3. Database Design

Transactions — Quiz

Test your understanding of transactions with 5 practice questions.

Practice Questions

Question 1

Which of the following concurrency control protocols is most susceptible to cascading rollbacks?

Question 2

In the context of database recovery, what is the primary function of the 'ARIES' (Algorithm for Recovery and Isolation Exploiting Semantics) protocol?

Question 3

Consider a database system where a transaction $T_1$ performs a series of updates, and before $T_1$ commits, another transaction $T_2$ reads the uncommitted data written by $T_1$. If $T_1$ then aborts, $T_2$ has read data that was never committed. This specific concurrency issue is known as a:

Question 4

Which of the following is a key characteristic of an 'undo' operation in database recovery?

Question 5

In a database system utilizing a 'write-ahead logging' (WAL) protocol, which of the following statements must be true to guarantee data integrity during recovery?