Solved MCQ on Distributed Database Transaction Management set-4

1) Commit and rollback are related to ..........

A. data integrity

B. data consistency

C. data sharing

D. data security

2) The transaction wants to edit the data item is called as .......

A. Exclusive Mode

B. Shared Mode

C. Inclusive Mode

D. Unshared Mode

3) For committing a transaction, the DBMS might discard all the records.

A. after image

B. before image

C. log

D. redo log

4) A sophisticated locking mechanism known as 2-phase locking which includes Growing phase and .......

A. Shrinking Phase

B. Release phase

C. Commit phase

D. Acquire Phase

5) A Transaction ends

A. only when it is Committed.

B. only when it is Rolled-back

C. when it is Committed or Rolled-back

D. only when it is initialized

6) In .........., each transactions there is a first phase during which new lock are acquired.

A. Shrinking Phase

B. Release phase

C. Commit phase

D. Growing Phase

7) A transaction processing system is also called as .......

A. processing monitor

B. transaction monitor

C. TP monitor

D. monitor

8) The transactions are always ......... if it always locks a data item in shared mode before reading it.

A. well formed

B. well distributed

C. well locked

D. well shared

9) .......... servers which is widely used in relational database systems.

A. Data servers

B. Transaction servers

C. Query servers

D. Client servers

10) If a distributed transactions are well-formed and 2-phasedlocked, then ................ is the correct locking mechanism in distributed transaction as well as in centralized databases.

A. two phase locking

B. three phase locking

C. transaction locking

D. well-formed locking

11) ......... property will check whether all the operation of a transaction completed or none.

A. Atomicity

B. Consistency

C. Isolation

D. Durability

12) The total ordering of operations across groups ensures ...........of transactions.

A. serializability

B. synchronizability

C. atomicity

D. durability

13) In which state, the transaction will wait for the final statement has been executed?

A. Active

B. Failed

C. Aborted

D. partially committed

14) The ORDER concurrency control technique is based on the property.

A. ordering mechanism

B. inherent ordering

C. total ordering

D. partial ordering

15) Transactions per rollback segment is derived from .....

A. Db_Block_Buffers

B. Processes

C. shared_Pool_size

D. buffers

16) The ............is responsible for ensuring correct execution in the presence of failures.

A. Database Manager

B. Transaction Manager

C. Recovery Manager

D. Executive Manager

17) A distributed transaction can be ............. if queries are issued at one or more nodes.

A. fully read-only

B. partially read-only

C. fully read-write

D. partially read-write

18) The distributed transaction can be completely read-only and the transaction is started with a .......... READ ONLY statement.

A. DISTRIBUTED_TRANSACTIONS

B. TRANSACTION

C. SET TRANSACTION

D. READ TRANSACTION

19) The initialization parameter ................. controls the number of possible distributed transactions in which a given instance can concurrently participate, both as a client and a server.

A. DISTRIBUTED_TRANSACTIONS

B. TRANSACTION

C. SET TRANSACTION

D. CONTROL TRANSACTION

20) A database administrator can manually force the COMMIT or ROLLBACK of a local ............ distributed transaction.

A. in-force

B. in-doubt

C. in-local

D. in-manual

Answers:

1) B. data consistency

2) A. Exclusive Mode

3) B. before image

4) A. Shrinking Phase

5) C. when it is Committed or Rolled-back

6) D. Growing Phase

7) C. TP monitor

8) A. well formed

9) B. Transaction servers

10) A. two phase locking

11) A. Atomicity

12) A. serializability

13) D. partially committed

14) C. total ordering

15) B. Processes

16) A. Database Manager

17) B. partially read-only

18) C. SET TRANSACTION

19) A. DISTRIBUTED_TRANSACTIONS

20) B. in-doubt

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