In a relational database, each column in a table should have a ____ name and entries in each column should match this column name.
A. unique
B. pre-defined
C. computer-generated
D. duplicate
Answer: A
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Which of the following data types can be used to represent integers?
a. char b. long c. short d. All of the above.
Answer the following statements true (T) or false (F)
1. The computer is a tool used by so many professionals that it cannot be easily categorized. 2. Without programmers, the users of computers would have no software, and, without software, computers would not be able to do anything. 3. The contents of a variable cannot be changed while the program is running. 4. Java source files end with the .class extension. 5. When an object's internal data is hidden from outside code and access to that data is retricted to the object's methods, the data is protected from accidental corruption.
Every memory location has a(n) ________.
Fill in the blank(s) with the appropriate word(s).
Hand trace a stack X through the following operations:
``` X.push(new Integer(4)); X.push(new Integer(3)); Integer Y = X.pop(); X.push(new Integer(7)); X.push(new Integer(2)); X.push(new Integer(5)); X.push(new Integer(9)); Integer Y = X.pop(); X.push(new Integer(3)); X.push(new Integer(9)); ```