Crowdly
Додати до Chrome
Questions Bank (1240496 total)
Referential integrity ensures that the value of a foreign key must match one of the existing primary key values in another table
0%
0%
Переглянути це питання
An execution plan is said to be restartable if the write transaction Tj always commits before the read transaction.
100%
0%
Переглянути це питання
Lazy Loading is a design pattern used to postpone object initialization as much as possible.
0%
0%
Переглянути це питання
Cascading in a database can be used to automate actions such as deletion or updating of data in tables dependent on changes made in a parent table.
100%
0%
Переглянути це питання
Backup and recovery mechanisms in database management systems allow data restoration in case of failure
100%
0%
Переглянути це питання
An ER diagram is not a tool used to visually represent the relationships between database entities.
0%
100%
Переглянути це питання
Horizontal fragmentation divides a relation into disjoint tuple sets using a qualification condition
0%
0%
Переглянути це питання
Двигуни внутрішнього згоряння за способом виконання робочого процесу бувають:
0%
0%
0%
0%
Переглянути це питання
Transactions are a collection of successive DB operations that modify a database from a consistent state to an inconsistent state.
0%
100%
Переглянути це питання
Correctness requirements for fragmentation in a VDBMS include reconstructibility, completeness, and disjointness to ensure data consistency and integrity across fragmented sets
100%
0%
Переглянути це питання