COMPU SCIENCE 2
After the following code is run: double num1 = 9.6; int num2 = (int)num1; What is the value in num2? Select one: a. 9 b. 6 c. 9.60 d. 9.6
A
After the following code runs, how many copies of the House object do you have? House myHousē = new House(); House myHousé = myHousē; Select one: a. 1 b. 2 c. Impossible to tell d. 0
A
How would you declare and initialize a String variable called "first" that contains "I'm alive!"? Select one: a. String first = "I'm alive!"; b. String first = new "I'm alive!"; c. String first = I'm alive!; d. first String = "I'm alive!";
A
How would you declare and initialize a primitive wrapper class for the double data type that contains the value 1.0? Select one: a. Double myDouble = new Double(1.0); b. Double(4.0) = myDouble; c. double myDouble = 4.0 d. double myDouble = 4.0F;
A
How would you write a single-line comment with the text "explanation" ? Select one: a. // explanation b. "explanation" c. <!-- explanation --> d. ' explanation
A
If you create a virus to infect other computers, which of the ACM ethical principles have you violated? Select one: a. All of these are correct b. Do no harm c. Respect privacy d. Contribute positively
A
If your top-level source directory is ROOT, where must the object "my.utilities.Thing" be located? Select one: a. ROOT\my\utilities\Thing.java b. You can place source files wherever you like. c. ROOT\my.utilities\Thing.class d. ROOT\Thing.java
A
In what kind of programming language is the program distributed in source form and run directly within another piece of software? Select one: a. Scripted Language b. High-Level Interpreted Language c. Assembly Language d. Machine Language
A
In what kind of programming language is the source code transferred between computer systems and turned into machine language by an interpreter program? Select one: a. High-Level Interpreted Language b. Machine Language c. Assembly Language d. Scripted Language
A
What are some possible causes of compile-time syntax errors reported by javac? Select one: a. all of these are true b. missing semi-colons c. missing curly braces d. spelling errors
A
What are the two main categories of numeric data types as stored in computers? Select one: a. integer and floating point b. positive and negative c. real and imaginary d. big and small
A
What best describes the contents or format of a file? Select one: a. file extension b. file attributes c. directory where the file is located d. file length
A
What character starts and stops the text string input into the println() function? Select one: a. " (double quote) b. * (asterisk) c. / (forward slash) d. ' (single quote)
A
What does the top-left corner of the web page contain on the online Java reference documentation website? Select one: a. A list of Java packages b. Java functions c. Java class names d. A toll-free help phone#
A
What folder holds Eclipse workspace settings? Select one: a. .metadata b. Settings are stored in a text file, not a folder c. config d. eclipse_settings
A
What is the smallest possible integer value that can be stored in a byte data type? Select one: a. -128 b. -32,768 c. -2,147,483,648 d. -9,223,372,036,854,775,808
A
What programming language uses more human-readable source code and can be compiled or converted into machine code? Select one: a. High-Level Compiled Language b. Scripted Language c. Machine Language d. Assembly Language
A
What was the first high-speed, purely electronic, digital computer which could be programmed and re-programmed to handle a wide array of tasks? a. The ENIAC b. Von Neumann's Computer c. Moore's Computer d. The iMac
A
Where does Eclipse store your *.java source files by default? Select one: a. "src" directory b. In the root of the project directory c. "java" directory d. "files" directory
A
Which of the following components can be used to easily transfer data between computers? a. Removable storage media b. Hard Drive c. Motherboard d. RAM
A
Which of the following is an example of application software? Select one: a. A word processing program b. A mouse device driver c. Linux d. Microsoft Windows
A
Which of the following is not a peripheral? a. CPU b. Printer c. Webcam d. Scanner
A
Which of the following variable names is invalid? Select one: a. All of these are valid b. MyScore c. _myScore d. My_1_Score
A
Which programming language is used primarily for mathematical calculations and tasks? Select one: a. MATLAB b. HTML c. Java d. SPICE
A
Which statement will run your HelloWorld.java program once it is successfully compiled? Select one: a. java HelloWorld b. run HelloWOrld c. HelloWorld.exe d. java HelloWorld.class
A
Which two operating systems appeared in the mid-1980's with graphical user interfaces? Select one: a. Microsoft Windows and Mac OS b. None of these are correct c. Linux and Mac OS d. Microsoft Windows and Linux
A
You can get pop-up help on Java and the Java Class library while typing in the main source editor. Select one: True False
A
Given the following code, what is the result of calling myString1.equals(myString2)? String myString1 = "abc"; String myString2 = "ABC"; Select one: True False
B
How are the words in a package name normally arranged left-to-right? Select one: a. there is no particular convention b. most general to most specific c. most specific to most general d. alphabetical order
B
How can you get help on the Eclipse IDE itself? Select one: a. There is no Eclipse help; the software is easy to use. b. Select "Help -> Help Contents" from the menu c. Help about Eclipse will automatically pop up as you type code d. Look within the online JRE documentation for Eclipse help
B
How do some companies restrict your rights to copy software as listed in the U.S. Copyright Act? Select one: a. By marking the software as "read-only" on your file system b. By selling you a license under a EULA to use the software instead of full rights c. By causing the software to self-destruct after a period of time d. By making the software very expensive
B
How many projects can belong to an Eclipse workspace? Select one: a. Up to 3 b. 0, 1, or more c. A workspace and a project are exactly the same thing d. Only 1
B
What command-line phrase will tell you the kind of Java you have installed on your computer? Select one: a. javadoc -kind b. java -version c. javac -type d. jar -vers
B
What company invented Eclipse? Select one: a. Sun Microsystems b. IBM c. Oracle d. Microsoft
B
What is a computer's primary memory? a. The largest storage device on a computer. b. It holds the running programs and active data on your computer. c. The input and output devices that are connected externally to the computer. d. A type of removeable storage media.
B
What is one common way to select a package name for a project? Select one: a. Use a secret phrase like a password b. Use a company's domain name for uniqueness c. Use an encryption key for security d. Use a very short name to save typing
B
What is the difference between the print() and println() functions? Select one: a. println() will accept any string; print() will ony take variables b. println() will automatically wrap to the next line; print() will not c. print() will automatically wrap to the next line; println() will not d. println() is only for output; print() can also be used to gather user input
B
What is the smallest possible integer value that can be stored in a int data type? Select one: a. -32,768 b. -2,147,483,648 c. -128 d. -9,223,372,036,854,775,808
B
What is the smallest possible integer value that can be stored in a long data type? Select one: a. -32,768 b. -9,223,372,036,854,775,808 c. -128 d. -2,147,483,648
B
What is the smallest possible integer value that can be stored in a short data type? Select one: a. -2,147,483,648 b. -32,768 c. -9,223,372,036,854,775,808 d. -128
B
What keyword do you use to create an object? Select one: a. create b. new c. declare d. allocate
B
When was the first version of Java released? Select one: a. 2000's b. 1990's c. 1980's
B
Which command do you use at a command prompt to move between directories? Select one: a. move b. cd c. goto d. dir
B
Which data type can hold exactly two different values? Select one: a. binary b. boolean c. byte d. char
B
Which object is used to write output to the console? Select one: a. Console b. System.out c. System.in d. OutputStream
B
Which of the following are important to include in a ZIP file to represent your entire project? Select one: a. .project file b. All of these c. "src" directory d. .classpath file
B
Which of the following best describes the JRE? Select one: a. The JRE is something that runs in your web browser to enable animations b. The JRE is a combination of the Java Virtual Machine and the Java Class Libraries c. The JRE is Oracle Corporation's brand name for Java sold at a profit d. The JRE is the development environment in which you type your source code
B
Which of the following components is included in the JDK and not the JRE? Select one: a. "javadoc", which will make HTML documentation from source comments b. All of these are included in the JDK and not the JRE c. "jar", which will bundle many Java .class files together into a single package d. "javac", which is the compiler that will turn your source code into bytecode
B
Which of the following data types takes up the most bytes of computer memory? Select one: a. short b. double c. char d. int
B
Which of the following is a physical safety feature that can reduce risk to business data? Select one: a. A web browser b. A backup power generator c. A filing cabinet d. A database
B
Which operating system is widely used on embedded devices such as smart phone and network hardware? Select one: a. Mac OS b. Linux c. Microsoft Windows d. MS-DOS
B
Which part of a computer is responsible for executing the software programs? a. RAM b. CPU c. Peripheral d. Hard Drive
B
Which type of software license allows you free access to the program's original source code? Select one: a. Freeware b. Open Source c. All of these d. Proprietary
B
You are working for a company that has created a program that is gathering information from the user without their knowledge. Your boss gives you full permission to use this information and to share it with other companies. Should you do so? Select one: a. Yes, because copyright law allows this information sharing. b. No, you may only use or share private information when you have obtained the owner's explicit permission for the use of that information. c. Yes, your boss has given full permission. d. Yes, because the user is using your software, you have the right to their information.
B
How can you get help on Java functions with your mouse? Select one: a. You cannot access the help system with the mouse b. Double-click on a function c. Hover the cursor over a function d. Swipe a function from left to right
C
How many independent Java classes can you put within one source file? Select one: a. 0 b. up to 3 c. 1 d. as many as you like
C
If you get a "file not found" error when running "javac HelloWorld.java", what is a possible explanation? Select one: a. Your command line is not focused on the directory you thought it was b. HelloWorld.java does not exist in the current directory c. Both of these are true d. Neither of these is possible
C
If you want to install a new type of printer on your computer, what kind of software might you need to make it work? Select one: a. Operating system b. Application c. Device driver d. A programming language like C# or Java
C
What area in the Eclipse UI will show the contents of your source code files? Select one: a. Toolbar b. Package Explorer c. Main working area d. Menu
C
What important box should you check for the first class in your project on the New Java Class dialog? Select one: a. Enclosing type b. final c. public static void main(String[] args) d. abstract
C
What important piece of information do you need to enter in the New Java Project dialog? Select one: a. The package name b. The class name c. The project name d. The workspace location
C
What is a downside to a weakly-typed programming language as compared to a strongly-typed programming language? Select one: a. Weakly-typed languages will run faster than strongly-typed languages b. It is more difficult to write code for weakly-typed languages c. Weakly-typed languages will not detect logical errors at compile-time d. Weakly-typed languages must identify all data with a specific data type
C
What is a likely result if you just type "javac HelloWorld.java" from a Windows command line? Select one: a. None of these are true b. You will get an error because you shouldn't add the .java extension c. You can get an error if 'javac' is not found in the system PATH d. You will get an error because HelloWorld is not a valid class name
C
What is the default value of a reference variable after it is declared? Select one: a. Random junk until you initialize it b. false c. null d. 0
C
What is the smallest data type that can hold the value 126? Select one: a. int b. float c. byte d. short
C
What text string is printed to the screen with this statement? System.out.println("#\"##\\#"); Select one: a. #### b. #\"##\\# c. #"##\# d. None; there is a syntax error
C
What website will give you more information about the specific computer fraud and crime laws in your state? Select one: a. The Computer Crime Company website b. The US Treasury website c. The National Conference of State Legislatures website d. The Microsoft website
C
Where do anti-virus programs place infected files for you to review and clean? Select one: a. hospital b. inbox c. quarantine d. trash can
C
Where does Eclipse store your *.class output files by default? Select one: a. In the root of the project directory b. "class" directory c. "bin" directory d. "java" directory
C
Which federal law deals with computer fraud and abuse? Select one: a. The Computer Anti-Trust and Compliance Act b. The Computer Crime Act c. The Computer Fraud and Abuse Act d. The Fraud Law
C
Which language was created by adding object-oriented concepts added to an earlier language? Select one: a. Machine language b. C# c. C++ d. Java
C
Which of the following are key features of the Java language? Select one: a. It is object-oriented b. It is easier to use in some respects than older languages like C++ c. All of these are true d. It can run on many different operating systems without re-compiling from source
C
Which of the following concepts are commonly found in EULAs? Select one: a. Don't copy or sell b. Use at your own risk c. All of these d. Licensed, not sold
C
Which of the following is a security risk for personal and business information? Select one: a. Stolen data b. Lost data c. All of these are correct d. Infected Applications
C
Which of the following operating system is an "open-source" operating system? a. Apple's Mac OS X b. Microsoft Windows c. Linux d. Windows 8
C
Which of the following security strategies can help protect private data? Select one: a. All of these are good security strategies b. Publish clear access instructions for everyone c. Encrypt data as it moves between locations d. Write down your password and stick it on your monitor
C
Which security and privacy law is intended to protect children while they are online? Select one: a. Gramm-Leach-Bliley Act (GLBA) b. Electronic Communications Privacy Act (ECPA) c. Children's Online Privacy Protection Act (COPPA) d. U.S. Copyright Act
C
Which security measure would most effectively help protect a computer or network from suspicious connections or traffic coming from the outside network? Select one: a. encryption b. username and password login c. firewall d. anti-virus program
C
How do you add additional features to Eclipse Select one: a. You can't; Eclipse is a closed system b. Change existing features to do what you want c. Hope that new features are included in the next release d. Write plug-in modules
D
How much does Eclipse cost? Select one: a. $25 per developer b. $99 per year c. Depends on where you buy it d. Eclipse is free
D
How often are new versions of Eclipse released? Select one: a. every 3 years b. every 10 years c. monthly d. about once a year
D
How would you show in your source code that your class is part of package "my.utilities"? Select one: a. import utilities.my b. package my; package utilities; c. import my.utilities d. package my.utilities;
D
If you needed to hold the integer value 36,493, which numeric data type would you use? Select one: a. double b. byte c. short d. int
D
What area in the Eclipse interface holds a tree showing the projects and components in your workspace? Select one: a. Main working area b. Toolbar c. Menu d. Package Explorer
D
What file extension is used to store Java source code? Select one: a. .source b. .j c. .class d. .java
D
What is the impact of white-space on the compiler? Select one: a. white-space is not allowed b. white-space can be used to fix errors c. white-space can be used to terminate statements d. none; the compiler ignores white-space
D
What is the value of result1 after this code runs? int valuē = 10; int valué = 4; double result1 = valuē / valué; Select one: a. 2.5 b. Runtime error; you cannot divide integers and store in a double result c. 3.0 d. 2.0
D
What keyword do you use to ensure a variable can never change values while your program is running? Select one: a. Variables can always be changed with an assignment statement b. static c. const d. final
D
What keyword identifies a group of statements and data that work together as a unit? Select one: a. static b. main c. package d. class
D
What language can be run on different operating systems, including Mac OS and Linux, without re-compiling the source code? Select one: a. C++ b. Visual Basic c. C# d. Java
D
What programming language allows programmers to write individual CPU-level instructions using short character sequences that can be directly translated into machine language? Select one: a. Scripted Language b. Machine Language c. High-Level Interpreted Language d. Assembly Language
D
Where can you see a list of errors in your project? Select one: a. Debugger b. Toolbar c. Package Explorer d. The Problems tab at the bottom
D
Which company hosts online Java reference documentation? Select one: a. Sun Microsystems b. The Eclipse Foundation c. Microsoft d. Oracle
D
Which escape character can be used to insert a backslash in a string? Select one: a. \" b. // c. &\ d. \\
D
Which of the following describes business ethics? Select one: a. A list of policies for international commerce. b. A type of EULA. c. A type of anti-virus software. d. The moral principles that govern a person's or business's behavior.
D
Which of the following is an example of secondary memory? a. ROM b. RAM c. Motherboard d. Hard Drive
D
Which programming language is composed of the actual bits and bytes (the 1's and 0's) that CPUs actually understand? Select one: a. High-Level Compiled Language b. High-Level Interpreted Language c. Assembly Language d. Machine Language
D
Which statement correctly assigns the character value 'x' to the char variable myChar? Select one: a. myChar as char = 'x'; b. character myChar = "x"; c. char myChar = "x"; d. char myChar = 'x';
D
Who currently manages Eclipse? Select one: a. Microsoft b. Sun Microsystems c. IBM d. The Eclipse Foundation
D
Why is Visual Basic sometimes used for "Rapid Application Development"? Select one: a. It was written from the ground up as an object-oriented language b. Programs written in Visual Basic run faster than other languages c. It produces very efficient compiled output d. It's very easy to get a program up and running quickly
D
