Millionaire Mode

Transactions and Concurrency Control

Question 1 of 15

Which of the following scenarios may leaves the transaction vulnerable to dirty reads, phantom reads etc.. in a database system?

  1. A transaction writes a data item after it is read by an uncommitted transaction.
  2. A transaction reads a data item after it is read by an uncommitted transaction.
  3. A transaction reads a data item after it is written by a committed transaction.
  4. A transaction reads a data item after it is written by an uncommitted transaction.

Prize Money

15₹7 Crores
14₹1 Crore
13₹50,00,000
12₹25,00,000
11₹12,50,000
10₹6,40,000
9₹3,20,000
8₹1,60,000
7₹80,000
6₹40,000
5₹20,000
4₹10,000
3₹5,000
2₹2,000
1₹1,000