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Data Concurrency

 
Ram Dhan Yadav K
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In EJB for managing data consistency, Which database mechanisms provides data concurrency by preventing "lost updates?
 
Bhagvan Kommadi
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Answer to that is the isolation levels.

Bhagvan K
SCJP, SCJA part I , IBM 483
 
Ram Dhan Yadav K
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The given choices are
a) User security b) Buffer cache c) Log files d) Locking facilities e) Rollback segments
What do you think is the right answer? Is it d?
 
Shankar Ranganathan
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Yes it is D
 
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