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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Database Management and Maintenance | 25% | - Routine maintenance processes and tasks - Documentation and configuration management - Data lifecycle management - Performance monitoring and reporting |
| Topic 2: Data and Database Security | 23% | - Attack types and defense measures - Infrastructure security and threat mitigation - Governance, risk, and compliance - Authentication, authorization, and access control - Data security concepts and techniques |
| Topic 3: Database Deployment | 16% | - Migration and integration strategies - Database planning and design considerations - Implementation, testing, and deployment phases |
| Topic 4: Business Continuity | 12% | - Backup and restoration methods - High availability and fault tolerance - RTO and RPO definitions and application - Disaster recovery planning and strategies |
| Topic 5: Database Fundamentals | 24% | - Database structure types and characteristics - SQL development, modification, and execution - Impact of programming on database operations - Scripting methods and environments |
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NEW QUESTION # 33
A database administrator is updating an organization's ERD. Which of the following is the best option for the database administrator to use?
Answer: D
Explanation:
The best option for the database administrator to use to update an organization's ERD is a UML tool. A UML tool is a software application that allows users to create, edit, and visualize diagrams using the Unified Modeling Language (UML). UML is a standard language for modeling software systems and their components, such as classes, objects, relationships, behaviors, etc. UML can also be used to create entity relationship diagrams (ERDs), which are graphical representations of the entities (tables), attributes (columns), and relationships (constraints) in a database. A UML tool can help the administrator to update an organization's ERD by providing features such as drag-and-drop, templates, symbols, validation, etc. The other options are either not suitable or not optimal for this task. For example, a word processor is a software application that allows users to create and edit text documents; a spreadsheet is a software application that allows users to organize and manipulate data in rows and columns; an HTML editor is a software application that allows users to create and edit web pages using HyperText Markup Language (HTML). Reference: CompTIA DataSys+ Course Outline, Domain 2.0 Database Deployment, Objective 2.2 Given a scenario, create database objects using scripting and programming languages.
NEW QUESTION # 34
A database administrator is new to a company and wants to create a document that illustrates the interaction between tables. Which of the following should the administrator create?
Answer: B
Explanation:
The document that the administrator should create to illustrate the interaction between tables is an entity relationship diagram. An entity relationship diagram (ERD) is a graphical representation of the entities (tables), attributes (columns), and relationships (constraints) in a database. An ERD helps the administrator to visualize the structure and design of the database, as well as the dependencies and associations among the tables. The other options are either different types of documents or not related to the interaction between tables. For example, a troubleshooting guide is a document that provides instructions on how to solve common problems or errors in a database; a data dictionary is a document that describes the metadata (information about data) of a database; a database reference manual is a document that provides information on how to use or operate a database. References: CompTIA DataSys+ Course Outline, Domain 2.0 Database Deployment, Objective 2.2 Given a scenario, create database objects using scripting and programming languages.
NEW QUESTION # 35
As part of an integrity check, a database administrator is creating both the primary and secondary snapshots. The database administrator notices the primary replica is failing over to the secondary replica. Which of the following describes how this will affect the database?
Answer: A
Explanation:
Failover from a primary to a secondary replica in a properly configured environment is designed to be seamless, maintaining database availability and integrity without impacting operations.
NEW QUESTION # 36
A database administrator is migrating the information in a legacy table to a newer table. Both tables contain the same columns, and some of the data may overlap.
Which of the following SQL commands should the administrator use to ensure that records from the two tables are not duplicated?
Answer: A
Explanation:
The SQL command that the administrator should use to ensure that records from the two tables are not duplicated is option A. This command uses the UNION clause to combine the records from the legacy table and the newer table into a single result set. The UNION clause also eliminates any duplicate records that may exist in both tables, and sorts the result by default. The other options either do not produce the desired result or have syntax errors. For example, option B would join the records from the two tables based on a common column, but not remove any duplicates; option C would return only the records that are common to both tables, but not the ones that are unique to each table; option D would produce a Cartesian product of the records from the two tables, which would increase the number of duplicates. References: CompTIA DataSys+ Course Outline, Domain 1.0 Database Fundamentals, Objective 1.2 Given a scenario, execute database tasks using scripting and programming languages.
NEW QUESTION # 37
Which of the following is a characteristic of all non-relational databases?
Answer: A
Explanation:
The characteristic of all non-relational databases is unstructured data. Unstructured data is data that does not have a predefined or fixed format, schema, or structure. Unstructured data can include various types of data, such as text, images, audio, video, etc. Non-relational databases, also known as NoSQL databases, are databases that store and manage unstructured data using different models, such as key-value, document, graph, columnar, etc. Non-relational databases are suitable for handling large volumes, variety, and velocity of data that do not fit well in the relational model. The other options are either characteristics of relational databases or not related to database types at all. For example, columns with the same data type, logical record groupings, and tabular schema are characteristics of relational databases, which are databases that store and manage structured data using tables, rows, columns, and constraints.
NEW QUESTION # 38
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