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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Database Fundamentals | 20% | - Data Normalization - Data Models (Relational, NoSQL, etc.) - Database Concepts and Architecture - CAP Theorem - ACID Properties - Database Design Principles |
| Topic 2: Database Implementation | 22% | - Stored Procedures and Functions - Triggers - SQL DDL Statements - Data Import/Export - Database Objects (Tables, Views, Indexes) - Data Types and Constraints |
| Topic 3: Database Support, Maintenance & Optimization | 20% | - Patch Management - Database Security (Users, Roles, Permissions) - Query Optimization - Performance Monitoring - Backup and Recovery Procedures - Index Management |
| Topic 4: Data Analytics & Engineering | 19% | - Data Quality - Reporting Concepts - Data Warehousing Concepts - ETL Processes - Data Governance - Data Visualization Basics |
| Topic 5: Database Deployment & Planning | 19% | - Database Clustering - Disaster Recovery Planning - Replication Strategies - Capacity Planning - Database Server Requirements - High Availability Architecture |
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NEW QUESTION # 103
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?
Answer: B
Explanation:
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.
NEW QUESTION # 104
Which of the following is used to store product quantities on a table while ensuring the minimal amount of storage is consumed?
Answer: C
Explanation:
INTEGER data types efficiently store whole numbers like product quantities using minimal storage compared to floating-point types.
NEW QUESTION # 105
Which of the following would a database administrator monitor to gauge server health? (Choose two.)
Answer: A,C
Explanation:
The two factors that the database administrator should monitor to gauge server health are CPU usage and memory usage. CPU usage is the percentage of time that the processor (CPU) of the server is busy executing instructions or processes. CPU usage indicates how much workload the server can handle and how fast it can process requests. High CPU usage may affect the performance or availability of the server and cause delays or errors. Memory usage is the amount of physical memory (RAM) or virtual memory (swap space) that the server uses to store data or run applications. Memory usage indicates how much space the server has to store temporary or intermediate data or results. High memory usage may affect the performance or availability of the server and cause swapping or paging. The other options are either not relevant or not direct indicators of server health. For example, transaction logs are files that record the changes made by transactions on the database; network sniffer is a tool that captures and analyzes network traffic; domain controllers are servers that manage user authentication and authorization in a network; firewall traffic is the amount of data that passes through a firewall device or software.
NEW QUESTION # 106
Following a security breach, a database administrator needs to ensure users cannot change data unless a request is approved by the management team. Which of the following principles addresses this issue?
Answer: C
Explanation:
The principle that addresses this issue is least privilege. Least privilege is a security principle that states that users should only have the minimum level of access or permissions required to perform their tasks or roles.
By applying this principle, the administrator can ensure that users cannot change data unless they have been authorized by the management team through a request approval process. This prevents unauthorized or accidental modifications of data that may compromise its integrity or security. The other options are either opposite or unrelated to this principle. For example, open access means that users have unrestricted access to data; least resistance means that users have the easiest or most convenient access to data; elevated privilege means that users have higher or more permissions than they need. References: CompTIA DataSys+ Course Outline, Domain 4.0 Data and Database Security, Objective 4.1 Given a scenario, apply security principles and best practices for databases.
NEW QUESTION # 107
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: C
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. 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 # 108
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