Your Name:
CS1713 โ First Exam
Jun 24th, 2009, 12โ1pm
1. True or false? Mark as โTโ or โFโ. (20 points)
(a) Java is case sensitive.
(b) Only letters and digits are allowed in variable names.
(c) All the names (class name, method name, . . .) have the same allowed characters.
(d) Class names must start with an uppercase letter.
(e) A field declaration follows the form private [TYPE] [NAME] = [INIT].
(f) Java knows primitive types and object (or reference) types.
(g) Integer types are made up of byte,short and int.
(h) float and double are used to store decimal numbers.
(i) String and char are used to store character strings.
(j) All other types not listed are object types.
(k) To instantiate a class, you use the keyword New.
For the next two questions, assume the methods are inside a class with a field named x.
(l) The following method is an accessor:
public int getX() {
return x+1;
}
(m) The following method is a mutator:
public void setXPlusOne(int x) {
x = x+1;
}
(n) A constructor follows the declaration rules of normal methods.
(o) You always need to implement a constructor.
(p) Fields are categorized as dynamic or static.
(q) Static fields are used for constant values.
(r) final variables and fields need to be initialized when declared.
(s) Java convention says that final field names should be written with the first
letter capitalized.
(t) Method overloading describes the ability to have multiple methods with the
same name.
