2.In uni-processor scheduling, shortest remaining time policy is
Options: (A)A policy where scheduler chooses the process that has the shortest expected remaining processing time. (B) A policy where scheduler discards the process that has the shortest expected remaining process time. (C) A policy where process with shortest expected processing time is selected next. (D) None of these. 12
Before any changes to database structure are attempted one should first:
Options: clearly understand the current structure and contents of the database only., test any changes on a test database only., create a complete backup of the operational database only., All of the above should be done.
. In a query’s Design View, right-clicking the sloping portion of the join line between two tables and selecting Delete will delete what?
Options: a. The join line but not the relationship between the two tables
b. The relationship between the two tables locally
c. The relationship between the two tables globally
d. The primary key of the first table