Answer:
Giving that: The following is a sequence of undo-log records written by 2 transactions T and U:
< START T >;
< T,A,10 >;
< START U >;
< U, B, 20 >;
< T, C, 30 >;
< U, D, 40 >;
< Commit U >;
< T, E, 50 >;
< Commit T >;
1. < START U >
Recovery action in this case will be undo(-1) and undo(0). All restored to its original Value
log records < T, A, 10 >, < T, abort >; as written out
2. < T, E, 50 >
Recovery action in this case will be undo(8) and redo(0). A and C is restored to its original value, B and D are set to 20 and 40
log records <T, C, 30 >, < T, A, 10 >, < T, abort > are written out
3. < Commit T >
Recovery action in this case will be redo(7) and redo(4). A and C are set to 10 and 30, B and D are set to 20 and 40
The answer is two. Most people think it's one but it's 2
Answer:
bring your own devices
Explanation:
"bring your own devices" paradigm is getting popular since organizations are increasingly allowing users to perform work tasks <em>on their own</em> personal devices, It is preferred because of the benefits and ease for the user. On the other hand, this paradigm opens several security risks.
For example processing sensitive data on personal devices creates risks in case of data recovery or if the device is stolen or lost.
Additionally, <em>control and monitoring</em> of organizational data is harder when users allowed to work on their personal devices. Thus <em>data leakage</em> and <em>public exposure</em> can happen more easily.
