Question

An actual update is not allowed to a data item ____________
a) before the corresponding log record is written out to stable storage
b) after the corresponding log record is written out to stable storage
c) until the whole log record has been checked for inconsistencies
d) all of the mentioned

Answer 1

An actual update is not allowed to a data item  before the corresponding log record is written out to stable storage.
Correct anwer:-  before the corresponding log record is written out to stable storage