Chapter 6 Quiz
A variable declared in a method is called a what?
A local variable
stub
A simple but incomplete version of a method can be used for the methods waiting to be implemented
pass-by-value
A value of an argument is passed to the parameter
Describe method abstraction
Achieved by separating the use of a method from its implementation. The client can use a method without knowing the program's implementation. Also known as information hiding or encapsulation
Method signature
Composed of the method name and the parameter list
method
Consists of its modifier, method name, parameters, return value type and body. May return a value, or returnValueType. Otherwise void.
overloading methods
Enables you to define the method with the same name as long as their signatures are different
scope of a variable
Part of the program where the variable can be referenced
Some programming languages refer to methods as __________ and __________. difference?
Procedures and functions; procedures are void methods and a value-returning method is called a function
Methods
Provide powerful constructs
Parameter's list
Refers to the type, order, and number of a method's parameters.
Describe the scope of a local variable
STARTS from its declaration and continues to the end of the block that contains the variable. Must be declared and initialized before it is used
divide and conquer
Stepwise refinement; decomposing a program into subproblems
method signature
The method name and the parameter list together
argument
The value passed to the parameter, or actual parameter
actual parameter
The value passed to the parameter, or argument. They are optional, like look at Math.random()
What does it mean for a method to be overloaded?
This means that two methods can have the same name, as long as their method parameter lists differ
What approaches are useful for large programs and why?
Top-down or bottom-up approach. Writing a program all at once is ill-advised, it takes repetitive compilations and systemic debugging, leading to saving time
formal parameter (i.e., parameter)
Variables defined in the method header
When a method is called and the program control goes to that method, when does this control return to the caller?
When the return statement is executed or its method-ending closing brace is reached
ambiguous invocation
When two or more possible matches for the invocation of a method are present, and the compiler cannot determine the best match.
Are parameters optional?
Yes, so a method doesn't need parameters
Can a value-returning method also be invoked as a statement in Java?
Yes; in this case, the caller simply ignores the return value
Can a return statement be used in a void method for terminating the method and returning to the method's caller?
Yes; this is useful occasionally for circumventing the normal flow of control in a method
modifier
like "public static"
Method header specifies ________________.
modifiers, return value type, method name, parameters
The arguments that are passed to a method should have the same _______, _______, and ______ as the parameters in the method signature
number, type, and order
A method may return a value. The (1) ___________ is the data type of the value the method returns. If no value is returned, the (1) _______ is the keyword (2)_________?
returnValueType; void
