What kind of indexing is usually needed to efficiently evaluate the following query?
SELECT E.Id
FROM Employee E
WHERE E.salary <= 100000 AND E.salary >= 30000
Secondary B+ tree index with search key salary
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Answer the following questions true (T) or false (F)
1. An applet class is normally defined as a derived class of the class JApplet. 2. Applets normally do not contain a main method.
What is a data structure?
a. It is an organization of data elements and collection of functions that can be applied on data. b. It's a way to store data on the hard drive. c. It's all the data to be loaded into a program. d. It's a way to feed a program with data.
Which is better for highly secure environments?Why?
What will be an ideal response?
____ allow the physical data to reside at separate and independent locations that are electronically networked together.
A. Discrete databases B. Singleton databases C. Distributed databases D. Normalized databases