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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Database Implementation | 22% | - Triggers - SQL DDL Statements - Database Objects (Tables, Views, Indexes) - Data Types and Constraints - Stored Procedures and Functions - Data Import/Export |
| Topic 2: Database Fundamentals | 20% | - Data Normalization - Data Models (Relational, NoSQL, etc.) - Database Concepts and Architecture - ACID Properties - CAP Theorem - Database Design Principles |
| Topic 3: Database Deployment & Planning | 19% | - Database Clustering - Capacity Planning - Replication Strategies - Disaster Recovery Planning - High Availability Architecture - Database Server Requirements |
| Topic 4: Database Support, Maintenance & Optimization | 20% | - Backup and Recovery Procedures - Patch Management - Performance Monitoring - Database Security (Users, Roles, Permissions) - Index Management - Query Optimization |
| Topic 5: Data Analytics & Engineering | 19% | - Data Warehousing Concepts - ETL Processes - Data Quality - Data Governance - Reporting Concepts - Data Visualization Basics |
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NEW QUESTION # 46
A business analyst queries the same few tables every quarter and does not want to write new SQL code every time. Which of the following would best support the business analyst's needs and allow the database administrator to optimize disk space?
Answer: A
NEW QUESTION # 47
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: C
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.
NEW QUESTION # 48
Which of the following describes the purpose of a snapshot?
Answer: A
Explanation:
The purpose of a snapshot is to create an image of a database. A snapshot is a copy of the state and content of a database at a specific point in time. A snapshot can be used for various purposes, such as backup and recovery, testing and development, reporting and analysis, etc. A snapshot can be created using various techniques, such as full copy, incremental copy, differential copy, etc. A snapshot can also be created using various tools or commands provided by the database system or software.
NEW QUESTION # 49
Which of the following is a potential issue raised by enterprise database users?
Answer: D
Explanation:
A potential issue raised by enterprise database users is the need for concurrent access and multiuser updates. Concurrent access means that multiple users can access the same data at the same time, while multiuser updates mean that multiple users can modify the same data at the same time. These features are essential for enterprise database users who need to share and collaborate on data in real time. However, they also pose challenges such as maintaining data consistency, preventing conflicts or errors, and ensuring transaction isolation and durability. The other options are either not issues or not specific to enterprise database users. For example, the need for multiple views or windows into the same database may be a preference or a convenience, but not an issue; the need to manage long transactions may be a challenge for any database user, not just enterprise ones; the need to manually transfer records to paper may be an outdated or inefficient practice, but not an issue.
NEW QUESTION # 50
Which of the following sets the age requirement for data that should be recovered after a major disaster?
Answer: A
Explanation:
The option that sets the age requirement for data that should be recovered after a major disaster is RPO. RPO, or Recovery Point Objective, is a metric that defines the maximum amount of data that can be lost or acceptable data loss in the event of a disaster or disruption. RPO indicates how frequently the data should be backed up or replicated to minimize the risk of data loss. RPO also sets the age requirement for data that should be recovered after a major disaster, as it determines how far back in time the recovery process should go. For example, if the RPO is one hour, then the data should be backed up or replicated every hour, and the recovery process should restore the data to the state it was in one hour before the disaster. The other options are either different metrics or not related to data recovery at all. For example, MTBF, or Mean Time Between Failures, is a metric that measures the average time that a system or component operates without failure; RTO, or Recovery Time Objective, is a metric that defines the maximum amount of time that can be taken to restore a system or service after a disaster or disruption; MTTF, or Mean Time To Failure, is a metric that measures the average time that a system or component operates until it fails. Reference: CompTIA DataSys+ Course Outline, Domain 5.0 Business Continuity, Objective 5.3 Given a scenario, implement backup and restoration of data.
NEW QUESTION # 51
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