databases, processing complex data sets may require specialized tools or techniques that are not dependent on the database type, and storing a large number of videos, photos, and documents may be better suited for a non-relational database that can handle unstructured or semi-structured data. Reference: CompTIA DataSys+ Course Outline, Domain 1.0 Database Fundamentals, Objective 1.1 Given a scenario, identify and apply database structure types.
NEW QUESTION # 55
A company wants to deploy a new application that will distribute the workload to five different database instances. The database administrator needs to ensure that, for each copy of the database, users are able to read and write data that will be synchronized across all of the instances.
Which of the following should the administrator use to achieve this objective?
Answer: D
Explanation:
The administrator should use peer-to-peer replication to achieve this objective. Peer-to-peer replication is a type of replication that allows data to be distributed across multiple database instances that are equal partners, or peers. Each peer can read and write data that will be synchronized across all peers. This provides high availability, scalability, and load balancing for the application. The other options are either not suitable for this scenario or do not support bidirectional data synchronization. For example, failover clustering provides high availability but does not distribute the workload across multiple instances; log shipping provides disaster recovery but does not allow writing data to secondary instances; availability groups provide high availability and read-only access to secondary replicas but do not support peer-to-peer replication. Reference: CompTIA DataSys+ Course Outline, Domain 5.0 Business Continuity, Objective 5.3 Given a scenario, implement replication of database management systems.
NEW QUESTION # 56
A new retail store employee needs to be able to authenticate to a database. Which of the following commands should a database administrator use for this task?
Answer: B
Explanation:
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.
NEW QUESTION # 57
Which of the following describes a lock that allows concurrent transactions to access different records of the same table?
Answer: A
Explanation:
A row-level lock permits multiple transactions to access different rows within the same table concurrently, improving concurrency and minimizing contention.
NEW QUESTION # 58
A database analyst notices a query statement is running slowly. Which of the following should the analyst review first?
Answer: D
Explanation:
Missing indexes are a common cause of slow queries, as indexes improve data retrieval speed by allowing efficient searching within tables.
NEW QUESTION # 59
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