Introduction to Database System
A race condition occurs when

None of the listed here
two users of the DBMS are interacting with different files at the same time
Two concurrent activities interact to cause a processing error
Both of the listed here

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Introduction to Database System
With respect to data input, the most accurate description of batch control is

All of these
dividing documents to be entered into batches
controlling the input of each input clerk
None of these
comparing to a pre-calculated figure the total of a data item summed across a batch records put into the system

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Introduction to Database System
In SQL, the CREATE TABLESPACE is used

to add/rename data files, to change storage
All of these
to create a database trigger
to create a place in the database for storage of scheme objects, rollback segments, and naming the data files to comprise the tablespace
None of these

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