The Rational class in this chapter is defined as a subclass of java.lang.Number. Which of the following expressions is correct?
a. Rational.doubleValue();
b. Rational.doubleValue("5/4");
c. new Rational(5, 4).doubleValue();
d. new Rational(5, 4).toDoubleValue();
e. new Rational(5, 4).intValue();
c. new Rational(5, 4).doubleValue();
e. new Rational(5, 4).intValue();
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Answer the following statements true (T) or false (F)
1) The AND operator returns a TRUE result if one of the two conditions is true. 2) The substitution variable can be deleted with UNDEFINE command. 3) The WHERE clause restricts individual rows, but it does not filter columns. 4) There is no restriction in deleting a row from a parent table. 5) The DELETE statement without a WHERE clause has the same effect as TRUNCATE.
The construction for ( ; count <= 20;) is not valid.
Answer the following statement true (T) or false (F)