| | c. Any class can contain an unlimited number of methods. | 2. Identify the false statement. | | a. Not all methods return a value, but every method requires a return type. | | | | | b. A method header is also called an implementation. | | | | | c. When a method is declared with public access, methods in other classes can call it. | 3. Identify the false statement. | | a. A method header always contains a return type, an identifier, and a parameter list within parentheses. | | | | | b. A class can contain any number of methods, and each method can be called any number of times. | | | | | c. Arguments are used in method calls; they are passed to parameters in method headers. | 4. Identify the false statement. | | a. You cannot place a method within another method, but you can call a method from within another method. | | | | | b. The return type for a method can be any type used in Java, including int, double, and void. | | | | | c. A method's declared return type must match the type of the value used in the parameter list. | 5. Identify the false statement. | | a. Objects gain their attributes and methods from their classes. | | | | | b. An application or class that instantiates objects of another prewritten class is a class client. | | | | | c. A class is an instantiation of many objects. | 6. Identify the false statement. | | a. When you instantiate objects, each has its own copy of each static data field in the class. | | | | | b. Most fields in a class are private, and most methods are public. | | | | | c. A class header contains an optional access specifier, the keyword class, and an Identifier. | 7. Identify the false statement. | | a. Static methods are instance methods. | | | | | b. The keyword static is used with classwide methods, but not for methods that "belong" to objects. | | | | | c. When you create a class from which objects will be instantiated, most methods are nonstatic because they are associated with individual objects. | 8. Identify the false statement. | | a. An object name is a reference; it holds a memory address. | | | | | b. When you don't write a constructor for a class, Java creates one for you; the name of the constructor is always the same as the name of its class. | | | | | c. When you declare an object, you give it a name and set aside enough memory for the object to be stored. | 9. Identify the false statement. | | a. The automatically supplied default constructor sets all numeric fields to 0, character fields to Unicode '\u0000', Boolean fields to false, and fields that are object references to null. | | | | | b. When you write a constructor, it must have the same name as the class it constructs, and it cannot have a return type. | | | | | c. In Java, you cannot write a default constructor; it must be supplied for you automatically. | 10. Identify the false statement. | | a. The address of an instantiated object can be assigned to a declared reference of the same type. | | | | | b. Unlike a primitive variable, an instantiated object cannot be passed into or returned from a method. | | | | | c. When you declare a primitive variable or instantiate an object from a class, you provide both a type and an identifier. | | | | | | | | | | |
