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[General] 試験の準備方法-効果的なDS0-001模擬体験試験-ユニークなDS0-001資格問題対応

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【General】 試験の準備方法-効果的なDS0-001模擬体験試験-ユニークなDS0-001資格問題対応

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CompTIA DS0-001 認定試験の出題範囲：
トピック出題範囲
トピック 1
  • Database Deployment: In this topic, you'll find discussions on database planning and design aspects. It also focuses on the implementation, testing, and deployment phases of databases.
トピック 2
  • Data and Database Security: This topic focuses on data security concepts, governance and regulatory compliance purposes, implementing authentication and authorization policies and best practices. Additionally, the topic discusses database infrastructure security, and understanding types of attacks and their effects on data systems.
トピック 3
  • Database Management and Maintenance: Here, you'll learn about monitoring and reporting for database management and performance, common database maintenance processes, documentation production, and relevant tools usage. Lastly, the topic focuses on implementing data management tasks.
トピック 4
  • Database Fundamentals: This topic covers database structure types, SQL code development and modification based on scenarios, comparison of scripting methods and environments, and the impact of programming on database operations.
トピック 5
  • Business Continuity: Finally, this topic covers the importance of disaster recovery techniques. Moreover, the topic explains backup and restore best practices and processes.

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CompTIA DataSys+ Certification Exam 認定 DS0-001 試験問題 (Q36-Q41):質問 # 36
Which of the following database instances are created by default when SQL Server is installed?
(Choose two.)
  • A. Model
  • B. Log
  • C. View
  • D. Master
  • E. Root
  • F. Index
正解：A、D
解説：
The two database instances that are created by default when SQL Server is installed are master and model. Master is a system database that contains the information and settings of the SQL Server instance, such as the configuration, logins, endpoints, databases, etc. Master is essential for the operation and management of the SQL Server instance, and it should be backed up regularly. Model is a system database that serves as a template for creating new user databases.
Model contains the default settings and objects, such as tables, views, procedures, etc., that will be inherited by the new user databases. Model can be modified to customize the new user databases according to specific needs or preferences. The other options are either not database instances or not created by default when SQL Server is installed. For example, root is not a database instance, but a term that refers to the highest level of access or privilege in a system; log is not a database instance, but a file that records the changes made by transactions on a database; view is not a database instance, but an object that represents a subset or a combination of data from one or more tables; index is not a database instance, but a data structure that stores the values of one or more columns of a table in a sorted order.

質問 # 37
A database administrator would like to create a table named XYZ. Which of the following queries should the database administrator use to create the table?
  • A.
  • B.
  • C.
  • D.
正解：B
解説：
The query that the administrator should use to create the table is option B. This query uses the CREATE TABLE statement to define a new table named XYZ with three columns: ID, Name, and Age. Each column has a data type and a constraint, such as NOT NULL, PRIMARY KEY, or CHECK. The other options either have syntax errors, use incorrect keywords, or do not specify the table name or columns correctly. References: CompTIA DataSys+ Course Outline, Domain 1.0 Database Fundamentals, Objective
1.1 Given a scenario, identify and apply database structure types.

質問 # 38
A database administrator needs to aggregate data from multiple tables in a way that does not impact the original tables, and then provide this information to a department. Which of the following is the best way for the administrator to accomplish this task?
  • A. Create a function.
  • B. Create indexes on those tables
  • C. Create a new database.
  • D. Create a materialized view.
正解：D
解説：
The best way for the administrator to accomplish this task is to create a materialized view. A materialized view is a type of view that stores the result of a query on one or more tables as a separate table in the database. A materialized view can aggregate data from multiple tables in a way that does not impact the original tables, and then provide this information to a department as a single source of truth. A materialized view also improves query performance and efficiency by reducing the need to recompute complex queries every time they are executed. The other options are either not suitable or not optimal for this task. For example, creating indexes on those tables may improve query performance on individual tables, but not on aggregated data; creating a new database may require additional resources and maintenance, and may introduce inconsistency or redundancy; creating a function may require additional coding and execution, and may not store the result as a separate table. References: CompTIA DataSys+ Course Outline, Domain 2.0 Database Deployment, Objective 2.2 Given a scenario, create database objects using scripting and programming languages.

質問 # 39
A database system crashed during a routine migration process. Which of the following should the systems administrator refer to for guidance in this situation?
  • A. The database compliance policy
  • B. The continuity of operations policy
  • C. The access control policy
  • D. The data retention policy
正解：B
解説：
The continuity of operations policy provides guidelines and procedures for maintaining or restoring essential functions during and after disruptions like a database crash.

質問 # 40
A database administrator needs to ensure that a newly installed corporate business intelligence application can access the company's transactional dat a. Which of the following tasks should the administrator perform first?
  • A. Set up a nightly FTP data transfer from the database server to the business intelligence application server.
  • B. Open a new port on the database server exclusively for the business intelligence application.
  • C. Build a separate data warehouse customized to the business intelligence application's specifications.
  • D. Send the business intelligence administrator the approved TNS names file to configure the data mapping.
  • E. Create a new service account exclusively for the business intelligence application.
正解：E
解説：
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. Reference: CompTIA DataSys+ Course Outline, Domain 2.0 Database Deployment, Objective 2.1 Given a scenario, install and configure database software and tools.

質問 # 41
......
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