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| Certification Vendor: | CompTIA |
|---|---|
| Exam Name: | CompTIA DataSys+ Certification Exam |
| Exam Number: | DS0-001 |
| Exam Price: | $252 USD |
| Related Certifications: | CompTIA Server+ CompTIA Network+ CompTIA A+ |
| Certificate Validity Period: | 3 years |
| Exam Format: | Performance-based, Multiple Choice |
| Exam Duration: | 90 minutes |
| Passing Score: | 750 (on a scale of 100-900) |
| Available Languages: | English |
| Real Exam Qty: | 90 |
| Sample Questions: | CompTIA DS0-001 Sample Questions |
| Exam Way: | Pearson VUE testing centers (both in-person and online proctored options may be available) |
| Pre Condition: | Recommended: CompTIA A+ or equivalent; 2 years of hands-on database experience; familiarity with SQL and database concepts |
| Official Syllabus URL: | https://www.comptia.org/certifications/datasys |
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NEW QUESTION # 53
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 # 54
Given the following customer table:
Which of the following ORM snippets would return the ID, state, and country of all customers with the newest customers appearing first?
Answer: D
Explanation:
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.
NEW QUESTION # 55
A database administrator needs to remove a redundant customer table from a database in order to streamline periodic reports. Which of the following commands is best for this task?
Answer: A
Explanation:
The DROP TABLE command permanently removes the entire customer table and its data from the database, streamlining reports and eliminating redundancy.
NEW QUESTION # 56
A company is launching a proof-of-concept, cloud-based application. One of the requirements is to select a database engine that will allow administrators to perform quick and simple queries on unstructured data.
Which of the following would be best suited for this task?
Answer: B
Explanation:
The best suited database engine for this task is MongoDB. MongoDB is a type of non-relational database that stores data as documents in JSON-like format. MongoDB allows administrators to perform quick and simple queries on unstructured data, such as text, images, videos, or social media posts, without requiring a predefined schema or complex joins. MongoDB also supports cloud-based deployment, scalability, and high availability. The other options are either relational databases that require a fixed schema and structure for data, or specialized databases that are designed for specific purposes, such as graph databases for storing and analyzing network data.
NEW QUESTION # 57
A database administrator is conducting a stress test and providing feedback to a team that is developing an application that uses the Entity Framework. Which of the following explains the approach the administrator should use when conducting the stress test?
Answer: A
Explanation:
The approach that the administrator should use when conducting the stress test is to capture business logic, check the performance of codes, and report findings. This will help the administrator to evaluate how well the application handles high volumes of data and transactions, identify any bottlenecks or errors in the code, and provide feedback to the development team on how to improve the application's efficiency and reliability. The other options are either too narrow or too broad in scope, and do not address the specific needs of an application that uses the Entity Framework.
NEW QUESTION # 58
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