Appendix . Practice Exam Questions
Which of the following strings are not valid modes for the
Consider the following piece of code:
$arr = array(3 => "First", 2=> "Second", 1=> "Third");
list (, $result) = $arr;
After running it, the value of $result would be
This piece of code will not run, but fail with a parse error.
In standard SQL-92, which of these situations do not require or cannot be handled through the use of an aggregate SQL function? (Choose 2)
Calculating the sum of all the values in a column.
Determining the minimum value in a result set.
Grouping the results of a query by one or more fields.
Calculating the sum of all values in a column and retrieving all the values of another column ...
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