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
A. Atomicity
B. Durability
C. Isolation
D. All of the mentioned
Answer:A
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
A. Atomicity B. Durability C. Isolation D. All of the mentioned
Explanation:After a transaction completes successfully, the changes it has made to the database persist, even if there are system failures. 7. __________ states that only valid data will be written to the database.