Explanation:Either all operations of the transaction are reflected properly in the database, or none are. 5. The database system must take special actions to ensure that transactions operate properly without interference from concurrently executing database statements. This property is referred to as
A. Atomicity
B. Durability
C. Isolation
D. All of the mentioned
Answer:A
Explanation:Either all operations of the transaction are reflected properly in the database, or none are. 5. The database system must take special actions to ensure that transactions operate properly without interference from concurrently executing database statements. This property is referred to as
A. Atomicity B. Durability C. Isolation D. All of the mentioned
Explanation:Even though multiple transactions may execute concurrently, the system guarantees that, for every pair of transactions Ti and Tj , it appears to Ti that either Tj finished execution before Ti started or Tj started execution after Ti finished. 6. The property of transaction that persists all the crashes is