GATE CS 2021 : Database Quiz 7 (App update required to attempt this test)
Attempt now to get your rank among 746 students!
I. r1(A), w1(B), r2(B), w2(C), r3(C), w3(A)
II. w3(A), r1(A), w1(B), r2(B), w2(C), r3(C)
III. r1(A), r2(A), w1(B), w2(B), r1(B), r2(B), w2(C), w1(D)
IV. r1(A), r2(A), r1(B), r2(B), r3(A), r4(B), w1(A), w2(B)
I. The transaction is executed as a single unit
II. If the database were in an inconsistent state before a transaction, it can go to consistent state after the transaction.
III. If the database operations do not update the database but only retrieve data, this type of transaction is called a read-only transaction.
IV. The terminated state refers to the transaction leaving the system.
The number of incorrect statement/s are:
A = A – 50;
B : = B + 50;
C: = C – 100;
A, B, C before execution were Rs. 1000, Rs. 2000, Rs. 700 respectively and the system crash occurs after write (B), then which of the following is correct?
Let N be the no of vertices in a particular graph with zero edges, than, how many topological orders are possible for the graph if n= 4 _______.
- 746 attempts
- 3 upvotes
- 7 comments