Online GK Series

This site is dedicated to the aspirants of competitive exams SSC, UPSC, Railways, Postal Assistants, Bank, GATE and NET

3,00,000 Jobs Waiting For You

Database Backup and Recovery Multiple Choice Questions Answers | Database Management System

1 A deadlock exists in the system if and only if the wait for graph :
A has a cycle in it
B has a path from first node to last node
C is a tree
D none of the above

Answer: Option [A]
2 Data processing cycle consists of :
A Input cycle and output cycle
B Input cycle, output cycle, storage and processing cycle
C Output cycle and processing cycle
D None of these

Answer: Option [B]
3 Which of the following is not a proper state of transaction ?
A Partially aborted
B Partially committed
C Aborted
D Committed

Answer: Option [A]
4 Which of the following concurrency-control schemes is not based on the serializability Property ?
A Two-phase locking
B Graph-based locking
C Timestamp-based locking
D None of the above

Answer: Option [D]
5 Rollback of transactions is normally used to :
A recover from transaction failure
B update the transaction
C retrieve old records
D repeat a transaction

Answer: Option [A]


Useful Computer Science EBooks