Final Review by Mrs. Tabares

question 8:What does Greenfoot do when you compile? Can the computer understand Java?

2016-12-16 19:52:15 UTC

it translate into computer languge which means they change into binary

21. How do you interact with Greenfoot objects?-- Objects can interact ("talk to") other objects by calling methods on those other objects.

2016-12-16 19:53:48 UTC

# 11 What are the resource that can help design the solution in the programming process?

2016-12-16 19:54:30 UTC

Flow chart, pseudocode, and plain english or outline.

3. What are access modifiers? And how do we use them?

2016-12-16 19:54:31 UTC

The keywords private and public are called access modifiers. They are put in the method signature to determine if a class can call that method from another class.

7. What can you do with boolean methods?

2016-12-16 19:54:37 UTC

To set conditions to make an if statement.

2016-12-16 19:54:39 UTC

#26 Identify void and non-void return types.

2016-12-16 19:54:42 UTC

void means "nothing"
non void asks the question

void is just void
non void is "int" and "boolean"

17

2016-12-16 19:55:00 UTC

Identify all the ways Greenfoot helps you find errors. It highlights it red when its wrong.

# 4) What does "this" keyword do?

2016-12-16 19:56:02 UTC

"This" refers to the object in that instance
If you have multiple leaves to be eaten with removeObject(this); it will get rid of that one leaf not all the leaves.

32. What is dot notation? Provide an example.

2016-12-16 19:56:34 UTC

Dot notation is when you call a method not in the class or inherited. The class that has that method is followed by a dot and then the method.
Ex: Greenfoot.getRandomNumber(100)

# 38 Why do we separate the methods?

2016-12-16 19:56:46 UTC

To make them easier to read.

10. Identify how many parameter are in a given signature.

2016-12-16 19:56:51 UTC

c++,

35.What is a loop? And how can you identify how many times it will execute?

2016-12-16 19:56:53 UTC

A loop variable is a local variable that is used for counting the number of iterations in a loop. The way to identity it is by looking at the number in
int i =0
while (i < 100). For example, in this code it would loop 100 times.

q.36 How do we avoid an infinite loop? What code do you use?

2016-12-16 19:57:10 UTC

i = i +1 we put counter so it loop variable by every one time its excuted

22. What is an instance?

2016-12-16 19:57:18 UTC

Can create objects from it. (Objects are also often referred to as instances in programing--The two terms are synonyms.)

1. What do the following methods do and how can you use them to create movement?

2016-12-16 19:57:46 UTC

Both metods getX() and getY() get locations in your world to place actors.

9. identify the structure and parts of a method signature.

2016-12-16 19:58:09 UTC

if( condition)
{
instruction;
instruction:
...
}

19. How are curly braces used ?

2016-12-16 19:58:34 UTC

They are used to enclose groups of statements.

question 14. What is a byte? Bit? And how many bits does a byte have? a byte is a unit of digital information that mostly consists of eight bits.

2016-12-16 19:58:42 UTC

37. A loop is a programming language construct that allows us to express commands.

2016-12-16 19:59:00 UTC

16

2016-12-16 19:59:44 UTC

18. where can you access the source code and documentation?

2016-12-16 19:59:45 UTC

The editor.

39.What is a method name and how do you identify one from a signature?

2016-12-16 20:00:16 UTC

A method is a set of code which is referred to by name and can be called (invoked) at any point in a program simply by utilizing the method's name.

6.What is the syntax rule for class names?

2016-12-16 20:01:01 UTC

13.

2016-12-16 20:02:27 UTC

What are the differences between low and high level languages?
Java and python are a type of high level language. The computer doesn't understand high level languages but humans do. The computer needs programs like Green foot to convert it into binary in order for the computer to understand

24.

2016-12-16 20:02:32 UTC

Parameters are used to pass additional data to a method

Question 5 :What is the purpose of String Concatenation?

2016-12-16 20:02:37 UTC

It merges two strings into one, can be spotted and written with the involvement of a + symbol.
Page 93 of the Greenfoot book.

23. Identify parts of the main window.World, Class diagram, Execution Controls, A class, an Object

2016-12-16 20:03:43 UTC

2

2016-12-16 20:06:17 UTC

a parameterized method call enables you to specify the common base type of the methods arguments that should be the type of the container elements.

Question 34: Why would you add an else-statement to an if- statement?

2016-12-16 20:06:27 UTC

To add a separate condition if the if-statement fails.

31) What are variables used for?

2016-12-16 20:06:41 UTC

Variables are typically used to store information which your program needs to d o its job.

27. what is a sub class and what is a super-class?

2016-12-16 20:07:41 UTC

A subclass is a class that represents a specialization of another. In Greenfoot, this is shown with an arrow in the class diagram.

29.What did the makeKeys() method help us do in the piano scenario?

2016-12-16 20:07:51 UTC

makeKeys() created the keys on the piano scenario.

15. Convert 10 to binary. And 00111000 to decimal.

2016-12-16 20:10:56 UTC

0b1010 =10

28. A method with a void return type present commands; & methods with non-void return types represent questions.

2016-12-16 20:11:40 UTC

30

2016-12-16 20:11:41 UTC

Through the process of abstraction, a programmer hides all but the relevant data about an object in order to reduce complexity and increase efficiency.

12

2016-12-16 20:14:51 UTC

binary is base 2 and decimal is base 10

25. What are syntax errors?

2016-12-16 20:18:44 UTC

A character or strings incorrectly placed in a command or instructions that causes a failure in execution.

20.Identify the structure of an if-statement? How do conditions and instructions work?

2016-12-16 20:22:21 UTC

if the condition is false, it just skippes the instruction inside the braces.. if the condition is true it will compile (run).

16. What does a computer program do?

2016-12-16 20:25:16 UTC

A computer program is a collection of instruction that performs a specific task when executed by a computer.