Podcast
Questions and Answers
What is the purpose of taking three or four checkpoints an hour in a database system?
What is the purpose of taking three or four checkpoints an hour in a database system?
- To lower the frequency of backup operations.
- To reduce the recovery time needed in case of failure. (correct)
- To increase the speed of transaction processing.
- To minimize the risk of database corruption.
Why is it recommended to store the log file on a separate disk from the main database files?
Why is it recommended to store the log file on a separate disk from the main database files?
- To ensure faster access to log data.
- To lower the risk of both database files and log file being damaged simultaneously. (correct)
- To simplify the recovery process.
- To reduce overall storage costs.
In case of extensive damage to a database due to a disk head crash, what is the primary step needed for recovery?
In case of extensive damage to a database due to a disk head crash, what is the primary step needed for recovery?
- Restore the last backup copy of the database on a replacement disk. (correct)
- Create a new log file from scratch.
- Transfer the corrupted data to an external hard drive.
- Completely rebuild the database structure.
What action is necessary if a database becomes inconsistent due to a system crash during transaction execution?
What action is necessary if a database becomes inconsistent due to a system crash during transaction execution?
What does the recovery procedure involve when a database has not been physically damaged?
What does the recovery procedure involve when a database has not been physically damaged?
In the context of deadlock prevention, what is the primary action taken if a lock request times out?
In the context of deadlock prevention, what is the primary action taken if a lock request times out?
What solution is used by several commercial DBMSs for deadlock prevention if a lock request times out?
What solution is used by several commercial DBMSs for deadlock prevention if a lock request times out?
Which of the following algorithms allows only older transactions to wait for younger ones in case of a lock request conflict?
Which of the following algorithms allows only older transactions to wait for younger ones in case of a lock request conflict?
What is the symmetrical approach used in the Wound-Wait algorithm for resolving lock request conflicts?
What is the symmetrical approach used in the Wound-Wait algorithm for resolving lock request conflicts?
Which variant of the Two-Phase Locking protocol ensures that transactions obtain all their locks at the beginning or wait until all the locks are available?
Which variant of the Two-Phase Locking protocol ensures that transactions obtain all their locks at the beginning or wait until all the locks are available?
'Wound-Wait' and 'Wait-Die' algorithms were proposed by which researchers?
'Wound-Wait' and 'Wait-Die' algorithms were proposed by which researchers?
'Conservative 2PL' differs from 'Basic 2PL' by:
'Conservative 2PL' differs from 'Basic 2PL' by:
'Livelock' in transactions can occur when:
'Livelock' in transactions can occur when:
'Extensive damage caused by disk head crash' is an issue related to:
'Extensive damage caused by disk head crash' is an issue related to:
What is the primary aim of using 'symmetrical approaches' in algorithms like 'Wound-Wait?'
What is the primary aim of using 'symmetrical approaches' in algorithms like 'Wound-Wait?'
