Adding an index saves time searching without increasing the time it takes to add information to the database
Indicate whether the statement is true or false
FALSE
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To facilitate retrieval of specific records from a file, at least one field in each record is chosen as a ________.
a) master record b) record key c) master key d) field key e) master field
Which of the following initializer lists correctly initializes the indexed variables of an array named myDoubles?
a. double myDoubles[double] = {0.0, 1.0, 1.5, 2.0, 2.5}; b. double myDoubles[5] = new double(0.0, 1.0, 1.5, 2.0, 2.5); c. double[] myDoubles = {0.0, 1.0, 1.5, 2.0, 2.5}; d. array myDoubles[double] = {0.0, 1.0, 1.5, 2.0, 2.5};
Explain the following:
(a) Why embedded SQL requires a precompiler (b) Why a database operation has to be prepared before it can be executed. Why embedded SQL can use host variables in SQL statements and JDBC cannot (c) The difference between INSENSITIVE and KEYSET DRIVEN cursors (d) Why deferred constraint checking is preferable in most transaction processing applica- tions. (e) What are the advantages of stored procedures (f) How can the same JDBC program be used to access different DBMSs
The item marked 3 in the accompanying figure is the Current Frame indicator.
Answer the following statement true (T) or false (F)