Java Methods, Arrays, and Object-Oriented Programming Concepts Review

What are the benefits of using a method?

Reuse code, Reduce complexity, Easy to maintain

What keyword can be used as a return type for a method that does not return any value?

void

What is the output of the call nPrint('a', 4)?

invalid call

Which method header correctly returns the price of a product?

public static double getPrice(double basePrice, double taxRate)

Which method header tests whether a number is even and returns true if it is?

public static boolean isEven(int number)

What is the value of k after invoking nPrint("A message", k) with k initialized to 2?

2

What happens when an array is passed to a method in Java?

The reference to the original array is passed — no new array is created.

What is the content of the list after the first iteration of the Selection Sort method with list {3.1, 3.1, 2.5, 6.4, 2.1}?

{2.1, 3.1, 2.5, 6.4, 3.1}

What is the output of the following code: System.out.print(matrix[i][1] + " ") in a 4x4 matrix?

2 5 9 13

What is the maximum element found in the 2D array {{1, 2}, {3, 4}}?

4

What does UML stand for in Object-Oriented Programming?

Unified Modeling Language

What is a constructor in Object-Oriented Programming?

A special kind of method that is invoked to create an object.

What is the state of an object in Object-Oriented Programming?

Also known as property or attribute, represented by data fields with their current values.

What defines the behavior of an object in Object-Oriented Programming?

Methods.

What is a class in Object-Oriented Programming?

A template, blueprint, or contract that defines what an object's data fields and methods will be.

What is an object in Object-Oriented Programming?

An instance of a class.