Java Quiz

We are use Scanner Library in java for...

• Give permissions to the user
• Correcting software errors
• Allows user to read data
• Allows the user to enter data

Single line comments look like? 

• \\
• //
• /*
• */

What are some possible causes of compile-time syntax errors reported by javac?

• Capitalization
• Missing semicolons
• missing curly brackets
• all are true

What keyword identifies a group of statements and data that work together as a unit?

• Main
• Static
• Class
• Package

Which of the following best describes the JRE?

• The JRE is Oracle Corporation’s brand name for Java sold at a profit
• The JRE is something that runs in your web browser to enable animations
• The JRE is the development environment in which you type your source code
• The JRE is a combination of the Java Virtual Machine and the Java Class Libraries

Why would you want to add comments to a program?

• So programmer can understand the code better
• To describe the author of a program and the program's purpose
• all are correct
• None are correct

Which function declaration below best describes the entry point of your program?

• void enter(String[] args)
• public static void main(String[] args)
• public static void main()
• static int main(String args)

What file extension will your Java source files have?

• .exe
• .class
• .java
• .metadata

Which will legally declare, construct, and initialize an array?

• int [] myList = {"1", "2", "3"};

• int myList [] = {4, 3, 7};

• int [] myList = (5, 8, 2);

• int myList [] [] = {4,9,7,0};

What is instance variable?

• Instance variables are static variables within a class but outside any method

• Instance variables are variables defined inside methods, constructors or blocks

• Instance variables are variables within a class but outside any method

• None of the mentioned