View Full CompTIA DataSys+ DS0-001 Exam Dumps and Practice Test Dumps   Question 301. A database administrator needs to reduce the risk of data loss when an application accidentally deletes a large number of rows and the deletion is immediately replicated to all standby systems. Which control is MOST important? Maintain independent, tested backups that […]

View Full CompTIA DataSys+ DS0-001 Exam Dumps and Practice Test Dumps   Question 281. A database administrator needs to determine whether a sudden increase in application response time is caused by CPU pressure, storage latency, blocking, or network delay. Which troubleshooting approach is BEST? Correlate database waits, query metrics, operating-system resources, and network measurements during […]

View Full CompTIA DataSys+ DS0-001 Exam Dumps and Practice Test Dumps   Question 261. A company wants to horizontally scale a very large database by distributing different groups of rows across multiple database servers. Which technique is MOST appropriate? Sharding Vertical scaling Data masking Full backup Correct Answer: 1. Sharding Explanation: Sharding distributes portions of […]

View Full CompTIA DataSys+ DS0-001 Exam Dumps and Practice Test Dumps   Question 241. A database administrator is designing a data warehouse and wants to organize measurable business events such as sales amount and quantity around descriptive entities such as customer, product, and date. Which modeling approach is MOST appropriate? Star schema Highly normalized OLTP […]

View Full CompTIA DataSys+ DS0-001 Exam Dumps and Practice Test Dumps   Question 221. A database administrator wants to determine whether a rapidly growing table should be partitioned by date. Which factor is MOST important? Whether queries and maintenance tasks commonly access data by date ranges The number of database users The database server hostname […]

View Full CompTIA DataSys+ DS0-001 Exam Dumps and Practice Test Dumps   Question 201. A database administrator needs to migrate a large database to a new server with minimal downtime. Which approach is MOST appropriate? Use replication, log shipping, or another synchronization method before final cutover Shut down the source for several days without planning […]

View Full CompTIA DataSys+ DS0-001 Exam Dumps and Practice Test Dumps   Question 181. A database administrator wants to reduce the likelihood that a failed disk causes a database outage. Which solution is MOST appropriate? Storage redundancy such as RAID or equivalent resilient storage Data normalization Query caching Password rotation Correct Answer: 1. Storage redundancy […]

View Full CompTIA DataSys+ DS0-001 Exam Dumps and Practice Test Dumps   Question 161. A database administrator wants to determine whether a slow application is waiting primarily on database locks rather than CPU or storage. Which information is MOST useful? Lock waits and blocking-session details Backup retention settings Number of database schemas Password expiration dates […]

View Full CompTIA DataSys+ DS0-001 Exam Dumps and Practice Test Dumps   Question 141. A database administrator wants to identify rows that appear in one table but have no matching row in another related table. Which approach is MOST appropriate? Use an outer join and filter for unmatched rows Use only ORDER BY Use a […]

View Full CompTIA DataSys+ DS0-001 Exam Dumps and Practice Test Dumps   Question 121. A database administrator wants to improve the performance of a query that filters on Status and OrderDate and sorts by OrderDate. What should be reviewed FIRST? Whether an appropriate composite index could support the filter and sort Whether the database name […]

View Full CompTIA DataSys+ DS0-001 Exam Dumps and Practice Test Dumps   Question 101. A database administrator wants to reduce the risk of unauthorized schema changes in production. Which control is MOST appropriate? Grant DDL permissions only to approved administrative roles Allow all developers to modify production directly Disable auditing Use shared administrator accounts Correct […]

View Full CompTIA DataSys+ DS0-001 Exam Dumps and Practice Test Dumps   Question 81. A database administrator wants to identify whether a particular application account is issuing unusually expensive queries. Which source of information is MOST useful? Query execution statistics associated with the application login Table naming conventions Backup file extensions Database creation date Correct […]

View Full CompTIA DataSys+ DS0-001 Exam Dumps and Practice Test Dumps   Question 61. A database administrator wants to verify whether a slow query is reading far more rows than necessary. Which tool or output is MOST useful? Query execution plan and runtime statistics Backup retention policy Password history User role list Correct Answer: 1. […]

View Full CompTIA DataSys+ DS0-001 Exam Dumps and Practice Test Dumps   Question 41. A database administrator wants to ensure that child rows cannot reference nonexistent parent rows. Which database feature BEST enforces this requirement? Referential integrity through foreign key constraints Table partitioning Data compression Query caching Correct Answer: 1. Referential integrity through foreign key […]

View Full CompTIA DataSys+ DS0-001 Exam Dumps and Practice Test Dumps   Question 21. A database administrator wants to prevent duplicate email addresses from being entered into a Users table while still allowing the primary key to remain a separate numeric ID. Which database object is MOST appropriate? Unique constraint View Trigger log Foreign key […]