Discussion
Cascading rollback is avoided in all protocol except
Answer: D
Correct answer: two-phase locking protocol
Cascading rollback happens when one transaction reads data written by another that later aborts. Strict two-phase locking prevents it by holding exclusive locks until commit, and validation-based protocols prevent it by writing only at commit. Plain two-phase locking releases locks as soon as its shrinking phase begins, so uncommitted data can be read and cascading rollback becomes possible.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development