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Database Administrator (DBA)
Database Administrator (DBA) is an IT professional responsible for managing, maintaining, and securing an organization's databases to ensure data is reliable, efficient, and accessible to authorized users
Quiz Questions
Q190: Which backup type captures only changes since the last full backup?
Full
Differential
Incremental
Transaction Log
Mirror
Q191: In Oracle, which process writes modified blocks from buffer cache to data files?
SMON
DBWR
LGWR
CKPT
PMON
Q192: What is the main disadvantage of database sharding?
Improves scalability
Increases latency
Simplifies design
Reduces cost
Enhances security
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