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| Section | Weight | Objectives |
|---|---|---|
| Database Implementation | 22% | - Data Types and Constraints - Data Import/Export - Stored Procedures and Functions - Database Objects (Tables, Views, Indexes) - SQL DDL Statements - Triggers |
| Data Analytics & Engineering | 19% | - Data Visualization Basics - Data Quality - Data Governance - Data Warehousing Concepts - ETL Processes - Reporting Concepts |
| Database Support, Maintenance & Optimization | 20% | - Patch Management - Database Security (Users, Roles, Permissions) - Backup and Recovery Procedures - Query Optimization - Performance Monitoring - Index Management |
| Database Fundamentals | 20% | - Data Normalization - CAP Theorem - Database Concepts and Architecture - Data Models (Relational, NoSQL, etc.) - ACID Properties - Database Design Principles |
| Database Deployment & Planning | 19% | - Replication Strategies - Capacity Planning - Database Clustering - High Availability Architecture - Disaster Recovery Planning - Database Server Requirements |
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NEW QUESTION # 45
Which of the following is the deployment phase in which a DBA ensures the most recent patches are applied to the new database?
Answer: D
Explanation:
The deployment phase in which a DBA ensures the most recent patches are applied to the new database is upgrading. Upgrading is a process that updates an existing database system or software to a newer version or release that may include new features, enhancements, bug fixes, security patches, etc. Upgrading helps improve the performance, functionality, compatibility, and security of the database system or software. Upgrading can be done manually or automatically using tools or scripts provided by the vendor or developer. Upgrading can also involve testing, backup, migration, or rollback procedures to ensure the quality and reliability of the new version or release. The other options are either different deployment phases or not related to deployment at all. For example, importing is a process that transfers data from one source to another using files or formats; provisioning is a process that allocates resources such as servers, storage, network, etc., for a system or software; modifying is a process that changes existing data or objects in a database using commands or scripts.
NEW QUESTION # 46
A server administrator wants to analyze a database server's disk throughput. Which of the following should the administrator measure?
Answer: B
Explanation:
The factor that the administrator should measure to analyze a database server's disk throughput is IOPS.
IOPS, or Input/Output Operations Per Second, is a metric that measures the number of read and write operations that a disk can perform in one second. IOPS indicates the performance or speed of a disk and how well it can handle multiple requests or transactions. Higher IOPS means higher disk throughput and lower latency. IOPS can be affected by various factors, such as disk type, size, speed, cache, RAID level, etc. The other options are either not related or not sufficient for this purpose. For example, RPfvl is not a valid acronym or metric; latency is the time delay between a request and a response; reads are the number of read operations performed by a disk. References: CompTIA DataSys+ Course Outline, Domain 3.0 Database Management and Maintenance, Objective 3.2 Given a scenario, monitor database performance.
NEW QUESTION # 47
A database administrator realizes that certain data was not captured correctly when it was imported. Which of the following commands should the administrator use to fix the issue?
Answer: C
Explanation:
The UPDATE command allows the administrator to modify existing records in a table to correct data that was not captured correctly during import.
NEW QUESTION # 48
Which of the following is recommended in order to provide encrypted data communication pathways for information as it is transmitted over a network?
Answer: B
Explanation:
The option that is recommended in order to provide encrypted data communication pathways for information as it is transmitted over a network is TLS. TLS, or Transport Layer Security, is a protocol that provides secure communication over the internet by encrypting the data using cryptographic algorithms and keys. TLS also provides authentication and integrity by verifying the identity of the parties involved and ensuring that the data has not been altered or tampered with. TLS can be used to protect various types of data, such as web traffic, email, instant messaging, voice over IP, etc. The other options are either not related or not sufficient for this purpose. For example, TCP/IP, or Transmission Control Protocol/Internet Protocol, is a set of protocols that defines how data is transmitted and routed over the internet, but does not provide encryption or security; NFS, or Network File System, is a protocol that allows users to access and share files over a network, but does not provide encryption or security; SMB, or Server Message Block, is a protocol that allows users to access and share files, printers, and other resources over a network, but does not provide encryption or security. Reference: CompTIA DataSys+ Course Outline, Domain 4.0 Data and Database Security, Objective 4.2 Given a scenario, implement security controls for databases.
NEW QUESTION # 49
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: D
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.
NEW QUESTION # 50
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