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JNU PhD CS 2019
October 3, 2023
Database-Management-System
October 3, 2023
JNU PhD CS 2019
October 3, 2023
Database-Management-System
October 3, 2023

UGC NET CS 2011 June-Paper-2

Question 16
Which of the following is the recovery management technique in DDBMS ?
A
2PC (Two Phase Commit)
B
Backup
C
Immediate update
D
All of the above
Question 16 Explanation: 
2PC (Two Phase Commit): The protocol achieves its goal even in many cases of temporary system failure (involving either process, network node, communication, etc. failures), and is thus widely used. It has commit-request phase (or voting phase) and commit phase.
→ Sometimes, power failures are happens backup and immediate update techniques help to recover.
Correct Answer: D
Question 16 Explanation: 
2PC (Two Phase Commit): The protocol achieves its goal even in many cases of temporary system failure (involving either process, network node, communication, etc. failures), and is thus widely used. It has commit-request phase (or voting phase) and commit phase.
→ Sometimes, power failures are happens backup and immediate update techniques help to recover.
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