Database Systems MCQs – Mock Test 346

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What is Database System MCQs – Mock Test 346 PDF Download

MCQ 1726: Different users can have access to the same data, possibly even at the same time, is known as:

Shared-time access
Current access
Real-time access
Concurrent access

MCQ 1727: A query expression in the tuple relational calculus is done as:

{p| P(t)}
{p| t(p)}
{t| P(t)}
{p| t(t)}

MCQ 1728: The database system before reading or modifying actual data, consults the:

Physical level
Model
Data dictionary
View level

MCQ 1729: The external language procedures need to deal with null values in:

In parameters
Out parameters
Exit parameters
Both A and B

MCQ 1730: The final result of the delete would depend on the order in which the tuples are:

Stored
Retrieved
Processed
Tested

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