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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Data and Database Security | 23% | - Attack types and defense measures - Infrastructure security and threat mitigation - Data security concepts and techniques - Governance, risk, and compliance - Authentication, authorization, and access control |
| Topic 2: Database Fundamentals | 24% | - Impact of programming on database operations - Scripting methods and environments - SQL development, modification, and execution - Database structure types and characteristics |
| Topic 3: Database Deployment | 16% | - Implementation, testing, and deployment phases - Migration and integration strategies - Database planning and design considerations |
| Topic 4: Business Continuity | 12% | - High availability and fault tolerance - Disaster recovery planning and strategies - Backup and restoration methods - RTO and RPO definitions and application |
| Topic 5: Database Management and Maintenance | 25% | - Performance monitoring and reporting - Data lifecycle management - Routine maintenance processes and tasks - Documentation and configuration management |
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NEW QUESTION # 42
A database's daily backup failed. Previous backups were completed successfully. Which of the following should the database administrator examine first to troubleshoot the issue?
Answer: A
Explanation:
The first thing that the database administrator should examine to troubleshoot the issue is the event log. The event log is a file that records the events and activities that occur on a system, such as database backups, errors, warnings, or failures. By examining the event log, the administrator can identify the cause and time of the backup failure, and also check for any other issues or anomalies that may affect the backup process or the backup quality. The other options are either not relevant or not the first priority for this task. For example, CPU usage, disk space, and OS performance may affect the performance or availability of the system, but not necessarily cause the backup failure; moreover, these factors can be checked after reviewing the event log for more information. References: CompTIA DataSys+ Course Outline, Domain 5.0 Business Continuity, Objective 5.2 Given a scenario, implement backup and restoration of database management systems.
NEW QUESTION # 43
Which of the following is the preferred data structure for storing hierarchical data models?
Answer: A
Explanation:
A tree data structure is ideal for representing hierarchical data models, as it organizes data in parent-child relationships.
NEW QUESTION # 44
A database administrator wants to remove inactive customers from a database. Which of the following statements should the administrator use?
Answer: C
Explanation:
The statement that the administrator should use to remove inactive customers from a database is option A.
This statement uses the DELETE command to delete all the rows from the customer table where the status column is equal to 'inactive'. The other options either have syntax errors, use incorrect commands, or do not specify the condition 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 # 45
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: B
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 # 46
Which of the following would a database administrator monitor to gauge server health? (Choose two.)
Answer: D,F
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. References: CompTIA DataSys+ Course Outline, Domain 3.0 Database Management and Maintenance, Objective 3.2 Given a scenario, monitor database performance.
NEW QUESTION # 47
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