Crash Recovery Quiz

What is crash recovery?

• The process of upgrading the database software

• The process of creating a backup of the database

• The process of deleting all transactions in a database

• The process of restoring a database to a consistent state after a crash

What does ARIES stand for?

• Algorithm for Restoring Integrity and Ensuring Security

• Advanced Recovery and Isolation for Efficient Systems

• Automated Recovery and Isolation for Enhanced Security

• Algorithm for Recovery and Isolation Exploiting Semantics

Which of the following is a condition that can result in a transaction failure?

• Network speed issues

• User error in data entry

• Increased database size

• Power failure on machine

What is the first principle of ARIES?

• Creating backups periodically

• Repeating history during redo

• Write ahead logging

• Logging changes during undo

What is the purpose of the analysis phase in ARIES recovery?

• To restore the database to its original state

• To compute necessary information from the log file

• To create a backup of the database

• To delete all uncommitted transactions

What does the term 'atomicity' refer to in crash recovery?

• The ability to recover from hardware failures

• The speed of the recovery process

• The property that ensures all operations of a transaction are executed or none are

• The method of logging changes to the database

What happens during the redo phase of ARIES?

• The log is cleared

• The database is restored to the exact state at the crash

• The database is backed up

• All transactions are deleted

What is the role of a transaction log?

• To create backups of the database

• To store user data

• To record changes to the database and ensure ACID properties

• To manage user permissions

What does durability guarantee in the context of transactions?

• Transactions will be executed quickly

• Transactions that have committed will survive permanently

• Transactions can be modified after they are committed

• Transactions can be rolled back at any time

What is the purpose of checkpointing in a database?

• To create a snapshot of the database state

• To compress database files

• To increase database performance

• To delete old transactions