A text box that displays an employee’s last name from a field in a table is an example of a(n) ____ control.
A. bound
B. unbound
C. calculated
D. dynamic
Answer: A
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Why would items be shuttled to slower levels of the hierarchy?
What will be an ideal response?
Add a method getListForQuery(String query) to the DatabaseManager class that will return a List of all the columns in the first row returned in the result set for the passed query. You can find out how many columns have been returned by getting a ResultSetMetaData object from the ResultSet object using the method getMetaData() method. You can then ask the ResultSetMetaData object for the number of columns by using the method getColumnCount().
What will be an ideal response?
Figure 23.6 shows the log corresponding to a particular schedule at the point of a system crash for the four transactions T1, T2, T3, and T4 of Figure 19.4. Suppose that we use the immediate update protocol with checkpointing. Describe the recovery process from the system crash. Specify which transactions are rolled back, which operations in the log are redone and which (if any) are undone, and whether any cascading rollback takes place.
What will be an ideal response?
Which SQL statement is used to retrieve data from tables in a database?
A) SQL ORDER BY B) SQL FROM C) SQL SELECT D) SQL WHERE