Java: Classes and Objects UPDATED ACTUAL Exam Questions and CORRECT Answers

Java: Classes and Objects UPDATED
ACTUAL Exam Questions and CORRECT
Answers
OOP - CORRECT ANSWER - Object-Oriented Programming



Attributes - CORRECT ANSWER - Characteristics in an object. For example, a car can be
red or blue


Behavior - CORRECT ANSWER - Dependent on the object type



Three dimensions in object oriented - CORRECT ANSWER - Identity
Attributes
Behavior


Class - CORRECT ANSWER - Describes what an object will be. It is a blueprint,
description, definition of an object


Class syntax - CORRECT ANSWER - Very beginning!
public class (name class here) {


Method - CORRECT ANSWER - Synonymous for behavior


Coding def: a collection of statements that are grouped together to perform an operation


Declaring a method - CORRECT ANSWER - class Myclass{


static void sayHello(){

, //sayHello is the method
System.out.println("Hello World!")
}


public static void main (String [ ] args) {
sayHello();
sayHello();
sayHello();
}
}
/* output:
Hello World!
Hello World!
Hello World!
*/


code reuse - CORRECT ANSWER - You can write a method once, and use it multiple
times, without having to rewrite the code each time


Return value syntax - CORRECT ANSWER - class MyClass {


static int sum(int val1, int val2) {
return val1 + val2;
}


public static void main(String[ ] args) {
int x = sum(2, 5);
System.out.println(x);