1
GATE CSE 2024 Set 2
MCQ (Single Correct Answer)
+1
-0.33

Once the DBMS informs the user that a transaction has been successfully completed, its effect should persist even if the system crashes before all its changes are reflected on disk. This property is called

A

durability

B

atomicity

C

consistency

D

isolation

2
GATE CSE 2024 Set 2
MCQ (Single Correct Answer)
+1
-0.33

In the context of owner and weak entity sets in the ER (Entity-Relationship) data model, which one of the following statements is TRUE?

A

The weak entity set MUST have total participation in the identifying relationship

B

The owner entity set MUST have total participation in the identifying relationship

C

Both weak and owner entity sets MUST have total participation in the identifying relationship

D

Neither weak entity set nor owner entity set MUST have total participation in the identifying relationship

3
GATE CSE 2024 Set 2
MCQ (More than One Correct Answer)
+1
-0

Which of the following file organizations is/are I/O efficient for the scan operation in DBMS?

A

Sorted

B

Heap

C

Unclustered tree index

D

Unclustered hash index

4
GATE CSE 2024 Set 2
MCQ (More than One Correct Answer)
+1
-0

Which of the following statements about the Two Phase Locking (2PL) protocol is/are TRUE?

A

2PL permits only serializable schedules

B

With 2PL, a transaction always locks the data item being read or written just before every operation and always releases the lock just after the operation

C

With 2PL, once a lock is released on any data item inside a transaction, no more locks on any data item can be obtained inside that transaction

D

A deadlock is possible with 2PL

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