AP Computer Science A Summer Assignment

Transcription

1 AP Computer Science A Summer Assignment Welcome to AP Computer Science A! I am looking forward to our class. Please complete the assignment below. the completed Part I as an attachment to kgeorge@glenridge.org by Monday, August 24 th. You can send the file as either a Word, Google Doc, or Adobe Acrobat document. Part II (on index cards) will be collected on the first day of class. I will be checking my fairly regularly during the summer. Please me at kgeorge@glenridge.org if you are having difficulty completing the assignment. Enjoy your summer! Mr. George Part I: Hardware and Software (20 points) Using chapters 1 to 4 of the Online Introduction to Computer Science tutorial at answer the questions below. Please use Microsoft Word or Google Docs. Do not copy and paste from the tutorial - paraphrase and use your own words. Chapter 1: Hardware and Software 1. Explain the difference between hardware and software. Provide an example of each. 2. List and describe the five major hardware components of a computer system. 3. Explain the difference between application programs and systems programs. Provide an example of each. 4. What is an Operating System? Explain its function. 5. What is meant by booting a computer? Where does the name come from? 6. What is a network? 7. Explain the difference between a local-area network and a wide-area network? 8. What is a network protocol? 9. What does URL stand for and what does it identify? 1

2 Chapter 2: Analog and Binary Signals 1. What does Binary mean? 2. What is a Bit? 3. Explain some of the advantages of using Binary? Chapter 3: Computer Memory 1. Explain the difference between a bit and a byte? 2. What is a kilobyte, megabyte, gigabyte, terabyte? 3. What is a memory address? 4. What is a file? Chapter 4: The Processor 1. Explain the following terms: a. Executable program b. High Level language c. Source program d. Compiler Part II: Number Systems (15 points) Read the Number Systems Conversion notes posted on the APCS page accessible from my teacher web page on the school web site. Using index cards and in your own words, describe the conversion process and provide examples of the following: a) Converting a Decimal number (base 10) to Binary (base 2) b) Converting a Decimal number (base 10) to Octal (base 8) c) Converting a Decimal number (base 10) to Hexadecimal (base 16) d) Converting from Binary to Decimal e) Converting from Octal to Decimal f) Converting from Hexadecimal to Decimal 2

3 Part III: Install BlueJ and test that it works Download and install BlueJ from: Scroll down and select the right download for your computer. The Java JDK must be installed on the computer in order for BlueJ to run. When the download is complete, run the installer to complete the installation. 3

4 After installing BlueJ, follow the instructions for the lab below to write a simple print class. This will test that BlueJ was installed correctly. You will have programming homework for our class. Lab 1 Test that BlueJ was installed properly Create a folder on your computer to store class assignments. From the Project menu, select New Project: Create a new project, BlueJProject1. Select your folder and enter the project name: Click on the Create button. 4

5 The BlueJ code editor will appear. Click on the New Class button and enter Printer for the Class name. Click on the OK button: A rectangle representing the class will appear. Right click on the class diagram to edit the source code: 5

6 BlueJ provides skeleton code when a class is created to help the programmer get started: Fill in your name as the author and make the version 1.1. Remove the private instance variable, x, and any reference to it. For this exercise we will not need it. Remove the sample method and the comment before it. Write a new method, printhelloworld. It will be void and print Hello World to the console: System.out is used to print in Java. The method println prints whatever input parameter is passed to it and then skips a line. Click on the compile button and close the editor. 6

7 Right click on the Printer class and select new Printer() to create an object of type Printer: The Create Object dialog will appear and prompt you for the name of the object variable which will reference the Printer object: Click on the ok button to use the default instance name, printer1. A red square will appear at the bottom of the BlueJ editor. It represents the newly created object of type, Printer: 7

8 Right click on the object to run its method. Select the printhelloworld() method: The method will open a Terminal output window and print the message: If this works, you have installed BlueJ properly. 8